2007 Mercedes-benz GL Class Owners Manual

grade drive.

Warning!

Never turn the vehicle around on steep inclines. The vehicle might roll over. If the vehicle cannot complete the attempted climb, back it down in reverse gear.

Operation Driving instructions

i The hill start assist system supports you when driving uphill. For more information, see “Hill start assist sys- tem” (컄 page 199).

i Vehicles with enhanced off-road package* are equipped with automatic locks for the center and rear axle differential to improve vehicle traction.

Traction in steep terrain The maximum vehicle climbing ability is a 100% grade which is equivalent to a slope angle of 45 degrees. Keep in mind that the climbing ability of the vehicle depends on terrain conditions. Be easy on the accelerator and watch for continuous wheel traction when driving in steep terrain.

i The 4-ETS helps greatly when starting out on a steep incline when the front wheels have then the tendency to slip due to the weight shifting towards the rear axle. The 4-ETS recognizes the situation and limits the torque for the front wheels by braking them. Simultaneously the torque for the rear wheels is increased.

Driving across a hilltop Decelerate just ahead of a hilltop (do not shift automatic transmission to position N), to prevent the vehicle from speeding up too much after climbing a hill. Use the momentum of the vehicle to drive across the hilltop. After climbing a hill, driving in this manner prevents the vehicle from: 앫 losing ground contact when cresting

hills

앫 losing its forward momentum 앫 speeding up too much after climbing

the hill

Driving downhill 앫 Drive slowly. 앫 Do not drive at an angle to the incline. Steer into the line of gravity and drive with the front wheels pointing straight downhill. Otherwise, the vehicle may slide sideways off the path and roll over.

앫 Shift automatic transmission to

position 1 (컄 page 200).

앫 On steep inclines, use the Downhill

Speed Regulation (컄 page 275).

앫 Utilize the engine’s braking power to

reduce vehicle speed. If this is insufficient, apply the brake gently. Make sure the vehicle is moving in the line of gravity.

앫 Check the brakes after a lengthy down-

grade drive.

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Operation Driving instructions

i The special Off-road – ABS (컄 page 104) setting allows for precise and brief (cyclical) blocking of the front wheels, permitting them to dig into loose ground. Remember that, when stopped, the front wheels slide across a surface and thus lose their ability to steer the vehicle.

Driving through water

1 Fording depth

362

Vehicles with air suspension package Raised level

Vehicles with enhanced off-road package* Off-road 3 level Off-road 2 level Off-road 1 level

20.00 in (50 cm)

23.60 in (60 cm) 20.00 in (50 cm) 20.00 in (50 cm)

앫 Before driving through water, deter-

mine its depth.

! The water depth must not exceed the respective value listed in the table. The ground under the water might not be firm which could result the water being deeper than expected when driving the vehicle through it. Please note that the water level is correspondingly lower for flowing water.

앫 Select the highest vehicle level

possible (컄 page 281).

앫 Switch to off-road driving program

(컄 page 279) or LOW RANGE mode* (컄 page 203) before driving through water.

앫 Shift automatic transmission to

position 1 or 2 (컄 page 200).

앫 Avoid high engine speeds. 앫 Enter and leave the water only at a

shallow spot, driving at walking speed.

! Never accelerate before driving into the water. The bow wave could force water into the engine and auxiliary equipment, thus damaging them. 앫 Drive through the water slowly and at a

constant speed.

앫 Do not stop vehicle while immersed in water, and do not shut off the engine.

Crossing obstacles

! Do not open any of the vehicle’s doors while driving through water. Water could otherwise en- ter the vehicle interior and damage the vehicle’s electronics, as well as the interior equipment. 앫 There is a very high level of driving re- sistance in water. The surface is slip- pery and may not be firm, making pulling away in water difficult and dan- gerous.

앫 Make sure that only small bow waves

are formed when driving the vehicle through water.

앫 Clean mud off the tire tread after driv-

ing through water.

앫 To dry the brakes, apply pressure to the brake pedal several times while driving after leaving the water.

! Obstacles can damage the vehicle underbody or suspension components. If possi- ble use the assistance of a second person out- side the vehicle to scout the path you intend to take and check for adequate ground clearance when you cross obstacles with your vehicle. The person assisting you outside the vehicle should always be a safe distance away from the vehicle and positioned so that he or she cannot get hurt in case of any unexpected vehicle movement. After off-road driving or crossing obstacles, in- spect vehicle for any damage, especially vehicle underbody and suspension components. Failure to do so can adversely affect the vehicle’s future performance, including increased chance of an accident.

Operation Driving instructions

When driving over tree stumps, big rocks and other obstacles, observe the following rules: 앫 Make sure the off-road driving program

(컄 page 279) or if equipped the LOW RANGE mode* (컄 page 203) is switched on.

앫 Avoid high engine speeds. 앫 Shift automatic transmission to

position 1 (컄 page 200).

앫 Check the vehicle clearance before

crossing obstacles.

앫 Cross obstacles (e.g. tree stumps or

big rocks) very slowly by aiming one of the front wheels at the center of the ob- stacle, and repeat same with the rear wheel.

! Special attention is needed when you cross obstacles on a steep incline. The vehicle could slide sideways as a result of its possible slanted position which in turn may result in the vehicle tipping or rolling over.

363

Operation Driving instructions

Driving on sand

Warning!

Do not reduce the tire inflation pressure before driving through sand. However, if you do so, remember to correct the tire inflation pressure (컄 page 396) before continuing your trip. Driving with reduced tire inflation pressure increases the risk of losing control of the vehicle and rolling over.

When driving on sand, observe the follow- ing rules: 앫 Set the raised level (컄 page 281). 앫 Avoid high engine speeds. 앫 Shift automatic transmission into a

gear range that is appropriate for the terrain.

364

앫 In sandy soil, drive at a steady speed as conditions permit. This helps overcome the vehicle rolling resistance and re- duce the likelihood of the vehicle sink- ing into the ground.

앫 Drive in tracks of other vehicles if they

are not too deep and you have suffi- cient clearance.

Ruts A number of off-road tracks or other by- ways have deep ruts which can cause the underbody to come in contact with the ground. 앫 Make sure the off-road driving program (컄 page 279), or if equipped, the LOW RANGE mode* (컄 page 203) is switched on.

앫 Set the raised level (컄 page 281).

! Check that the ruts are not too deep and your vehicle’s clearance is sufficient. Otherwise: 앫 your vehicle may be damaged 앫 the underbody of the vehicle may come in contact with the ground and you may get stuck

앫 Avoid high engine speeds. 앫 Shift automatic transmission to

position 1 (컄 page 200).

앫 Drive next to the ruts rather than

through them if at all possible.

앫 If the ruts are too deep to drive in, drive

with one side of the vehicle on the grassy center strip if the route permits.

Returning from off-road driving

Warning!

If you feel a sudden significant vibration or ride disturbance, or you suspect that possi- ble damage to your vehicle has occurred, you should turn on the hazard warning flash- ers, carefully slow down, and drive with cau- tion to an area which is a safe distance from the roadway.

Inspect the tires and under the vehicle for possible damage. If the vehicle or tires ap- pear unsafe, have it towed to the nearest Mercedes-Benz Light Truck Center or tire dealer for repairs.

Damage to the vehicle may influence driving comfort and pose the risk of accident to you and other drivers.

Off-road driving increases strain on the vehicle. We recommend that you inspect the vehi- cle for possible damage after each off-road trip. Recognizing any damage and a subse- quent timely repair reduces the chance of a possible breakdown or accident later on. Proceed as follows: 앫 Switch off the off-road driving program

(컄 page 280) or the LOW RANGE mode* (컄 page 203).

앫 Switch off the DSR (컄 page 276). 앫 Set the differential locks* to AUTO

(컄 page 207).

앫 Lower the vehicle back to a level

suitable for road conditions, e.g. High- way/High-speed level (컄 page 281).

앫 Clean all exterior lamps and check for

possible damage.

Operation Driving instructions

앫 Clean the front and rear license plate. 앫 Remove excessive dirt from tires,

wheels, wheel housings, and under- body. For instance, after driving in mud, clean the radiator, chassis, engine, brakes, and wheels from extreme dirt using a strong jet of water.

앫 Check tires for possible damage. 앫 Inspect vehicle underbody, oil pan,

brake hoses, etc., as well as vehicle un- derbody for possible damage.

앫 Check for brush or branches caught in

the underbody.

! Brush or branches could increase the possi- bility of a fire, as well as cut fuel and/or brake lines, puncture rubber bellows of the axles or drive shafts. 앫 After continued operation in mud,

sand, water or other dirty conditions clean the brake discs, wheels, brake pads and check and clean axle joints.

앫 Conduct a brake test.

365

Operation Driving instructions

Trailer towing

Warning!

Failure to use proper equipment and driving technique can result in a loss of vehicle con- trol when towing a trailer.

Improper towing or failure to follow the in- structions in this manual can result in vehi- cle damage and/or serious personal injury. Follow the guidelines below carefully to as- sure safe trailer operation.

Contact an authorized Mercedes-Benz Light Truck Center should you require an explana- tion of information contained in this manual.

Trailer hitch* 앫 Only install a trailer hitch receiver ap-

proved for your vehicle. For information on availability and in- stallation, contact an authorized Mercedes-Benz Light Truck Center.

앫 The bumpers on your vehicle are not

designed for use with clamp-type hitch- es. Do not attach rental hitches or other bumper-type hitches to them.

앫 To reduce the possibility of damage, re-

move the hitch ball adaptor from the receiver when not in use.

Electrical connections The vehicle is prewired to accept the seven-wire harness included in the Mercedes-Benz approved trailer hitch receiver kit.

i A four-pole conversion plug is available from your authorized Mercedes-Benz Light Truck Center as a spare part.

For further information, contact an autho- rized Mercedes-Benz Light Truck Center.

Vehicle and trailer weights and ratings Gross Vehicle Weight Rating (GVWR) is the maximum permissible vehicle weight: 6944 lb (3150 kg). Gross Vehicle Weight (GVW): Comprises weight of vehicle including fuel, tools, spare wheel, installed accessories, passengers, cargo and trailer tongue. It must never exceed the GVWR.

366

Gross Axle Weight Rating (GAWR) is the maximum permissible axle weight:

Front Rear

Front Rear

GL 320 CDI 3306 lb (1500 kg) 3968 lb (1800 kg)

GL 450
3240 lb (1470 kg) 3968 lb (1800 kg)

The Gross Trailer Weight (GTW) is the weight of the trailer plus the weight of all cargo, equipment, luggage etc. loaded on the trailer. The maximum permissible gross trailer weight to be towed: 7500 lb (3402 kg). Trailer Tongue Weight Rating (TWR) is the maximum permissible weight on the trailer tongue: 600 lb (272 kg) limit for Mercedes-Benz approved hitch receiver.

Loading a trailer 앫 When loading a trailer, you should ob- serve that neither the permissible GTW, nor the GVWR are exceeded. Maximum permissible values are listed on the safety compliance certification labels for the vehicle and for the trailer to be towed. The lowest value listed must be select- ed when determining how the vehicle and trailer are loaded.

앫 The tongue weight at the hitch ball

must be added to the GVW to prevent exceeding your Mercedes-Benz tow vehicle’s rear GAWR.

i We recommend loading the trailer in such a manner that it has a Tongue Weight (TW) between 8% and 15% of the Gross Trailer Weight (GTW).

i Maximum trailer weight ratings are calculat- ed assuming the vehicle, plus driver. The weight of other accessories, passengers and cargo will reduce the maximum trailer weight and Tongue Weight (TW) your vehicle can tow.

Operation Driving instructions

Checking weights of vehicle and trailer 앫 To assure that the tow vehicle and trail- er are in compliance with the maximum permissible weight limits have the load- ed rig (tow vehicle including driver, pas- sengers and cargo, trailer fully loaded) weighed on a commercial scale.

앫 Check the vehicle’s front and rear

Gross Axle Weight (GAW), the Gross Trailer Weight (GTW) and Tongue Weight (TW). The values as measures must not exceed the weight limits listed under “Vehicle and trailer weight and ratings” (컄 page 366).

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Operation Driving instructions

Attaching a trailer

Warning!

While you are coupling or decoupling a trail- er, make sure that you do not 앫 lock or unlock 앫 open or close a vehicle door or the tailgate. The vehicle’s level could change and you could endanger yourself and/or others as a result.

Make sure that you do not operate the ADS button* (컄 page 281) or the vehicle level control system (컄 page 281) when cou- pling/decoupling the trailer.

368

Observe maximum permitted trailer dimensions (width and length). Most states and all Canadian provinces require 앫 safety chains between your tow vehicle

and the trailer. The chains should be criss-crossed under the trailer tongue. They must be attached to the hitch receiver, and not to the vehicle’s bumper or axle. Make sure to leave enough slack in the chains to permit turning corners.

앫 a separate brake system at various

trailer weights.

앫 a break-away switch on trailers with a

separate brake system. Check with your local state laws for specific requirements. The switch activates the trailer brakes in the possible event that the trailer might separate from the tow vehicle.

! Do not connect a trailer brake system (if trailer is so equipped) directly to the vehicle’s hydraulic brake system, as your vehicle is equipped with antilock brakes. If you do, neither the vehicle’s brakes nor the trailer’s brakes will function properly.

i The provided vehicle electrical connector for trailer towing has a brake signal wire for hook-up to a brake controller. You should consider using a trailer sway control system. For further information, contact an authorized Mercedes-Benz Light Truck Center. 왘 Make sure the automatic transmission

is set to P (컄 page 194).

왘 Set the parking brake for the vehicle

(컄 page 68).

왘 Start the engine (컄 page 57). 왘 Set the vehicle level to Highway

(컄 page 281).

왘 Vehicle with ADS*: Set the ADS* to

AUTO or COMFORT (컄 page 280).

왘 Turn off the engine (컄 page 69).

왘 Close all doors and the tailgate. 왘 Attach the trailer. 왘 Plug in all electrical connectors.

i When you are towing a trailer, the vehicle level always remains in the Highway setting. The following applies additionally when towing a trailer: 앫 The vehicle is lowered to the highway level when it reaches a speed of 5 mph (8 km/h) if not set to highway level.

앫 The high-speed level is not available. The restrictions that apply to towing also apply when using accessories that are connected to the trailer power socket, such as a bicycle rack.

Note the following points, when driving with the trailer: 앫 In order to gain skill and an understand-

ing of the vehicle’s behavior, you should practice turning, stopping and backing up in an area which is free from traffic.

앫 Before you start driving check the

앫 trailer hitch 앫 break-away switch 앫 safety chains 앫 electrical connections 앫 lighting and tires

Towing a trailer There are many different laws, including speed limit restrictions, having to do with trailer towing. Make sure your rig will be le- gal, not only for where you reside, but also for where you will be driving. A good source for this information can be the po- lice or local authorities.

앫 Adjust the mirrors (컄 page 52) to

permit unobstructed view beyond rear of trailer.

앫 If the trailer has electric brakes, start your vehicle and trailer moving slowly, and then apply only the trailer brake controller by hand to make sure the brakes are working properly.

Operation Driving instructions

앫 Always secure items in the trailer to

prevent load shifts while driving.

앫 When towing a trailer, check occasion-

ally to make sure the load is secure, and that lighting and trailer brakes (if so equipped) are functioning properly. 앫 Take into consideration that when tow- ing a trailer, the handling characteris- tics are different and less stable from those when operating the vehicle with- out a trailer. It is important to avoid sudden maneu- vers.

앫 The vehicle and trailer combination is heavier, and therefore is limited in ac- celeration and climbing ability, and re- quires longer stopping distances. It is more prone to reacting to cross wind gusts, and requires more sensi- tive steering input.

앫 If possible, do not brake abruptly, but rather engage the brake slightly at first to permit the trailer to activate its brake. Then increase the braking force.

369

Operation Driving instructions

! If the trailer should begin to sway, reduce the vehicle’s speed immediately. In no case attempt to straighten out the tow vehicle and trailer by increasing the speed. 앫 If the transmission repeatedly shifts between gears on inclines, manually shift to a lower gear (select 4, 3, 2 or 1) (컄 page 200). A lower gear and reduction of speed re- duces the chance of engine overload- ing and/or overheating.

앫 On very steep inclines, not manageable

with automatic transmission in 1, switch on off-road driving program (컄 page 280) or LOW RANGE mode* (컄 page 203).

앫 When going down a long hill, shift into a lower gear and use the engine’s brak- ing effect. Avoid riding the brakes, thus overheat- ing the vehicle and trailer brakes.

370

앫 If the engine coolant rises to an ex-

Uncoupling the trailer

tremely high temperature (coolant tem- perature needle approaching the red zone) when the air conditioning is on, turn off the air conditioning system. Engine coolant heat can be additionally vented by opening the windows, switching the climate control fan speed to high and setting the temperature control to the maximum hot position.

앫 Extreme care must be exercised since your vehicle with a trailer will require additional passing distance ahead than when driving without a trailer. Because your vehicle and trailer is longer than your vehicle alone, you will also need to go much farther ahead of the passed vehicle before you can re- turn to your lane.

Warning!

While you are coupling or decoupling a trail- er, make sure that you do not 앫 lock or unlock 앫 open or close a vehicle door or the tailgate. The vehicle’s level could change and you could endanger yourself and/or others as a result.

Make sure that you do not operate the ADS button* (컄 page 281) or the vehicle level control system (컄 page 281) when cou- pling/decoupling the trailer.

왘 Make sure the automatic transmission

is set to P (컄 page 194).

왘 Set the parking brake for the vehicle

(컄 page 68).

왘 Start the engine (컄 page 57). 왘 Close all doors and the tailgate. 왘 Set the parking brake for the trailer.

When you uncouple the trailer, the vehicle is temporarily raised because the springs are relieved of load. Be especially careful during this process, as you could otherwise injure yourself and/or others. Make sure that any persons remaining in the vehicle do not press the switches for vehicle level control or the ADS*.

Warning!

왘 Disconnect all electrical plug connec-

tors.

As soon as you disconnect the electrical connection between the trailer and the vehicle, the vehicle will lower. To help avoid personal injury, make sure no one is near the wheel housing or underneath the vehicle before the electrical connection is discon- nected.

왘 Uncouple the trailer. 왘 Make sure that the trailer coupling is

free of load.

왘 Turn off the engine (컄 page 69).

Operation Driving instructions

Passenger compartment

Warning!

Always fasten items being carried as secure- ly as possible.

In an accident, during hard braking or sud- den maneuvers, loose items will be thrown around inside the vehicle, and cause injury to vehicle occupants unless the items are securely fastened in the vehicle.

The rear cargo compartment is the preferred place to carry objects. Always use tie down rings, and if so equipped, always use the cargo net* when transporting cargo. The cargo net* cannot secure hard or heavy ob- jects. Always fasten items being carried as securely as possible using the cargo tie-down rings in the cargo floor area and fastening materials.

371

Operation Driving instructions

Driving abroad

Abroad, there is an extensive Mercedes-Benz service network at your disposal. If you plan to drive into areas which are not listed in the index of your Mercedes-Benz Light Truck Center directory, you should request pertinent information from an authorized Mercedes-Benz Light Truck Center.

372

Control and operation of radio transmitters

Telephones and two-way radios

COMAND system, radio and telephone*

Warning!

Do not forget that your primary responsibili- ty is to drive the vehicle. Only operate the COMAND system, radio or telephone1 if road, weather and traffic conditions permit.

Bear in mind that at a speed of just 30 mph (approximately 50 km/h), your vehicle is covering a distance of 44 feet (approximate- ly 14 m) every second.

1 Observe all legal requirements.

Warning!

Never operate radio transmitters equipped with a built-in or attached antenna (i.e. with- out being connected to an external antenna) from inside the vehicle while the engine is running. Doing so could lead to a malfunc- tion of the vehicle’s electronic system, possibly resulting in an accident and/or personal injury.

Radio transmitters, such as a portable telephone or a citizens band unit should only be used inside the vehicle if they are connected to an antenna that is installed on the outside of the vehicle. Refer to the radio transmitter operation instructions regarding use of an external antenna.

Operation Driving instructions

Catalytic converter (gasoline engine)

Your Mercedes-Benz is equipped with monolithic-type catalytic converters, an important element in conjunction with the oxygen sensors to achieve substantial con- trol of the pollutants in the exhaust emis- sions. Keep your vehicle in proper operating condition by following our rec- ommended maintenance instructions as outlined in your Maintenance Booklet.

! To prevent damage to the catalytic convert- ers, use only premium unleaded gasoline in this vehicle. Any noticeable irregularities in engine operation should be repaired promptly. Otherwise, exces- sive unburned fuel may reach the catalytic con- verter, causing it to overheat and potentially start a fire.

Warning!

Warning!

As with any vehicle, do not idle, park or op- erate this vehicle in areas where combusti- ble materials such as grass, hay or leaves can come into contact with the hot exhaust system, as these materials could be ignited and cause a vehicle fire.

As with any vehicle, do not idle, park or op- erate this vehicle in areas where combusti- ble materials such as grass, hay or leaves can come into contact with the hot exhaust system, as these materials could be ignited and cause a vehicle fire.

Oxidation catalyst (diesel engine)

Emission control

Your vehicle is equipped with an oxidation catalyst, an important element in conjunc- tion with the oxygen sensors to achieve substantial control of the pollutants in the exhaust emissions. Keep your vehicle in proper operating condition by following our recommended maintenance instruc- tions as outlined in your Maintenance Booklet.

Certain engine systems serve to keep the toxic components of the exhaust gases within permissible limits required by law. These systems, of course, will function properly only when maintained strictly ac- cording to factory specifications. Any ad- justments on the engine should, therefore, be carried out only by qualified Mercedes-Benz Light Truck Center autho- rized technicians.

373

Coolant temperature

During severe operating conditions, e.g. stop-and-go traffic, the coolant tem- perature may rise close to approximately 248°F (120°C). The engine should not be operated with the coolant temperature above 248°F (120°C). Doing so may cause serious en- gine damage which is not covered by the Mercedes-Benz Limited Warranty.

Warning!

앫 Driving when your engine is overheated can cause some fluids, which may have leaked into the engine compartment to catch fire. You could be seriously burned.

앫 Steam from an overheated engine can cause serious burns which can occur just by opening the engine hood. Stay away from the engine if you see or hear steam coming from it.

Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.

Operation Driving instructions

Engine adjustments should not be altered in any way. Moreover, the specified service jobs must be carried out regularly accord- ing to Mercedes-Benz servicing require- ments. For details refer to the Maintenance Booklet.

Warning!

Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide (CO), and inhaling it can cause un- consciousness and possible death.

Do not run the engine in confined areas (such as a garage) which are not properly ventilated. If you think that exhaust gas fumes are entering the vehicle while driving, have the cause determined and corrected immediately. If you must drive under these conditions, drive only with at least one win- dow fully open at all times.

374

왔 At the gas station Refueling

Warning!

Gasoline and diesel fuels are highly flamma- ble and poisonous. They burn violently and can cause serious personal injury.

Never allow sparks, flame or smoking mate- rials near gasoline or diesel fuel!

Turn off the engine before refueling.

Whenever you are around gasoline or diesel fuel, avoid inhaling fumes and skin or cloth- ing contact, extinguish all smoking materi- als.

Direct skin contact with gasoline or diesel fuels and the inhalation of gasoline or diesel fuel vapors are damaging to your health.

Operation At the gas station

Warning!

i In case the central locking system does not release the fuel filler flap, see “Fuel filler flap” (컄 page 501).

Do not fill diesel tanks with gasoline. Do not mix diesel fuel with gasoline. Otherwise the fuel system and engine could be damaged. In addition, the vehicle could catch fire.

! Damage resulting from mixing gasoline with diesel is not covered by the Mercedes-Benz Limited Warranty.

! Diesel engine: When filling the diesel fuel tank using fuel containers, place a filling filter, a suede cloth or a clean flannel cloth as a filter. Otherwise, particles from the fuel container could clog the fuel lines and/or the diesel injec- tion system.

The fuel filler flap is located on the right-hand side of the vehicle towards the rear. Locking/unlocking the vehicle with the SmartKey or the SmartKey with KEYLESS-GO* automatically locks/unlocks the fuel filler flap.

왘 Turn off the engine

앫 by turning the SmartKey to

position 0 (컄 page 42). Remove the SmartKey from the starter switch.

앫 by pressing the KEYLESS-GO* start/stop button (컄 page 43). Open the driver’s door (with the driver’s door open, starter switch is now in position 0, same as SmartKey removed from starter switch).

컄컄

375

Operation At the gas station

컄컄

왘 Briefly push on fuel filler flap at the po-

sition indicated by the arrow. The fuel filler flap opens slightly.

왘 Open the fuel filler flap completely. 왘 Turn the fuel cap to the left and hold on to it until possible pressure is released.

왘 Take off the fuel cap.

! The fuel filler cap is tethered to the fuel filler neck. Do not drop the cap. It could damage the vehicle paint finish. 왘 To prevent fuel vapors from escaping into open air, fully insert filler nozzle unit.

왘 Only fill your tank until the filler nozzle unit cuts out – do not top off or over- fill.

376

Warning!

Overfilling of the fuel tank may create pres- sure in the system which could cause a gas discharge. This could cause the gas to spray back out when removing the fuel pump noz- zle, which could cause personal injury.

왘 Replace the fuel cap by turning it clockwise until it audibly engages.

i Make sure to close the fuel filler flap before locking your vehicle as the flap locking pin prevents closing after you have locked the vehicle. 왘 Close the fuel filler flap.

You should hear the latch close shut.

i Leaving the engine running and the fuel cap open can cause the yellow fuel tank reserve warning lamp to flash and the ? malfunction indicator lamp (USA only) or the ± malfunc- tion indicator lamp (Canada only) comes on. For more information, see “Practical hints” (컄 page 439).

i Gasoline engine: Only use premium unleaded gasoline with a min- imum Posted Octane Rating of 91 (average of 96 RON/86 MON). Information on gasoline quality can normally be found on the fuel pump. Please contact gas station personnel in case labels on the pump cannot be found. For more information on gasoline, see “Premium unleaded gasoline (gasoline engine)” (컄 page 563), see “Fuel requirements” (컄 page 563), and the Factory Approved Service Products pamphlet (USA only) or contact an authorized Mercedes-Benz Light Truck Center.

i Diesel engine: Only use commercially available vehicular ULTRA-LOW SULFUR DIESEL FUEL (15 ppm SULFUR MAXIMUM). Information on diesel quality can normally be found on the fuel pump. Please contact gas station personnel in case labels on the pump cannot be found. For more information on diesel fuels, refer to the Factory Approved Service Products pamphlet (USA only) or contact an authorized Mercedes-Benz Light Truck Center.

Low outside temperatures (diesel engine) To prevent malfunctions, diesel fuel with improved cold flow characteristics is of- fered in the winter months. Check with your fuel retailer.

! Do not fill the tank with gasoline. Do not blend diesel fuel with gasoline or kerosine. The fuel system and engine will otherwise be dam- aged, which is not covered by the Mercedes-Benz Limited Warranty.

i Diesel engine: If you have driven the vehicle until the tank is empty, the fuel system needs to be bled (컄 page 529).

! Diesel engine: The engine is more susceptible to wear and damage if you use 앫 marine diesel fuel 앫 heating oil 앫 additives The exhaust aftertreatment device will be seriously damaged if you use 앫 LOW SULFUR DIESEL FUEL

(500 ppm SULFUR MAXIMUM)

앫 any other diesel fuel with a sulfur content of

above 15 ppm

The use of such non-approved fuels and/or special additives is not covered by the Mercedes-Benz Limited Warranty.

Operation At the gas station

Check regularly and before a long trip

왘 Open the hood (컄 page 379).

Example GL 450 (GL 320 CDI similar) 1 Brake fluid 2 Coolant level 3 Windshield washer system and

headlamp cleaning system*

Engine oil level For more information on engine oil, see “Engine oil” (컄 page 381).

377

Operation At the gas station

Brake fluid

! If you find that the brake fluid in the brake fluid reservoir has fallen to the minimum mark or below, have the brake system checked for brake pad thickness and leaks immediately. Notify an authorized Mercedes-Benz Light Truck Center immediately. Do not add brake fluid as this will not solve the problem. For more information, see “Brake fluid” (컄 page 562).

Coolant For normal replenishing, use water (pota- ble water quality). For more information, see “Coolant level” (컄 page 382) and see “Fuels, coolants, lu- bricants” (컄 page 560).

Windshield/rear window washer system and headlamp cleaning system* For more information on refilling the wash- er reservoir, see “Windshield/rear window washer system and headlamp cleaning system*” (컄 page 384).

Vehicle lighting Check function and cleanliness. For infor- mation on replacing light bulbs, see “Re- placing bulbs” (컄 page 508). For more information, see “Exterior lamp switch” (컄 page 145).

Tire inflation pressure For more information, see “Checking tire inflation pressure” (컄 page 396).

378

Operation Engine compartment

왔 Engine compartment Hood

Warning!

Warning!

Warning!

Do not pull the release lever while the vehi- cle is in motion. Otherwise the hood could be forced open by passing air flow.

This could cause the hood to come loose and injure you and/or others.

You could be injured when the hood is open – even when the engine is turned off.

Parts of the engine can become very hot. To prevent burns, let the engine cool off com- pletely before touching any components on the vehicle. Comply with all relevant safety precautions.

Opening

Warning!

If you see flames or smoke coming from the engine compartment, or if the coolant tem- perature gauge indicates that the engine is overheated, do not open the hood. Move away from vehicle and do not open the hood until the engine has cooled. If necessary, call the fire department.

Warning!

To help prevent personal injury, stay clear of moving parts when the hood is open and the engine is running.

The radiator fan may continue to run for approximately 30 seconds or may even restart after the engine has been turned off. Stay clear of fan blades.

Vehicles with gasoline engine: The engine is equipped with a transistorized ignition system. Because of the high voltage it is dangerous to touch any components (ignition coils, spark plug sockets, diagnos- tic socket) of the ignition system 앫 with the engine running 앫 while starting the engine 앫 if ignition is “on” and the engine is

turned manually

Warning!

Vehicles with diesel engine: The engine is equipped with a high-voltage electronic control unit for the injection system. Because of the high voltage it is dangerous to touch any components of the injection system (injectors, electrical wires) 컄컄

379

Operation Engine compartment

컄컄

앫 with the engine running 앫 while starting the engine 앫 when the ignition is switched on

The hood lock release lever is located in the driver’s footwell.

1 Release lever 왘 Pull release lever 1 downwards.

The hood is unlocked. Handle 2 pro- trudes slightly from the radiator grille. If not, lift the hood slightly.

! To avoid damage to the windshield wipers or hood, never open the hood if the wiper arms are folded forward away from the windshield.

380

2 Handle for opening the hood 왘 Press and hold handle 2.

The hood is unlocked.

왘 Pull up on the hood in direction of ar-

row and then release it. The hood will be automatically held open at shoulder height by gas-filled struts.

Closing

Warning!

When closing the hood, use extreme caution not to catch hands or fingers. Be careful that you do not close the hood on anyone.

Make sure that the hood is securely en- gaged before driving off. Do not continue driving if the hood can no longer engage af- ter an accident, for example. The hood could otherwise come loose while the vehicle is in motion and endanger you and others.

왘 Let the hood drop from a height of

approximately 1 ft (30 cm). The hood will lock audibly.

왘 Check to make sure the hood is fully

closed. If you can raise the hood at a point above the headlamps, then it is not properly closed. Open it again and let it drop with somewhat greater force.

Engine oil

The amount of oil your engine needs will depend on a number of factors, including driving style. Increased oil consumption can occur when 앫 the vehicle is new 앫 the vehicle is driven frequently at

higher engine speeds

Engine oil consumption checks should only be made after the vehicle break-in period.

i Do not use any special lubricant additives, as these may damage the drive assemblies. Using special additives not approved by Mercedes-Benz may cause damage not covered by the Mercedes-Benz Limited Warranty. More information on this subject is available at any Mercedes-Benz Light Truck Center.

Checking engine oil level with the oil dipstick When checking the oil level 앫 the vehicle must be parked on level

ground

앫 the vehicle must have been stationary for at least 5 minutes with the engine turned off

Example GL 450 (GL 320 CDI similar) 1 Oil dipstick 2 Upper mark 3 Lower mark

Operation Engine compartment

왘 Open the hood (컄 page 379). 왘 Pull out oil dipstick 1. 왘 Wipe oil dipstick 1 clean. 왘 Fully insert oil dipstick 1 into the

dipstick guide tube.

왘 Pull out oil dipstick 1 again after approximately 3 seconds to obtain accurate reading. The oil level is correct when it is be- tween lower mark 3 (min.) and upper mark 2 (max.) of the oil dipstick.

i The filling quantity between the upper and lower marks on the oil dipstick is approximately 2.1 US qt. (2.0 l). 왘 If necessary, add engine oil

(컄 page 382).

For more information on engine oil, see “Technical data” section (컄 page 560) and (컄 page 562).

381

Operation Engine compartment

Adding engine oil

! Only use approved engine oils and oil filters required for vehicles with Maintenance System. For a listing of approved engine oils and oil filters, refer to the Factory Approved Service Products pamphlet (USA only) in your vehicle literature portfolio, or contact an authorized Mercedes-Benz Light Truck Center. Using engine oils and oil filters of specification other than those expressly required for the Maintenance System, or changing of oil and oil filter at change intervals longer than those called for by the Maintenance System will result in engine or emission control system damage not covered by the Mercedes-Benz Limited Warranty.

382

왘 Screw filler cap 1 back on filler neck. For more information on engine oil, see “Technical data” section (컄 page 560) and (컄 page 562).

Transmission fluid level

The transmission fluid level does not need to be checked. If you notice transmission fluid loss or gear shifting malfunctions, have an authorized Mercedes-Benz Light Truck Center check the automatic trans- mission.

Coolant level

The engine coolant is a mixture of water and anticorrosion/antifreeze. To check the coolant level, the vehicle must be parked on level ground.

Example GL 450 (GL 320 CDI similar) 1 Filler cap 왘 Unscrew filler cap 1 from filler neck. 왘 Add engine oil as required. Never over-

fill with oil.

Be careful not to spill any oil when adding. Avoid environmental damage caused by oil entering the ground or water.

! Excess oil must be siphoned or drained off. It could cause damage to the engine and/or catalytic converter (gasoline engine) or the oxi- dation catalyst (diesel engine) not covered by the Mercedes-Benz Limited Warranty.

Warning!

In order to avoid potentially serious burns: 앫 Use extreme caution when opening the hood if there are any signs of steam or coolant leaking from the cooling system, or if the coolant temperature gauge indi- cates that the coolant is overheated.

앫 Do not remove pressure cap on coolant

reservoir if coolant temperature is above 158°F (70°C). Allow engine to cool down before removing cap. The coolant reservoir contains hot fluid and is under pressure.

앫 Using a rag, slowly open the cap approx- imately 1/2 turn to relieve excess pres- sure. If opened immediately, scalding hot fluid and steam will be blown out un- der pressure.

앫 Do not spill antifreeze on hot engine

parts. Antifreeze contains ethylene gly- col which may burn if it comes into con- tact with hot engine parts.

Operation Engine compartment

The coolant expansion tank is located on the driver’s side of the engine compart- ment.

왘 Using a rag, turn cap 1 slowly approx- imately one half turn counterclockwise to release any excess pressure.

1 Cap 2 Coolant expansion tank 3 Indicator wall 4 Coolant level

왘 Continue turning cap 1 counterclock-

wise and remove it. Coolant level 4 is correct if the level: 앫 for cold coolant: reaches the top of indicator wall 3 visible through the filling opening

앫 for warm coolant: is approximately

0.6 in (1.5 cm) higher 왘 Add coolant as required. 왘 Replace and tighten cap 1. For more information on coolant, see “Coolants” (컄 page 565).

383

! Only use washer fluid which is suitable for plastic lenses. Improper washer fluid can damage the plastic lenses of the headlamps.

For more information, see “Windshield washer system and headlamp cleaning system*” (컄 page 567).

Operation Engine compartment

Windshield/rear window washer system and headlamp cleaning system*

The windshield washer reservoir is located in the engine compartment.

1 Cap for windshield washer reservoir Fluid for the windshield/rear window washer system and the headlamp cleaning system* is supplied from the windshield washer reservoir. It has a capacity of 8.1 US qt (7.7 l).

384

During all seasons, add MB Windshield Washer Concentrate “MB SummerFit” to water. Premix the windshield washer fluid in a suitable container.

Warning!

Washer solvent/antifreeze is highly flamma- ble. Do not spill washer solvent/antifreeze on hot engine parts, because it may ignite and burn. You could be seriously burned.

왘 Use the tab to pull cap 1 upwards. 왘 Refill the reservoir with MB Windshield Washer Concentrate “MB SummerFit” and water (or commercially available premixed windshield washer sol- vent/antifreeze, depending on ambient temperatures).

! Always use washer solvent/antifreeze where temperatures may fall below freezing point. Failure to do so could result in damage to the washer system/reservoir.

왔 Tires and wheels Contact an authorized Mercedes-Benz Light Truck Center for information on test- ed and recommended rims and tires for summer and winter operation. They can also offer advice concerning tire service and purchase.

Warning!

Replace rims or tires with the same designa- tion, manufacturer and type as shown on the original part. Contact an authorized Mercedes-Benz Light Truck Center for fur- ther information. If incorrectly sized rims and tires are mounted: 앫 The wheel brakes or suspension

components can be damaged.

앫 The operating clearance of the wheels and the tires may no longer be correct.

Warning!

Worn, old tires can cause accidents. If the tire tread is badly worn, or if the tires have sustained damage, replace them.

When replacing rims, only use genuine Mercedes-Benz wheel bolts specified for the particular rim type. Failure to do so can result in the bolts loosening and possibly an accident.

Retreaded tires are not tested or recom- mended by Mercedes-Benz, since previous damage cannot always be recognized on re- treads. The operating safety of the vehicle cannot be assured when such tires are used.

Operation Tires and wheels

Important guidelines

앫 Only use sets of tires and rims of the

same type and make.

앫 Tires must be of the correct size for the

rim.

앫 Break in new tires for approximately

60 miles (100 km) at moderate speeds.

앫 Regularly check the tires and rims for

damage. Dented or bent rims can cause tire inflation pressure loss or damage to the tire beads.

앫 If vehicle is heavily loaded, check tire

inflation pressure and correct as required.

앫 Do not allow your tires to wear down too far. Adhesion properties on wet roads are sharply reduced at tread depths of less than 1/8 in (3 mm). 앫 When replacing individual tires, you should mount new tires on the front wheels first (on vehicles with same-sized wheels all around).

385

Tire inspection Every time you check your tire inflation pressure, you should also inspect your tires for the following: 앫 excessive treadwear (컄 page 387) 앫 cord or fabric showing through the

tire’s rubber

Life of tire The service life of a tire is dependent upon varying factors including but not limited to: 앫 Driving style 앫 Tire inflation pressure 앫 Distance driven

앫 bumps, bulges, cuts, cracks or splits in

the tread or side of the tire

Warning!

Tires and spare tire should be replaced after 6 years, regardless of the remaining tread.

Replace the tire if you find any of the above conditions. Make sure you also inspect the spare tire periodically for condition and inflation. Spare tires will age and become worn over time even if never used, and thus should be inspected and replaced when necessary.

Operation Tires and wheels

Tire care and maintenance

Warning!

Regularly check the tires for damage. Dam- aged tires can cause tire inflation pressure loss. As a result, you could lose control of your vehicle.

Worn, old tires can cause accidents. If the tire tread is badly worn, or if the tires have sustained damage, replace them.

Regularly check your tire inflation pressure at least once a month. For more informa- tion on checking tire inflation pressure, see “Recommended tire inflation pres- sure” (컄 page 394).

386

Tread depth Do not allow your tires to wear down too far. Adhesion properties on wet roads are sharply reduced at tread depths of less than 1/8 in (3 mm). Treadwear indicators (TWI) are required by law. These indicators are located in six places on the tread circumference and become visible at a tread depth of approx- imately 1/16 in (1.6 mm), at which point the tire is considered worn and should be re- placed. Recommended minimum tire tread depth: 앫 Summer tires 1/8 in (3 mm) 앫 Winter tires 1/6 in (4 mm)

Warning!

Although the applicable federal motor safety laws consider a tire to be worn when the treadwear indicators (TWI) become visible at approximately 1/16 in (1.6 mm), we recom- mend that you do not allow your tires

to wear down to that level. As tread depth approaches 1/8 in (3 mm), the adhesion properties on a wet road are sharply reduced.

Depending upon the weather and/or road surface (conditions), the tire traction varies widely.

Operation Tires and wheels

Storing tires

! Keep unmounted tires in a cool, dry place with as little exposure to light as possible. Protect tires from contact with oil, grease and gasoline.

Cleaning tires

! Never use a round nozzle to power wash tires. The intense jet of water can result in damage to the tire. Always replace a damaged tire.

1 TWI (Tread Wear Indicator) The treadwear indicator appears as a solid band across the tread.

387

Operation Tires and wheels

Direction of rotation

Loading the vehicle

2) The certification label, also found on

Unidirectional tires offer added advantag- es, such as better hydroplaning perfor- mance. To benefit, however, you must make sure the tires rotate in the direction specified. An arrow on the sidewall indicates the intended direction of rotation (spinning) of the tire.

i Spare wheels may be mounted against the direction of rotation (spinning) even with a unidi- rectional tire for temporary use only until the reg- ular drive wheel has been repaired or replaced. Always observe and follow applicable temporary use restrictions and speed limitations indicated on the spare wheel.

Two labels on your vehicle show how much weight it may properly carry. 1) The Tire and Loading Information

placard can be found on the driver’s door B-pillar. This placard tells you im- portant information about the number of people that can be in the vehicle and the total weight that can be carried in the vehicle. It also contains information on the proper size and recommended tire inflation pressures for the original equipment tires on your vehicle.

the driver’s door B-pillar tells you about the gross weight capacity of your vehi- cle, called the Gross Vehicle Weight Rating (GVWR). The GVWR includes the weight of the vehicle, all occupants, fuel and cargo. The certification label also tells you about the front and rear axle weight capacity, called the Gross Axle Weight Rating (GAWR). The GAWR is the total allowable weight that can be carried by a single axle (front or rear). Never exceed the GVWR or GAWR for either the front axle or rear axle.

388

Tire and Loading Information

Warning!

Do not overload the tires by exceeding the specified load limit as indicated on the Tire and Loading Information placard on the driver’s door B-pillar. Overloading the tires can overheat them, possibly causing a blowout. Overloading the tires can also result in handling or steering problems, or brake failure.

Tire and Loading Information placard

i Data shown on Tire and Loading Information placard example are for illustration purposes only. Load limit data are specific to each vehicle and may vary from data shown in the illustration below. Refer to Tire and Loading Information placard on vehicle for actual data specific to your vehicle.

Operation Tires and wheels

1 Load limit information on the Tire and

Loading Information placard

The Tire and Loading Information placard showing the load limit information is located on the driver’s door B-pillar (컄 page 389). 왘 Locate the statement “The combined weight of occupants and cargo should never exceed XXX kilograms or XXX lbs.” on the Tire and Loading Infor- mation placard. The combined weight of all occupants, cargo/luggage and trailer tongue load (if applicable) should never exceed the weight referenced in that statement.

389

1 Driver’s door B-pillar Following is a discussion on how to work with the information contained on the Tire and Loading Information placard with regards to loading your vehicle.

Operation Tires and wheels

Seating capacity The seating capacity gives you important information on the number of occupants that can be in the vehicle. Observe front and rear seating capacity. The Tire and Loading Information placard showing the seating capacity is located on the driver’s door B-pillar (컄 page 389).

i Data shown on Tire and Loading Information placard example are for illustration purposes only. Seating data are specific to each vehicle and may vary from data shown in the illustration below. Refer to Tire and Loading Information placard on vehicle for actual data specific to your vehicle.

390

Step 1
왘 Locate the statement “The combined weight of occupants and cargo should never exceed XXX kg or XXX lbs.” on your vehicle’s Tire and Loading Information placard.

Step 2
왘 Determine the combined weight of the

driver and passengers that will be riding in your vehicle.

Step 3
왘 Subtract the combined weight of the

driver and passengers from XXX kilograms or XXX lbs.

1 Seating capacity information on the Tire and Loading Information placard.

Steps for determining correct load limit The following steps have been developed as required of all manufacturers under Title 49, Code of U.S. Federal Regulations, Part 575 pursuant to the “National Traffic and Motor Vehicle Safety Act of 1966”.

Step 4
왘 The resulting figure equals the avail-

Step 6 (if applicable) 왘 If your vehicle will be towing a trailer,

able amount of cargo and luggage load capacity. For example, if the “XXX” amount equals 1400 lbs and there will be five 150 lbs passengers in your vehicle, the amount of available cargo and luggage load capacity is 650 lbs (1400-750 (5 x150) = 650 lbs).

Step 5
왘 Determine the combined weight of

luggage and cargo being loaded on the vehicle. That weight may not safely exceed the available cargo and luggage load capacity calculated in step 4.

load from your trailer will be trans- ferred to your vehicle. Consult this manual to determine how this reduces the available cargo and luggage load capacity of your vehicle (컄 page 393).

The following table shows examples on how to calculate total and cargo load capacities with varying seating configura- tions and number and size of occupants. The following examples use a load limit of 1500 lbs. This is for illustration purposes only. Make sure you are using the actual load limit for your vehicle stated on the vehicle’s Tire and Loading Information placard (컄 page 389).

Operation Tires and wheels

391

Operation Tires and wheels

Example Combined

weight limit of occu- pants and cargo from placard 1500 lbs

1500 lbs

1500 lbs

Number of occupants (driver and passengers)

Seating configura- tion

Occupants weight

Combined weight of all occupants

Available cargo/luggage and trailer tongue weight (total load limit from placard minus combined weight of all occupants)

front: 2

rear: 3

front: 1
rear: 2

front:1

Occupant 1: 150 lbs Occupant 2: 180 lbs Occupant 3: 160 lbs Occupant 4: 140 lbs Occupant 5: 120 lbs Occupant 1: 200 lbs Occupant 2: 190 lbs Occupant 3: 150 lbs Occupant 1: 150 lbs

750 lbs

1500 lbs - 750 lbs = 750 lbs

540 lbs

1500 lbs - 540 lbs = 960 lbs

150 lbs

1500 lbs - 150 lbs = 1350 lbs

The higher the weight of all occupants, the less cargo and luggage load capacity is available. For more information, see “Trailer tongue load” (컄 page 393).

392

Certification label Even after careful determination of the combined weight of all occupants, cargo and the trailer tongue load (if applicable) (컄 page 393) as to not exceed the permis- sible load limit, you must make sure that your vehicle never exceeds the Gross Vehicle Weight Rating (GVWR) and the Gross Axle Weight Rating (GAWR) for ei- ther the front or rear axle. You can obtain the GVWR and GAWR from the certification label. The certification label can be found on the driver’s door B-pillar, see “Technical data” (컄 page 547).

Gross Vehicle Weight Rating (GVWR): The total weight of the vehicle, all occupants, all cargo, and the trailer tongue load (컄 page 393) must never exceed the GVWR. Gross Axle Weight Rating (GAWR): The to- tal allowable weight that can be carried by a single axle (front or rear). To assure that your vehicle does not ex- ceed the maximum permissible weight limits (GVWR and GAWR for front and rear axle), have the loaded vehicle (including driver, passengers and all cargo and, if applicable, trailer fully loaded) weighed on a suitable commercial scale.

Operation Tires and wheels

Trailer tongue load The tongue load of any trailer is an impor- tant weight to measure because it affects the load you can carry in your vehicle. If a trailer is towed, the tongue load must be added to the weight of all occupants riding and any cargo you are carrying in the vehicle. The tongue load typically is between 8% and 15% of the trailer weight and everything loaded in it. For more information on trailer tongue load, see “Loading a trailer” (컄 page 367).

393

Operation Tires and wheels

Recommended tire inflation pressure

Warning!

Follow recommended tire inflation pressures.

Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are more likely to fail from being over- heated.

Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are more likely to become punctured or damaged by road debris, potholes etc.

Do not overload the tires by exceeding the specified load limit as indicated on the Tire and Loading Information placard on the driver’s door B-pillar. Overloading the tires can overheat them, possibly causing a blowout. Overloading the tires can also result in handling or steering problems, or brake failure.

Your vehicle is equipped with the Tire and Loading Information placard located on the driver’s door B-pillar (컄 page 389). The tire inflation pressure should be checked regularly and should only be ad- justed on cold tires. The tires can be con- sidered cold if the vehicle has been parked for at least 3 hours or driven less than 1 mile (1.6 km).

Follow recommended cold tire inflation pressures listed on Tire and Loading Information placard on the driver’s door B-pillar. Keeping the tires properly inflated provides the best handling, tread life and riding comfort. In addition to the Tire and Loading Information placard on the driver’s door B-pillar, also consult the tire inflation pressure label (if available) on the fuel filler flap (컄 page 375) for any additional infor- mation pertaining to special driving situa- tions. For more information, see “Important notes on tire inflation pressure” (컄 page 395).

394

i Data shown on Tire and Loading Information placard example are for illustration purposes only. Tire data are specific to each vehicle and may vary from data shown in the illustration below. Refer to Tire and Loading Information placard on vehicle for actual data specific to your vehicle.

1 Tire and Loading Information placard with recommended cold tire inflation pressures

The Tire and Loading Information placard lists the recommended cold tire inflation pressures for maximum loaded vehicle weight. The tire inflation pressures listed apply to the tires installed as original equipment.

Important notes on tire inflation pressure

Warning!

If the tire inflation pressure drops repeatedly: 앫 Check the tires for punctures from

foreign objects.

앫 Check to see whether air is leaking from

the valves or from around the rim.

Tire temperature and tire inflation pressure are also increased while driving, depending on the driving speed and the tire load. If you will be driving your vehicle at high speeds of 100 mph (160 km/h) or higher, where it is legal and conditions allow, consult the tire inflation pressure label on the inside of the fuel filler flap (if available) on how to adjust the cold tire inflation pressure. If you do not adjust the tire infla- tion pressure, excessive heat can build up and result in sudden tire failure.

Operation Tires and wheels

If your vehicle is not equipped with the tire inflation pressure label on the inside of the fuel filler flap, contact an authorized Mercedes-Benz Light Truck Center for proper tire inflation pressure.

i Driving comfort may be reduced when the tire inflation pressure is adjusted to the value for speeds above 100 mph (160 km/h) as specified on the tire inflation pressure label located on the inside of the fuel filler flap.

Be sure to readjust the tire inflation pressure for normal driving speeds. You should wait until the tires are cold before adjusting the tire inflation pressure. Some vehicles may have supplemental tire inflation pressure information for vehicle loads less than the maximum loaded vehi- cle condition. If such information is provid- ed, it can be found on the tire inflation pressure label located on the inside of the fuel filler flap (컄 page 375).

395

Operation Tires and wheels

Tire inflation pressure changes by approxi- mately 1.5 psi (0.1 bar) per 18°F (10°C) of air temperature change. Keep this in mind when checking tire inflation pressure where the temperature is different from the outside temperature.

Checking tire inflation pressure

Regularly check your tire inflation pressure at least once a month. Check and adjust the tire inflation pressure when the tires are cold. The tires can be considered cold if the vehicle has been parked for at least 3 hours or driven less than 1 mile (1.6 km). If you check the tire inflation pressure when the tires are warm (the vehicle has been driven for several miles or sitting less than 3 hours), the reading will be approximately 4 psi (0.3 bar) higher than the cold reading. This is normal. Do not let air out to match the specified cold tire inflation pressure. Otherwise, the tire will be underinflated.

396

Checking tire inflation pressure manually Follow the steps below to achieve correct tire inflation pressure: 왘 Remove the cap from the valve on one

tire.

왘 Firmly press a tire gauge onto the

valve.

왘 Read tire inflation pressure on tire

gauge and check against the recom- mended tire inflation pressure on the Tire and Loading Information placard on the driver’s door B-pillar (컄 page 389) or, if available, the inside of the fuel filler flap. If necessary, add air to achieve the recommended tire in- flation pressure.

Warning!

Follow recommended tire inflation pressures.

Do not underinflate tires. Underinflated tires wear excessively and/or unevenly, adversely affect handling and fuel economy, and are more likely to fail from being over- heated.

Do not overinflate tires. Overinflated tires can adversely affect handling and ride comfort, wear unevenly, increase stopping distance, and result in sudden deflation (blowout) because they are more likely to become punctured or damaged by road debris, potholes etc.

Do not overload the tires by exceeding the