2008 Mercedes-benz GL Class Owners Manual

If ice has formed on the road, tire traction will be substantially reduced. Under such weather conditions, drive, steer and brake with extreme caution.

352

Mercedes-Benz recommends winter tires (컄 page 420) with a minimum tread depth of approximately 1/6 in (4 mm) on all four wheels for the winter season to make sure normal balanced handling characteristics. On packed snow, they can reduce your stopping distance compared to summer tires. Stopping distance, however, is still consid- erably greater than when the road is not covered with snow or ice. Exercise appro- priate caution.

! Avoid spinning of a drive wheel. This may cause serious damage to the drivetrain which is not covered by the Mercedes-Benz Limited Warranty.

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Tire speed rating

Regardless of the tire speed rating, local speed limits should be obeyed. Use prudent driving speeds appropriate to pre- vailing conditions.

Warning!

Even when permitted by law, never operate a vehicle at speeds greater than the maxi- mum speed rating of the tires.

Exceeding the maximum speed for which tires are rated can lead to sudden tire failure, causing loss of vehicle control and possibly resulting in an accident and/or serious injury and possible death, for you and for others.

An electronic speed limiter prevents your vehicle from exceeding a speed of 130 mph (210 km/h).

The factory equipped tires on your vehicle may have a tire speed rating above the maximum speed permitted by the electronic speed limiter. Make sure your tires have the required tire speed rating as specified for your vehicle in the “Technical data” section (컄 page 555), for example when purchasing new tires. For information on how to identify the tire speed rating on a tire’s sidewall, see “Tire size designation, load and speed rating” (컄 page 406). If you are uncertain about the correct reading of the information given on a tire’s sidewall, any authorized Mercedes-Benz Light Truck Center will be glad to assist you.

i For information on speed ratings for winter tires, see “Winter tires” (컄 page 420). For additional general information on tire speed markings on the tire sidewall, see “Tire speed rating” (컄 page 418).

Operation Driving instructions

Winter driving instructions

The most important rule for slippery or icy roads is to drive sensibly and to avoid abrupt acceleration, braking and steering maneuvers. Do not use the cruise control system under such conditions. When the vehicle is in danger of skidding, shift the automatic transmission to position N. Try to keep the vehicle under control by corrective steering action.

i For information on driving with snow chains, see “Snow chains” (컄 page 421).

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Operation Driving instructions

Warning!

On slippery road surfaces, never downshift in order to obtain braking action. This could result in drive wheel slip and reduced vehi- cle control. Your vehicle’s ABS will not pre- vent this type of control loss.

Do not engage the transfer case in position LOW when driving on ice or packed snow. At speeds below 18 mph (30 km/h) vehicle steering is adversely affected by the Off-road – ABS (컄 page 102).

Road salts and chemicals can adversely af- fect braking efficiency. Increased pedal force may become necessary to produce the normal brake effect. Depressing the brake pedal periodically when traveling at length on salt-strewn roads can bring road-salt-impaired braking efficiency back to normal.

354

If the vehicle is parked after being driven on salt-treated roads, the braking efficien- cy should be tested as soon as possible af- ter driving is resumed.

Warning!

Make sure not to endanger any other road users when carrying out these braking maneuvers.

Warning!

If the vehicle becomes stuck in snow, make sure that snow is kept clear of the exhaust pipe and from around the vehicle with the engine running. Otherwise, deadly carbon monoxide (CO) gases may enter vehicle in- terior resulting in unconsciousness and death.

To assure sufficient fresh air ventilation, open a window slightly on the side of the ve- hicle not facing the wind.

Warning!

The outside temperature indicator is not de- signed to serve as an ice-warning device and is therefore unsuitable for that purpose. In- dicated temperatures just above the freez- ing point do not guarantee that the road surface is free of ice.

For more information, see “Winter driving” (컄 page 420).

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Standing water

Off-road driving

! Do not drive through flooded areas or water of unknown depth. Before driving through water, determine its depth. Never accelerate before driving into water. The bow wave could force wa- ter into the engine and auxiliary equipment, thus damaging them. If you must drive through standing water, drive slowly to prevent water from entering the pas- senger compartment or the engine compart- ment. Water in these areas could cause 앫 damage to electrical components 앫 wiring of the engine or transmission or could result 앫 in water being ingested by the engine

through the air intake, causing severe inter- nal engine damage.

Any such damage is not covered by the Mercedes-Benz Limited Warranty. i Select the raised level (컄 page 279) before driving through standing water.

For more information, see “Driving through water” (컄 page 360).

Warning!

Do not load items on the crossbars*. It may cause instability during some maneuvers which could result in an accident.

Drive slowly in unknown terrain. This will make it easier to recognize unexpected ob- stacles and avoid damage to the vehicle.

To help avoid the vehicle rolling over, never turn it around on steep inclines. If the vehi- cle cannot complete the attempted climb, back it down in reverse gear.

Do not drive along the side of a slope. The vehicle might otherwise rollover. If in doing so the vehicle begins to show a tendency to roll, immediately steer into a line of gravity (straight up or downhill).

Never let the vehicle roll backwards in idle. You may lose control of the vehicle if you use only the service brake. For information on driving downhill, see “Driving downhill” (컄 page 360).

Operation Driving instructions

Warning!

Sand, dirt, mud and other material having friction property can cause exceptional wear and tear as well as brake failure.

Have the brakes checked for dirt build-up and cleaned. There is otherwise a risk that full braking power may not be available in an emergency.

Warning!

Please be aware that by raising the vehicle level, the center of gravity also rises. There- fore, always ensure that the vehicle level is as low as possible. With higher ride height the ESP® may activate earlier in certain situations.

355

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Operation Driving instructions

Read this chapter carefully before you be- gin off-road travel. Familiarize yourself with the vehicle char- acteristics and gear changing before you attempt any difficult terrain off-road driv- ing. We recommend that you start out with easy off-road travel.

356

Special driving features for off-road driving The following driving features are available for specific kind of operation: 앫 Off-road – ABS (컄 page 102) 앫 Off-road – ESP® (컄 page 106) 앫 Off-road – 4-ETS (컄 page 108) 앫 Hill start assist system (컄 page 196) 앫 LOW RANGE mode* (컄 page 201) 앫 Differential locks* (컄 page 204) 앫 Downhill Speed Regulation (DSR)

(컄 page 273)

앫 Off-road driving program (Vehicles

without enhanced off-road package*) (컄 page 277)

앫 Air suspension (컄 page 278)

Off-road driving rules 앫 Engage the off-road driving program (컄 page 277) or LOW RANGE mode* (컄 page 201) before driving under off-road conditions.

앫 If necessary, activate differential

locks* (컄 page 204).

앫 Make sure you select a vehicle level (컄 page 279) appropriate to the topo- graphical conditions. Always make sure the vehicle has enough ground clearance.

앫 Fasten items being carried as securely

as possible (컄 page 295).

앫 Always navigate gradients with the en- gine on and with the transmission en- gaged in a gear. Switch on the DSR (컄 page 274) to help maintain a preset speed.

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! Observe the following during off-road driving: 앫 Keep doors, tailgate, windows, and

tilt/sliding sunroof* closed whenever driving off-road.

앫 Adjust vehicle speed to condition of terrain. The more uneven, rutty and steeper the ter- rain, the lower the speed should be. Drive through water slowly at an even speed, avoiding a bow wave.

앫 Be especially careful when driving in un-

known territory. It may be necessary to get out of the vehicle and scout the path you in- tend to take.

앫 Watch out for obstacles, such as rocks,

holes, tree stumps and ruts.

앫 Before driving through water, determine its

depth.

앫 Do not stop vehicle while immersed in water,

and do not shut off the engine.

앫 In sandy soil, drive at a steady speed as al- lowed by conditions. This helps overcome the vehicle rolling resistance and reduces the likelihood of the vehicle sinking into the ground.

앫 Do not initiate jumps with the vehicle. It interrupts the forward momentum of the vehicle.

앫 Always drive onto slopes with the engine

running and the vehicle in gear.

앫 Do not shift automatic transmission to

position N.

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 395) before continuing your trip. Driving with reduced tire inflation pressure increases the risk of losing control of the vehicle and rolling over.

Operation Driving instructions

Checklist before off-road driving

Engine oil level 앫 Check the engine oil level with the oil

dipstick (컄 page 380). Only with a proper oil level can the vehicle obtain a trouble-free oil supply, even on steep gradients.

! If the engine oil level warning lamp (컄 page 473) comes on while driving, stop the vehicle in a safe location or as soon at is safe to do so. Check the engine oil level (컄 page 380). The engine oil level warnings should not be ignored. Extended driving with the symbol displayed could result in serious engine damage that is not covered by the Mercedes-Benz Limited Warranty.

357

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Operation Driving instructions

Tires 앫 Check the tread depth and maintain

specified tire inflation pressure (a placard with the recommended tire inflation pressures is located on the driver’s door B-pillar (컄 page 388)).

앫 Check tires for possible damage and

remove foreign objects.

앫 Replace missing valve caps.

Rims 앫 Dented or bent rims can cause tire in- flation pressure loss and damage the tire beads. For this reason, check and, if necessary, change rims before driv- ing off-road.

Vehicle tool kit 앫 Check if the vehicle jack (컄 page 492)

is functional.

앫 In all cases take the vehicle tool kit, a strong tow rope, a shovel and a small plank (to put under the vehicle jack on sandy soil) with you.

358

Driving in steep terrain

Slope angle 1 Overhang angle, front 2 Overhang angle, rear

Vehicles with air sus- pension program Raised level Highway

34° 29°

28° 23°

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

36° 34° 31° 29°

30° 28° 25° 23°

앫 Comply with the warnings

(컄 page 355) and rules for off-road driving (컄 page 356).

앫 Driving on embankments, slopes and

other steep inclines should only be done straight up or downhill, i.e. in the line of gravity. Maximum vehicle climb- ing 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.

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Operation Driving instructions

앫 Shift automatic transmission to

position 1 (컄 page 197).

앫 Drive slowly. 앫 Avoid excessive engine speeds – drive

with moderate engine speeds (max. 3000 rpm).

앫 Utilize the engine’s braking power

when descending a slope, observe the engine speed (do not overrev the en- gine). Apply the service brake as need- ed.

i For maximum engine speed, see “Instru- ment cluster” (컄 page 26) and see “Engine” (컄 page 553). 앫 Check the brakes after a lengthy down-

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.

i The hill start assist system supports you when driving uphill. For more information, see “Hill start assist sys- tem” (컄 page 196).

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

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Operation Driving instructions

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 197).

앫 On steep inclines, use the Downhill

Speed Regulation (컄 page 273).

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.

360

i The special Off-road – ABS (컄 page 102) 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

Vehicles with air suspension program 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.

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앫 Select the highest vehicle level

possible (컄 page 279).

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

Crossing obstacles

Operation Driving instructions

앫 Switch to off-road driving program

(컄 page 277) or LOW RANGE mode* (컄 page 201) before driving through water.

앫 Shift automatic transmission to

position 1 or 2 (컄 page 197).

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.

! 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.

361

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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 277) or if equipped the LOW RANGE mode* (컄 page 201) is switched on.

앫 Avoid high engine speeds. 앫 Shift automatic transmission to

position 1 (컄 page 197).

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.

362

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 395) 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 279). 앫 Avoid high engine speeds. 앫 Shift automatic transmission into a

gear range that is appropriate for the terrain.

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 277), or if equipped, the LOW RANGE mode* (컄 page 201) is switched on.

앫 Set the raised level (컄 page 279).

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! 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 197).

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.

Operation Driving instructions

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 278) or the LOW RANGE mode* (컄 page 201).

앫 Switch off the DSR (컄 page 274). 앫 Set the differential locks* to AUTO

(컄 page 205).

앫 Lower the vehicle back to a level

suitable for road conditions, e.g. High- way/High-speed level (컄 page 279).

앫 Clean all exterior lamps and check for

possible damage.

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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.

364

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.

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Operation Driving instructions

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.

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, GL 550
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.

365

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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 365).

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 279) or the vehicle level control system (컄 page 279) when cou- pling/decoupling the trailer.

366

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.

164.boo Seite 367 Freitag, 30. März 2007 12:54 12

! 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 191).

왘 Set the parking brake for the vehicle

(컄 page 67).

왘 Start the engine (컄 page 56). 왘 Set the vehicle level to Highway

(컄 page 279).

왘 Vehicle with ADS*: Set the ADS* to

AUTO or COMFORT (컄 page 278).

왘 Turn off the engine (컄 page 68).

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.

Operation Driving instructions

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 51) 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.

367

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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.

368

! 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 197). 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 278) or LOW RANGE mode* (컄 page 201).

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.

앫 If the engine coolant rises to an ex-

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.

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Operation Driving instructions

Uncoupling the 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 279) or the vehicle level control system (컄 page 279) when cou- pling/decoupling the trailer.

왘 Make sure the automatic transmission

is set to P (컄 page 191).

왘 Set the parking brake for the vehicle

(컄 page 67).

왘 Start the engine (컄 page 56). 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 68).

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Operation Driving instructions

Passenger compartment

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.

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.

370

Control and operation of radio transmitters

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.

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Telephones and two-way radios

Catalytic converter (gasoline engine)

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.

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.

Operation Driving instructions

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.

Oxidation catalyst (diesel engine)

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.

371

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.

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Operation Driving instructions

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.

Emission control

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.

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.

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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

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Operation 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.

374

Warning!

i In case the central locking system does not release the fuel filler flap, see “Fuel filler flap” (컄 page 497).

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.

1 Fuel filler flap 2 Fuel filler cap 왘 Turn off the engine. 왘 Vehicles with SmartKey: Remove the

SmartKey from the starter switch. Vehicles with KEYLESS-GO*: Open the driver’s door (this puts the starter switch in position 0, same as with the SmartKey removed from the starter switch). The driver’s door then can be closed again.

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왘 Briefly push on fuel filler flap 1 at the

position indicated by the arrow. Fuel filler flap 1 opens slightly.

왘 Open fuel filler flap 1 completely. 왘 Turn fuel filler cap 2 counterclock- wise and hold on to it until possible pressure is released.

왘 Take off fuel filler cap 2.

! The fuel filler cap is tethered to the fuel filler neck. Do not drop the cap. It could damage the vehicle paint finish. 왘 Set fuel filler cap 2 on fuel filler

flap 1 as shown.

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.

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 fuel filler cap 2 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 fuel filler flap 1.

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).

Operation At the gas station

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 565), see “Fuel requirements” (컄 page 565), 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 HIGHWAY 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.

컄컄

375

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Operation At the gas station

컄컄

i Diesel engine: If you have driven the vehicle until the tank is empty, the fuel system needs to be bled (컄 page 527).

! 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 HIGHWAY 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.

376

Check regularly and before a long trip

왘 Open the hood (컄 page 378).

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.

Example illustration GL 450 (GL 320 CDI, GL 550 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 380).

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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 564).

Coolant For normal replenishing, use water (pota- ble water quality). For more information, see “Coolant level” (컄 page 381) and see “Fuels, coolants, lu- bricants” (컄 page 562).

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 383).

Vehicle lighting Check function and cleanliness. For infor- mation on replacing light bulbs, see “Re- placing bulbs” (컄 page 504). For more information, see “Exterior lamp switch” (컄 page 143).

Tire inflation pressure For more information, see “Checking tire inflation pressure” (컄 page 395).

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Operation Engine compartment

Hood

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.

Opening

Warning!

If you see flames or smoke coming from the engine compartment, or if the coolant tem- perature display 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.

378

Warning!

Warning!

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.

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)

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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.

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.

Operation Engine compartment

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.

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Operation Engine compartment

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.

! 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.

380

Checking engine oil level 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 illustration GL 450 (GL 320 CDI, GL 550 similar) 1 Oil dipstick 2 Upper mark 3 Lower mark

왘 Open the hood (컄 page 378). 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 381).

For more information on engine oil, see “Technical data” section (컄 page 562) and (컄 page 564).

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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.

Operation Engine compartment

왘 Screw filler cap 1 back on filler neck. For more information on engine oil, see “Technical data” section (컄 page 562) and (컄 page 564).

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. When checking the coolant level 앫 the vehicle must be parked on level

ground

앫 the coolant temperature must be below

158°F (70°C)

381

Example illustration GL 450 (GL 320 CDI, GL 550 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.

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Operation Engine compartment

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 display indicates 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 under pressure.

앫 Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts.

382

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.

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 567).

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

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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).

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.

Operation Engine compartment

! 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 569).

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Operation 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.

384

Warning!

Important guidelines

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.

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).

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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 393).

Tire inspection Every time you check your tire inflation pressure, you should also inspect your tires for the following: 앫 excessive treadwear (컄 page 386) 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.

385

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Operation Tires and wheels

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: