2009 Mercedes-benz G Class Owners Manual

Treadwear indicator : appears as a solid band across the tread.

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 fuels.

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.

Uniform Tire Quality Grading Standards

The Uniform Tire Quality Grading is a U.S. Government requirement designed to give drivers consistent and reliable information regarding tire performance. Tire manufacturers are required to grade tires

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The traction grades, from highest to lowest, are AA, A, B, and C. Those grades represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government test surfaces of asphalt and concrete. A tire marked C may have poor traction performance. G Warning! If ice has formed on the road, tire traction will be substantially reduced. Under such weather conditions, drive, steer and brake with extreme caution. The safe speed on a wet, snow covered or icy road is always lower than on a dry road. You should pay particular attention to the condition of the road whenever the outside temperature is close to the freezing point. Mercedes-Benz recommends winter tires (Y page 175) with a minimum tread depth of approximately 1/6 in (4 mm) on all four wheels for the winter season to ensure normal balanced handling characteristics. On packed snow, they can reduce your stopping distance compared to summer tires. Stopping distance, however, is still considerably greater than when the road is not covered with snow or ice. Exercise appropriate 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.

Temperature G Warning! The temperature grade for this tire is established for a tire that is properly inflated and not overloaded. Excessive speed, underinflation, or excessive loading, either separately or in combination, can cause excessive heat build-up and possible tire failure. The temperature grades are A (the highest), B, and C, representing the tire’s resistance to

the generation of heat and its ability to dissipate heat when tested under controlled conditions on a specified indoor laboratory test wheel. Sustained high temperature can cause the material of the tire to degenerate and reduce tire life, and excessive temperature can lead to sudden tire failure. The grade C corresponds to a level of performance which all passenger car tires must meet under the Federal Motor Vehicle Safety Standard No. 109. Grades B and A represent higher levels of performance on the laboratory test wheel than the minimum required by law.

Rotating tires G Warning! Rotate front and rear wheels only if the tires are of the same dimension. If your vehicle is equipped with mixed-size tires (different tire dimensions front vs. rear), tire rotation is not possible. G Warning! Have the tightening torque checked after changing a wheel. Wheels could become loose if not tightened with a torque of 96 lb-ft (130 Nm). Only use genuine Mercedes-Benz wheel bolts specified for your vehicle’s rims. Tire rotation can be performed on vehicles with tires of the same dimension all around. If your vehicle is equipped with tires of the same dimension all around, tires can be rotated, observing a front-to-rear rotation pattern that will maintain the intended rotation (spinning) direction of the tire (Y page 164). In some cases, such as when your vehicle is equipped with mixed-size tires (different tire dimension front vs. rear), tire rotation is not possible. If applicable to your vehicle’s tire configuration, tires can be rotated according

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to the tire manufacturer’s recommended intervals in the tire manufacturer’s warranty pamphlet located in your vehicle literature portfolio. If none is available, tires should be rotated every 3 000 to 6 000 miles (5 000 to 10 000 km), or sooner if necessary, according to the degree of tire wear. The same rotation (spinning) direction must be maintained. Rotate tires before the characteristic tire wear pattern becomes visible (shoulder wear on front tires and tread center wear on rear tires). Thoroughly clean the mounting face of wheels and brake disks, i.e. the inner side of the wheels/tires, during each rotation. Check for and ensure proper tire inflation pressure. For information on wheel change, see “Flat tire” (Y page 232).

Tire labeling Besides tire name (sales designation) and manufacturer name, a number of markings can be found on a tire. Following are some explanations for the markings on your vehicle’s tires:

: Uniform Tire Quality Grading Standards

; DOT, Tire Identification Number

(Y page 166)

(Y page 171)

= Maximum tire load (Y page 164) ? Maximum tire inflation pressure

(Y page 160) A Manufacturer B Tire ply material (Y page 172) C Tire size designation, load and speed

rating (Y page 168)

D Load identification (Y page 171) E Tire name

i For illustration purposes only. Actual data

on tires are specific to each vehicle and may vary from data shown in above illustration. For more information, see “Rims and tires” (Y page 250).

Tire size designation, load and speed rating

: Tire width ; Aspect ratio in % = Radial tire code ? Rim diameter A Tire load rating B Tire speed rating

i For illustration purposes only. Actual data

on tires are specific to each vehicle and may vary from data shown in above illustration.

General: Depending on the design standards used, the tire size molded into the sidewall may have no letter or a letter preceding the tire size designation.

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No letter preceding the size designation (as illustrated above): Passenger car tire based on European design standards. Letter “P” preceding the size designation: Passenger car tire based on U.S. design standards. Letter “LT” preceding the size designation: Light Truck tire based on U.S. design standards. Letter “T” preceding the size designation: Temporary spare tires which are high pressure compact spares designed for temporary emergency use only. Tire width Tire width : indicates the nominal tire width in millimeters. Aspect ratio Aspect ratio ; is the dimensional relationship between tire section height and section width and is expressed in percentage. The aspect ratio is arrived at by dividing section height by section width. Tire code Tire code = indicates the tire construction type. The “R” stands for radial tire type. Letter “D” means diagonal or bias ply construction; letter “B” means belted-bias ply construction. At the tire manufacturer’s option, any tire with a speed capability above 149 mph (240 km/h) can include a “ZR” in the size designation (for example: 245/40 ZR 18). For additional information, see “Tire speed rating” (Y page 169). Rim diameter Rim diameter ? is the diameter of the bead seat, not the diameter of the rim edge. The rim diameter is indicated in inches (in). Tire load rating G Warning! The tire load rating must always be at least half of the GAWR of your vehicle. Otherwise,

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tire failure may be the result which may cause an accident and/or serious injury to you or others. Always replace rims and tires with the same designation, manufacturer and type as shown on the original part. G 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 load rating A is a numerical code associated with the maximum load a tire can support. For example, a load rating of 91 corresponds to a maximum load of 1356 lb (615 kg) the tire is designed to support. See also “Maximum tire load” (Y page 164) where the maximum load associated with the load index is indicated in kilograms and lbs. For additional information on tire load rating, see “Load identification” (Y page 171). Tire speed rating G Warning! Even when permitted by law, never operate a vehicle at speeds greater than the maximum 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 personal injury and possible death, for you and for others. Regardless of the tire speed rating, local speed limits should be obeyed. Use prudent driving speeds appropriate to prevailing conditions. Tire speed rating B indicates the approved maximum speed for the tire.

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Summer tires Index ZR...Y ZR...(..Y) ZR

Speed rating up to 100 mph (160 km/h) up to 106 mph (170 km/h) up to 112 mph (180 km/h) up to 118 mph (190 km/h) up to 130 mph (210 km/h) up to 149 mph (240 km/h) up to 168 mph (270 km/h) up to 186 mph (300 km/h) up to 186 mph (300 km/h) above 186 mph (300 km/h) above 149 mph (240 km/h)

RAt the tire manufacturer’s option, any tire

with a speed capability above 149 mph (240 km/h) can include a “ZR” in the size designation (for example: 245/40 ZR18). To determine the maximum speed capability of the tire, the service description for the tire must be referred to. The service description is comprised of tire load rating A and tire speed rating B. If your tire includes “ZR” in the size designation and no service description is given, the tire manufacturer must be consulted for the maximum speed capability. If a service description is given, the speed capability is limited by the speed symbol in the service description. Example: 245/40 ZR18 97Y. In this example, “97Y” is the service description. The letter “Y” designates the speed rating and the speed capability of the tire is limited to 186 mph (300 km/h).

RAny tire with a speed capability above

186 mph (300 km/h) must include a “ZR”

8 or M+Sifor winter tires

in the size designation AND the service description must be placed in parenthesis. Example: 275/40 ZR 18 (99Y). The “(Y)” speed rating in parenthesis designates the maximum speed capability of the tire as being above 186 mph (300 km/h). Consult the tire manufacturer for the actual maximum permissible speed of the tire.

All-season and winter tires Speed rating Index up to 100 mph (160 km/h) Q M+S8
up to 118 mph (190 km/h) T M+S8
up to 130 mph (210 km/h) H M+S8
up to 149 mph (240 km/h) V M+S8

i Not all M+S rated tires provide special winter performance. Make sure the tires you use show M+S and the mountain/ snowflakeimarking on the tire sidewall. These tires meet specific snow traction performance requirements of the Rubber Manufacturers Association (RMA) and the Rubber Association of Canada (RAC) and have been designed specifically for use in snow conditions.

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 (Y page 250), for example when purchasing new tires. If you are uncertain about the correct reading of the information given on a tire’s sidewall,

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any authorized Mercedes-Benz Center will be glad to assist you.

Load identification

i For illustration purposes only. Actual data

on tires are specific to each vehicle and may vary from data shown in above illustration.

In addition to tire load rating, special load identification : may be molded into the tire sidewall following the letter designating the tire speed rating B (Y page 168). RNo specification given: absence of any text

(like in above example) indicates a standard load (SL) tire.

RXL or Extra Load: designates an extra load

(or reinforced) tire.

RLight Load: designates a light load tire. RC, D, E: designates load range associated with the maximum load a tire can carry at a specified pressure.

DOT, Tire Identification Number (TIN) U.S. tire regulations require each new tire manufacturer or tire retreader to mold a TIN into or onto a sidewall of each tire produced.

The TIN is a unique identifier which facilitates efforts by tire manufactures to notify purchasers in recall situations or other safety matters concerning tires and gives purchasers the means to easily identify such tires. The TIN is comprised of “Manufacturer’s identification mark” ;, “Tire size” =, “Tire type code” ? and “Date of manufacture” A. i For illustration purposes only. Actual data

on tires are specific to each vehicle and may vary from data shown in above illustration.

DOT (Department of Transportation) Tire branding symbol : denotes that the tire meets requirements of the U.S. Department of Transportation.

Manufacturer’s identification mark Manufacturer’s identification mark ; denotes the tire manufacturer. New tires have a mark with two symbols. Retreaded tires have a mark with four symbols. For more information on retreaded tires, see (Y page 154).

Tire size Code = indicates the tire size.

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Tire type code Tire type code ? may, at the option of the manufacturer, be used as a descriptive code for identifying significant characteristics of the tire.

Date of manufacture The date of manufacture A identifies the week and year of manufacture. The first two figures identify the week, starting with “01” to represent the first full week of the calendar year. The second two figures represent the year. For example, “3202” represents the 32nd week of 2002.

Tire ply material

i For illustration purposes only. Actual data

on tires are specific to each vehicle and may vary from data shown in above illustration.

This marking tells you about the type of cord and number of plies in the sidewall : and under the tread ;.

Tire and loading terminology Accessory weight The combined weight (in excess of those standard items which may be replaced) of automatic transmission, power steering, power brakes, power windows, power seats, radio, and heater, to the extent that these items are available as factory-installed equipment (whether installed or not).

Air pressure The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in pounds per square inch (psi), or kilopascal (kPa) or bar.

Aspect ratio Dimensional relationship between tire section height and section width expressed in percentage.

Bar Another metric unit for air pressure. There are 14.5038 pounds per square inch (psi) to 1 bar; there are 100 kilopascals (kPa) to 1 bar.

Bead The tire bead contains steel wires wrapped by steel cords that hold the tire onto the rim.

Cold tire inflation pressure Tire inflation pressure when your vehicle has been sitting for at least 3 hours or driven no more than 1 mile (1.6 km).

Curb weight The weight of a motor vehicle with standard equipment including the maximum capacity of fuel, oil, and coolant, and, if so equipped, air conditioning and additional optional equipment, but without passengers and cargo.

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DOT (Department of Transportation) A tire branding symbol which denotes the tire meets requirements of the U.S. Department of Transportation.

GAWR (Gross Axle Weight Rating) The GAWR is the maximum permissible axle weight. The gross vehicle weight on each axle must never exceed the GAWR for the front and rear axle indicated on the certification label located on the driver’s door B-pillar.

GTW (Gross Trailer Weight) The GTW is the weight of the trailer plus the weight of all cargo, equipment, luggage etc. loaded on the trailer.

GVW (Gross Vehicle Weight) The GVW comprises the weight of the vehicle including fuel, tools, spare wheel, installed accessories, passengers and cargo and, if applicable, trailer tongue load. The GVW must never exceed the GVWR indicated on the certification label located on the driver’s door B-pillar.

GVWR (Gross Vehicle Weight Rating) This is the maximum permissible vehicle weight of the fully loaded vehicle (weight of the vehicle including all options, passengers, fuel, and cargo and, if applicable, trailer tongue load). It is indicated on certification label located on the driver’s door B-pillar.

Kilopascal (kPa) The metric unit for air pressure. There are 6.9 kPa to 1 psi; another metric unit for air pressure is bar. There are 100 kilopascals (kPa) to 1 bar.

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173

Maximum load rating The maximum load in kilograms and pounds that can be carried by the tire.

Maximum loaded vehicle weight The sum of curb weight, accessory weight, total load limit, and production options weight.

Maximum permissible tire inflation pressure This number is the greatest amount of air pressure that should ever be put in the tire.

Normal occupant weight The number of occupants the vehicle is designed to seat, multiplied by 68 kilograms (150 lb).

Occupant distribution The distribution of occupants in a vehicle at their designated seating positions.

Production options weight The combined weight of those installed regular production options weighing over 5 lbs (2.3 kilograms) in excess of those standard items which they replace, not previously considered in curb weight or accessory weight, including heavy duty brakes, ride levelers, roof rack, heavy duty battery, and special trim.

PSI (Pounds per square inch) A standard unit of measure for air pressure.

Recommended tire inflation pressure The recommended tire inflation pressure for normal driving conditions is listed on the Tire and Loading Information placard located on the driver’s door B-pillar and provides best handling, tread life and riding comfort. If so equipped, supplemental information

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pertaining to special driving situations can be found on the tire inflation pressure label on the inside of the fuel filler flap.

Rim A metal support for a tire or a tire and tube assembly upon which the tire beads are seated.

Sidewall The portion of a tire between the tread and the bead.

TIN (Tire Identification Number) Unique identifier which facilitates efforts by tire manufacturers to notify purchasers in recall situations or other safety matters concerning tires and gives purchasers the means to easily identify such tires. The TIN is comprised of “Manufacturer’s identification mark”, “Tire size”, “Tire type code” and “Date of manufacture”.

Tire load rating Numerical code associated with the maximum load a tire can support.

Tire ply composition and material used This indicates the number of plies or the number of layers of rubber-coated fabric in the tire tread and sidewall. Tire manufacturers also must indicate the ply materials in the tire and sidewall, which include steel, nylon, polyester, and others.

Tire speed rating Part of tire designation; indicates the speed range for which a tire is approved.

Total load limit Rated cargo and luggage load plus 68 kilograms (150 lb) times the vehicle’s designated seating capacity.

Traction Force exerted by the vehicle on the road via the tires. The amount of grip provided.

Tread The portion of a tire that comes into contact with the road.

Treadwear indicators Narrow bands, sometimes called “wear bars” that show across the tread of a tire when only 1/16 in (1.6 mm) of tread remains.

TWR (Tongue Weight Rating) Maximum permissible weight on trailer tongue.

Uniform Tire Quality Grading Standards A tire information system that provides consumers with ratings for a tire’s traction, temperature and treadwear. Ratings are determined by tire manufacturers using U.S. government testing procedures. The ratings are molded into the sidewall of the tire.

Vehicle maximum load on the tire Load on an individual tire that is determined by distributing to each axle its share of the maximum loaded vehicle weight and dividing it by two.

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Winter driving General information Have your vehicle winterized at an authorized Mercedes-Benz Center.

Winter tires G Warning! Winter tires with a tread depth of less than 1/6 in (4 mm) must be replaced. They are no longer suitable for winter operation. G Warning! If you use your spare wheel when winter tires are fitted on the other wheels, be aware that the difference in tire characteristics may very well impair turning stability and that overall driving stability may be reduced. Adapt your driving style accordingly. Have the spare wheel replaced by regular road wheel with a winter tire at the nearest authorized Mercedes-Benz Center. Always use winter tires at temperatures below 45‡ (7†) and whenever wintry road conditions prevail. Not all M+S rated tires provide special winter performance. Make sure the tires you use show the mountain/ snowflakeimarking on the tire sidewall. These tires meet specific snow traction performance requirements of the Rubber Manufacturers Association (RMA) and the Rubber Association of Canada (RAC) and have been designed specifically for use in snow conditions. Use of winter tires is the only way to achieve the maximum effectiveness of your vehicle’s driving safety systems such as the ABS and the ESP® in winter operation. For safe handling, make sure all mounted winter tires are of the same make and have the same tread design. For information on winter tires for your vehicle model, see the “Technical data” section (Y page 250).

Winter driving 175

Always observe the speed rating of the winter tires installed on your vehicle.

Snow chains ! Some tire sizes do not leave adequate clearance for snow chains. To help avoid serious damage to your vehicle or tires, make sure the use of snow chains is permissible as specified in the “Technical data” section of this Operator’s Manual.

Snow chains should only be driven on snow- covered roads at speeds not to exceed 30 mph (50 km/h). Remove chains as soon as possible when driving on roads without snow. Observe the following guidelines when using snow chains: RUse of snow chains is not permissible with all wheel/tire combinations (Y page 250).

RUse snow chains in pairs and on rear

wheels only. Follow the manufacturer’s mounting instructions.

! If snow chains are mounted to the front wheels, they may scrape against the body or axle components. The tires or the vehicle could be damaged as a result.

ROnly use snow chains that are approved by Mercedes-Benz. Any authorized Mercedes- Benz Center will be glad to advise you on this subject.

RUse of snow chains may be prohibited

depending on location. Always check local and state laws before installing snow chains.

i When driving with snow chains, you may

wish to switch off the ESP® (Y page 52) before setting the vehicle in motion. This will improve the vehicle’s traction.

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Winter driving instructions G Warning! If the vehicle becomes stuck in snow, make sure 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 interior resulting in unconsciousness and death. To assure sufficient fresh air ventilation, open a window slightly on the side of the vehicle not facing the wind. G Warning! The outside temperature indicator is not designed to serve as an ice-warning device and is therefore unsuitable for that purpose. Indicated temperatures just above the freezing point do not guarantee that the road surface is free of ice. The road may still be icy, especially in wooded areas or on bridges. G Warning! On slippery road surfaces, never downshift in order to obtain braking action. This could result in drive wheel slip and reduced vehicle control. Your vehicle’s ABS will not prevent 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 LOW- RANGE ABS. 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 neutral position N. Try to keep the vehicle under control by corrective steering action. i For information on driving with snow

chains, see “Snow chains” (Y page 175).

Road salts and chemicals can adversely affect 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. If the vehicle is parked after being driven on salt-treated roads, the braking efficiency should be tested as soon as possible after driving is resumed. G Warning! Make sure not to endanger any other road users when carrying out these braking maneuvers.

Driving instructions Drive sensibly – save fuel To save fuel you should: RKeep tires at the recommended inflation

pressures.

RRemove unnecessary loads. RAllow engine to warm up under low load

use.

RAvoid frequent acceleration and

deceleration.

RHave all maintenance work performed at the intervals specified in the Maintenance Booklet and as required by the Maintenance system. Contact an authorized Mercedes-Benz Center.

Fuel consumption is also increased by driving in cold weather, in stop-and-go traffic, on short trips and in mountainous areas.

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Drinking and driving G Warning! Drinking and driving and/or taking drugs and driving are very dangerous combinations. Even a small amount of alcohol or drugs can affect your reflexes, perceptions and judgment. The possibility of a serious or even fatal accident are greatly increased when you drink or take drugs and drive. Do not drink or take drugs and drive or allow anyone to drive who has been drinking or taking drugs.

Pedals G Warning! Make sure absolutely no objects are obstructing the pedals’ range of movement. Keep the driver’s footwell clear of all obstacles. If there are any floormats or carpets in the footwell, make sure that the pedals still have sufficient clearance. During sudden driving or braking maneuvers, the objects could get caught between the pedals. You could then no longer brake or accelerate. This could lead to accidents and injury.

Power assistance G Warning! There is no power assistance for the steering and the service brake when the engine is not running. Steering and braking requires significantly more effort and you could lose control of the vehicle and cause an accident as a result. Do not turn off the engine while the vehicle is in motion.

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177

Brakes Downhill grades ! When driving down long and steep

grades, relieve the load on the brakes by shifting into a lower gear to use the engine’s braking power. This helps prevent overheating of the brakes and reduces wear. When using the engine’s braking power, a drive wheel may not spin for an extended period of time, e.g. on slippery road surfaces. This may cause serious damage to the drivetrain which is not covered by the Mercedes-Benz Limited Warranty.

Continuous or hard braking G Warning! Resting your foot on the brake pedal will cause excessive and premature wear of the brake pads. It can also result in the brakes overheating, thereby significantly reducing their effectiveness. It may not be possible to stop the vehicle in sufficient time to avoid an accident. After hard braking, it is advisable to drive on for some time, rather than immediately park, so that the air stream will cool down the brakes faster.

Wet roads G Warning! After driving in heavy rain for some time without applying the brakes or through water deep enough to wet brake components, the first braking action may be somewhat reduced and increased pedal pressure may be necessary to obtain expected brake effect. Maintain a safe distance from vehicles in front. To help prevent brake disk corrosion after driving on wet or salt-covered roads, it is advisable to brake the vehicle with

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G Warning! If other than recommended brake pads are installed, or other than recommended brake fluid is used, the braking properties of the vehicle can be degraded to an extent that safe braking is substantially impaired. This could result in an accident.

! Only conduct operational or performance tests on a two-axle dynamometer. If such tests are necessary, contact an authorized Mercedes-Benz Center. You could otherwise seriously damage the brake system or the transfer case which is not covered by the Mercedes-Benz Limited Warranty.

! Because the ESP® operates

automatically, the engine and ignition must be shut off (SmartKey in starter switch position 0 or 1) when the parking brake is being tested on a brake test dynamometer. Such testing should be no longer than 10
seconds. Active braking action through the ESP® may otherwise seriously damage the brake system which is not covered by the Mercedes-Benz Limited Warranty. If your brake system is normally only subjected to moderate loads, you should occasionally test the effectiveness of the brakes by applying above-normal braking pressure at higher speeds. This will also enhance the grip of the brake pads. G Warning! Make sure not to endanger any other road users when carrying out these braking maneuvers.

considerable force prior to parking. The heat generated serves to dry the brakes.

Salt-covered roads G Warning! A layer of salt on the brake discs and the brake linings may cause a delay in the braking effect, resulting in a significantly increased braking distance, which could lead to an accident. To avoid this danger, you should: Roccasionally brake carefully when you are driving on salt-covered roads, so that any layer of salt that may have built up on the brake discs and the brake linings is removed without putting other road users at risk

Rmaintain a greater distance to the vehicle

ahead and drive with particular care

Rcarefully apply the brakes at the end of a trip and immediately after commencing a new trip, so that salt residues are removed from the brake disc

Brake service ! The brake fluid level in the reservoir may be too low if the brake warning lamp in the instrument cluster comes on although the parking brake is released. Observe additional messages in the multifunction display that may appear. Brake pad wear or a leak in the system may be the reason for low brake fluid in the reservoir. Have the brake system inspected immediately. Contact an authorized Mercedes-Benz Center.

All checks and service work on the brake system should be carried out by qualified technicians only. Contact an authorized Mercedes-Benz Center. Only install brake pads and use brake fluid recommended by Mercedes-Benz.

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179

Driving off Warm up the engine smoothly. Do not place full load on the engine until the operating temperature has been reached. ! When driving off on a slippery surface, do

not allow a drive wheel to spin for an extended period with the ESP® switched off. Doing so may cause serious damage to the drivetrain which is not covered by the Mercedes-Benz Limited Warranty.

! Simultaneously depressing the

accelerator pedal and applying the brakes reduces engine performance and causes premature brake and drivetrain wear which is not covered by the Mercedes-Benz Limited Warranty.

Hydroplaning Depending on the depth of the water layer on the road, hydroplaning may occur, even at low speeds and with new tires. In heavy rain or when conditions indicate possible hydroplaning: X Reduce vehicle speed. X Avoid track grooves in the road. X Apply brakes cautiously.

Standing water ! Do not drive through flooded areas.

Before driving through water, determine its depth. If you must drive through standing water, drive slowly to prevent water from entering the passenger compartment or the engine compartment. Water in these areas could cause damage to electrical components or wiring of the engine or transmission, or could result in water being ingested by the engine through the air intake causing severe internal engine damage. Any such

damage is not covered by the Mercedes- Benz Limited Warranty.

Prevent water from entering the passenger compartment or the engine compartment. If you must drive through standing water, keep in mind that Rthe maximum depth of the water may not

exceed 19 in (48 cm) Ryou must drive slowly For more information, see “Driving through water” (Y page 182).

Off-road driving G Warning! Do not load items on the roof. 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 obstacles and avoid damage to the vehicle. To help avoid the vehicle rolling over, never turn it around on steep inclines. If the vehicle 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”. G 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.

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180 Driving instructions

Read this chapter carefully before you begin off-road travel. Familiarize yourself with the vehicle characteristics and gear changing before you attempt any difficult terrain off-road driving. We recommend that you start out with easy off-road travel.

Special driving features for off-road driving The following driving features are available for specific kind of operation: RABS (Y page 51) RESP® (Y page 52) R4-ETS (Y page 53) RDifferential locks (Y page 93) RTransfer case (Y page 91)

Off-road driving rules REngage the transfer case in position LOW

before driving under off-road conditions (Y page 91).

RIf necessary, activate differential locks

(Y page 93). The ABS, BAS and ESP® are switched off automatically when the differential locks are activated.

RFasten items being carried as securely as

possible (Y page 126).

! Observe the following during off-road

driving: RKeep doors, tailgate, windows, and tilt/ sliding sunroof closed whenever driving off-road.

RSwitch the cruise control off. RAdjust vehicle speed to condition of terrain. The more uneven, rutty and steeper the terrain, the lower the speed should be. Drive through water slowly at an even speed, avoiding a bow wave.

RBe especially careful when driving in

unknown territory. It may be necessary to get out of the vehicle and scout the path you intend to take.

RWatch out for obstacles, such as rocks,

holes, tree stumps and ruts.

RAvoid excessive engine speeds – drive at

moderate engine speeds (max. 3 000
rpm).

RBefore driving through water, determine

its depth.

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

RIn sandy soil, drive at a steady speed as

allowed by conditions. This helps overcome the vehicle rolling resistance and reduces the likelihood of the vehicle sinking into the ground.

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

RAlways drive onto slopes with the engine

running and the vehicle in gear.

RDo not shift automatic transmission into

neutral position N.

RInspect the vehicle for possible damage

after each off-road trip.

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

Checklist before off-road driving Engine oil level RCheck the engine oil level (Y page 149).

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Only with a proper oil level can the vehicle obtain a trouble-free oil supply, even on steep gradients.

! If an engine oil level warning message

appears in the multifunction display while driving, stop the vehicle in a safe location or as soon at is safe to do so. Check the engine oil level. The engine oil level warning messages should not be ignored. Extended driving with the message displayed could result in serious engine damage that is not covered by the Mercedes-Benz Limited Warranty.

Tires RCheck 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 (Y page 161).

RCheck tires for possible damage and

remove foreign objects.

RReplace missing valve caps.

Rims RDented or bent rims can cause tire inflation pressure loss and damage the tire beads. For this reason, check and, if necessary, change rims before driving off-road.

Vehicle tool kit RCheck if the jack (Y page 195) is

functional.

RAlways take the vehicle tool kit, a strong

tow rope, a shovel and a small plank (to put under the jack on sandy soil) with you.

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181

Driving in steep terrain

Slope angle : Overhang angle, front ; Overhang angle, rear

G 550
G 55 AMG

37° 23°

31° 26°

RComply with the warnings (Y page 179) and

rules for off-road driving (Y page 180).

RDriving on embankments, slopes and other steep inclines should only be done straight up or downhill, i. e. in the line of gravity. Maximum vehicle climbing ability is a 80% grade which is equivalent to a slope angle of approximately 38°. Keep in mind that the climbing ability of the vehicle depends on terrain conditions.

RShift automatic transmission into gear

range 2 or 1 (Y page 89).

RDrive slowly. RUtilize the engine’s braking power when descending a slope, observe the engine speed (do not overrev the engine). Apply the service brake as needed.

i For maximum engine speed, see

“Tachometer” (Y page 96) and see vehicle specification for your vehicle (Y page 248).

RCheck the brakes after a lengthy

downgrade drive.

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182 Driving instructions

G 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. Traction in steep terrain 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 away from the front 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 into neutral 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: Rlosing ground contact when cresting hills Rlosing its forward momentum Rspeeding up too much after climbing the hill

Driving downhill RShift automatic transmission into gear

range 1 (Y page 89).

RDrive downhill observing the same rules as

driving uphill (Y page 181).

i The special LOW RANGE – ABS

(Y page 51) 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

: Fording depth, 20 in (50 cm) RBefore driving through water, determine its

depth.

! The water depth must not exceed 20 in (50 cm). 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.

RComply with the warnings (Y page 179) and

rules for off-road driving (Y page 180).

RSwitch off the exterior lamps as well as the

climate control.

RShift automatic transmission into gear

range 1 or 2 (Y page 89). RAvoid high engine speeds. REnter 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.

RDrive through the water slowly and at a

constant speed.

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

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! Do not open any of the vehicle’s doors while driving through water. Water could otherwise enter the vehicle interior and damage the vehicle’s electronics, as well as the interior equipment.

RThere is a very high level of driving

resistance in water. The surface is slippery and may not be firm, making pulling away in water difficult and dangerous.

RMake sure that only small bow waves are formed when driving the vehicle through water.

RClean mud off the tire tread after driving

through water.

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

Crossing obstacles

! Obstacles can damage the vehicle

underbody or suspension components. If possible use the assistance of a second person outside 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, inspect vehicle for any damage, especially

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183

vehicle underbody and suspension components. Failure to do so can adversely affect the vehicle’s future performance, including increased chance of an accident. When driving over tree stumps, big rocks and other obstacles, observe the following rules: RComply with the warnings (Y page 179) and

rules for off-road driving (Y page 180).

RAvoid high engine speeds. RShift automatic transmission into gear

range 1 (Y page 89).

RCheck the vehicle clearance before

crossing obstacles.

RCross obstacles (e. g. tree stumps or big

rocks) very slowly by aiming one of the front wheels at the center of the obstacle, 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.

Driving on sand G Warning! Do not reduce the tire inflation pressure before driving through sand. However, if you do so, remember to correct the tire inflation pressure 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 following rules: RAvoid high engine speeds. RShift automatic transmission into a gear range that is appropriate for the terrain. RIn sandy soil, drive at a steady speed as

conditions permit. This helps overcome the vehicle rolling resistance and reduce the

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184 Driving instructions

likelihood of the vehicle sinking into the ground.

RDrive in tracks of other vehicles if they are

not too deep and you have sufficient clearance.

Ruts A number of off-road tracks or other byways have deep ruts which can cause the underbody to come in contact with the ground. ! Check that the ruts are not too deep and

your vehicle’s clearance is sufficient. Otherwise: Ryour vehicle may be damaged Rthe underbody of the vehicle may come in contact with the ground and you may get stuck

RAvoid high engine speeds. RComply with the warnings (Y page 179) and

rules for off-road driving (Y page 180). RShift automatic transmission into gear

range 1 (Y page 89).

RDrive next to the ruts rather than through

them if at all possible.

RIf 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 G Warning! Never drive on pavement with activated differential locks. Engaged front axle differential locks limits ability to move around curves. If you feel a sudden significant vibration or ride disturbance, or you suspect that possible damage to your vehicle has occurred, you should turn on the hazard warning flashers, carefully slow down, and drive with caution to an area which is a safe distance from the road.

Inspect the tires and the vehicle underbody for possible damage. If the vehicle or tires appear unsafe, have the vehicle towed to the nearest authorized Mercedes-Benz Center or tire dealer for repairs. Off-road driving increases strain on the vehicle. We recommend that you inspect the vehicle for possible damage after each off-road trip. Recognizing any damage and a subsequent timely repair reduces the chance of a possible breakdown or accident later on. Proceed as follows: RSwitch the transfer case to position HIGH

(Y page 91).

RSwitch differential locks off (Y page 93). RClean all exterior lamps and check for

possible damage.

RClean the front and rear license plate. RRemove excessive dirt from tires, wheels,

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

RCheck tires for possible damage. RInspect vehicle underbody, oil pan, brake hoses, etc., as well as vehicle underbody for possible damage.

RCheck for brush or branches caught in the

underbody.

! Brush or branches could increase the

possibility of a fire, as well as cut fuel and/ or brake lines, puncture rubber bellows of the axles or drive shafts.

RAfter continued operation in mud, sand, water or other dirty conditions clean the brake discs, wheels, brake pads and check and clean axle joints. RConduct a brake test.

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Maintenance 185

Driving abroad If you plan to drive the vehicle outside the U.S. or Canada, you should request dealer network information for your destination from any authorized Mercedes-Benz Center.

Control and operation of radio transmitters Safety notes G Warning! Please do not forget that your primary responsibility is to drive the vehicle. A driver’s attention to the road must always be his/her primary focus when driving. For your safety and the safety of others, we recommend that you pull over to a safe location and stop before placing or taking a telephone call. If you choose to use the telephone9 while driving, please use the hands-free device and only use the telephone when road, weather and traffic conditions permit. Some jurisdictions prohibit the driver from using a mobile telephone while driving a vehicle. Only operate the audio system or COMAND9
(Cockpit Management and Data System) if road, weather and traffic conditions permit. Otherwise, you may not be able to observe traffic conditions and could endanger yourself and others. Bear in mind that at a speed of just 30 mph (approximately 50 km/h), your vehicle is covering a distance of 44 feet (approximately 14 m) every second.

Emission control Certain systems of the engine serve to keep the toxic components of the exhaust gases within permissible limits required by law. These systems will function properly only when maintained strictly according to factory

9 Observe all legal requirements.

specifications. Any adjustments on the engine should, therefore, be carried out only by qualified Mercedes-Benz Center authorized technicians. Engine adjustments should not be altered in any way. Moreover, the specified service procedures must be carried out regularly according to Mercedes-Benz servicing requirements. For details refer to the Maintenance Booklet. G Warning! Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide (CO), and inhaling it can cause unconsciousness 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 window fully open at all times.

Maintenance Notes The Maintenance System in your vehicle tracks the distance driven and the time elapsed since the last maintenance service. It calculates other maintenance service work required, and calls for the next maintenance service accordingly. We strongly recommend that you have your vehicle serviced at an authorized Mercedes- Benz Center, in accordance with the Maintenance Booklet at the times called for by the maintenance service indicator. i Failure to have the vehicle maintained in accordance with the Maintenance Booklet and maintenance service indicator at the designated times/mileage will result in

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186 Maintenance

vehicle damage not covered by the Mercedes-Benz Limited Warranty.

Maintenance service indicator message The maintenance service indicator message will notify you when the next maintenance service is due. Service A In XXXXX Miles (km) Service A In XXX Days Service A Due Now

The type of maintenance service due is indicated in the multifunction display: ¯ Basic service (A) ± Extended service (B) Refer to Maintenance Booklet for a listing of maintenance services and intervals they need to be performed at.

Clearing the maintenance service indicator message The maintenance service indicator message is cleared automatically Rafter approximately 10 seconds when you

switch on the ignition

Rafter approximately 10 seconds when

reaching the service threshold while driving Rafter approximately 30 seconds, once the suggested maintenance service term has passed

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X Clearing the maintenance service

indicator message manually: Press reset button : on the instrument cluster. The standard display appears in the multifunction display.

Maintenance service term exceeded If you have exceeded the suggested maintenance service term, you will see the following message in the multifunction display: Service A Exceeded By XXXXX Miles (Km) In addition, a signal sounds when the message appears. Any authorized Mercedes-Benz Center will reset the maintenance service indicator following a completed maintenance service.

Calling up the maintenance service indicator display i The menu overview can be found on

(Y page 99).

You can call up the maintenance service indicator display at any time to check when the next maintenance service is due. X Switch on the ignition. X Press button V or U on the

multifunction steering wheel repeatedly

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until the standard display (Y page 99) appears in the multifunction display.

X Press button * or & on the

multifunction steering wheel until the maintenance service indicator display with the service symbol ¯ or ± and the maintenance service deadline appears in the multifunction display.

i If the battery is disconnected, the days of

disconnection will not be included in the count shown by the maintenance service indicator. To arrive at the true maintenance service deadline, you will need to subtract these days from the days shown in the maintenance service indicator message or maintenance service indicator display. Do not confuse the maintenance service indicator with the engine oil level indicator 4.

Resetting the maintenance service indicator In the event that the maintenance service on your vehicle is not carried out at an authorized Mercedes-Benz Center, you can have the maintenance service indicator reset. The automotive maintenance facility carrying out the maintenance service will find the information for resetting the maintenance service indicator in the maintenance-relevant literature for your vehicle. Such literature is available from any authorized Mercedes-Benz Center or directly from Mercedes-Benz. ! If the maintenance service indicator was

inadvertently reset, have an authorized Mercedes-Benz Center correct it. Only reset if the proper maintenance service has been performed. Resetting the system without performing the proper maintenance service as called for by the maintenance service indicator will result in engine damage and/or other vehicle

Vehicle care 187

damage not covered by the Mercedes-Benz Limited Warranty.

Vehicle care Cleaning and care of the vehicle Notes Regular and proper care will help to maintain the value of your vehicle. G Warning! Many cleaning products can be hazardous. Some are poisonous, others are flammable. Always follow the instructions on the particular container. Always open your vehicle’s doors or windows when cleaning the inside. Never use fluids or solvents that are not designed for cleaning your vehicle. Always lock away cleaning products and keep them out of reach of children.

! When cleaning the vehicle, do not use

scouring agents. Never apply strong force and only use a soft, wet cloth or sponge. Otherwise you may scratch or damage the surface to be cleaned.

While in operation, even while parked, your vehicle is subjected to varying external influences which, if gone unchecked, can attack the paintwork as well as the vehicle underbody and cause lasting damage. Such damage is caused not only by extreme and varying climatic conditions, but also by: RAir pollution RRoad salt RTar RGravel and stone chipping To avoid paint damage, you should immediately remove: RGrease and oil RFuel

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RCoolant RBrake fluid RBird droppings RInsects RTree resins etc. Frequent washing reduces and/or eliminates the aggressiveness and potency of the above adverse influences. More frequent washings are necessary to deal with unfavorable conditions: Rnear the ocean Rin industrial areas (smoke, exhaust

emissions)

Rduring winter operation You should check your vehicle from time to time for stone chipping or other damage. Any damage should be repaired as soon as possible to prevent corrosion. In doing so, do not neglect the underbody of the vehicle. A prerequisite for a thorough check is a washing of the underbody followed by a thorough inspection. Damaged areas need to be re-undercoated. Your vehicle has been treated at the factory with a wax-base rustproofing in the body cavities which will last for the lifetime of the vehicle. Post-production treatment is neither necessary nor recommended by Mercedes- Benz because of the possibility of incompatibility between materials used in the production process and others applied later. We have selected vehicle-care products and compiled recommendations which are specially matched to our vehicles and which always reflect the latest technology. You can obtain Mercedes-Benz approved vehicle-care products at an authorized Mercedes-Benz Center. Scratches, corrosive deposits, corrosion or damage due to negligent or incorrect care cannot always be removed or repaired with the vehicle-care products recommended

here. In such cases it is best to seek aid at an authorized Mercedes-Benz Center. The following topics deal with the cleaning and care of your vehicle and give important “how-to” information as well as references to Mercedes-Benz approved vehicle-care products.

Power washer ! Follow the instructions provided by the

power washer manufacturer on maintaining a distance between the vehicle and the nozzle of the power washer. 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. Always keep the jet of water moving across the surface. Do not aim directly at electrical parts, electrical connectors, seals, or other rubber parts.

Tar stains Quickly remove tar stains before they dry and become more difficult to remove. A tar remover is recommended.

Paintwork, painted body components ! Affixing stickers, magnets, adhesive tape

or similar materials to painted body components may damage the paintwork. Mercedes-Benz approved Paint Care should be applied when water drops on the paint surface do not “bead up”. This should normally be done every 3 to 5 months, depending on the climate and washing detergent used. Mercedes-Benz approved Paint Cleaner should be applied if the paint surface shows signs of embedded dirt (i.e. loss of gloss). Do not apply any of these products or wax if your vehicle is parked in the sun or if the hood is still hot.

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X Use the appropriate MB-Touch-Up Stick for quick and provisional repairs of minor paint damage (i.e. chips from stones, vehicle doors, etc.).

Engine cleaning Prior to cleaning the engine compartment, make sure to protect electrical components and connectors from contact with water and cleaning agents. Corrosion protection, such as MB Anticorrosion Wax should be applied to the engine compartment after every engine cleaning. Before applying, all control linkage bushings and joints should be lubricated. The poly-V-belt and all pulleys should be protected from any wax.

Vehicle washing In the winter, thoroughly remove all traces of road salt as soon as possible. When washing the vehicle underbody, do not forget to clean the inner sides of the wheels. Hand-wash X Do not use hot water or wash your vehicle

in direct sunlight.

X Only use a soft, wet cloth or sponge to

clean the vehicle.

X Only use a mild vehicle wash detergent,

such as Mercedes-Benz approved Car Shampoo.

X Thoroughly spray the vehicle with a

diffused jet of water.

X Do not spray directly towards the

ventilation intake.

X Use plenty of water and rinse the sponge

and chamois frequently.

X Rinse with clean water and thoroughly dry

with a chamois. Do not allow cleaning agents to dry on the finish.

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Automatic car wash You can have your vehicle washed in an automatic car wash from the start. Brushless car washes are preferable. X To protect the filter system, activate the air recirculation mode using button g on the climate control panel.

! Do not clean your vehicle in an automatic

touchless car wash which uses caustic spray. Caustic spray will damage the paint or ornamental moldings.

If the vehicle is very dirty, prewash it before running it through the automatic car wash. ! Make sure the combination switch is set

to wiper setting 0. Otherwise, the rain sensor could activate and cause the wipers to move unintentionally. This may lead to vehicle damage. Due to the width of the vehicle, fold in exterior rear view mirrors prior to running the vehicle through an automatic car wash to prevent damage to the mirrors.

When leaving the automatic car wash, make sure the mirrors are folded out. After running the vehicle through an automatic car wash, wipe any wax off of the windshield and the wiper blade inserts. This will prevent smears and reduce wiping noise which can be caused by residual wax on the windshield.

Ornamental moldings X For regular cleaning and care of ornamental

moldings, use a damp cloth.