2002 Mercedes-benz G Class Owners Manual

Practical hints

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Off-Road driving 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. Please read this chapter carefully before you begin off-road travel. Special driving features are available for specific kinds of operation: • ABS, see page 239
• ESP, see page 243
• Differential lock, see page 253
• Transfer case, see page 247
Engage the transfer case in position LOW before driving under off-road conditions. For switching the transfer case in position LOW, see page 247.

Fasten items being carried as securely as possible, see page 178.

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

We recommend to keep doors, tailgate, windows, and roof closed whenever driving in off-road mode. We recommend to switch the cruise control off.

Important! Adjust vehicle speed to condition of terrain. The more uneven, rutty and steeper the terrain, the lower the speed should be. Watch out for obstacles, such as rocks, holes, tree-stumps, ruts.

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Be especially careful when driving in unknown territory. It is good practice to get out of the vehicle and scout the path you intend to take. Continuous and speedy driving in sandy soil overcomes the vehicle rolling resistance, and helps to prevent the vehicle from sinking into the ground. Switch on the differential locks, see page 253. Do not initiate jumps with the vehicle. It interrupts the forward momentum of the vehicle. Always drive on slopes with the engine running and the vehicle in gear. Sand, dirt, mud and other material having friction property, can cause exceptional wear and tear as well as failure of the brakes. In this case the brakes may be less effective or even fail when you most need them. Always clean and check the brakes following each off-road trip.

Checklist before off-road driving • Engine oil level: Check the engine oil level, see

page 127 and page 304. The display “ENGINE OIL LEVEL – O.K.” must appear in the multifunction display. Only then is a trouble free oil supply obtained even on steep gradients with the vehicle.

• Tires: Check the tread depth and maintain specified tire pressure (see tire pressure label inside the fuel filler flap). Check tires for possible damage and remove foreign objects. The valve caps must be mounted.

• Rims: Dented or bent rims can cause tire pressure

loss and damage the tire beads. For this reason, check and, if necessary, change rims before driving off-road.

• Vehicle tool kit: Check if the vehicle jack is

functional. 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.

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Driving in steep terrain

P00.00-3186-26

Slope angle: 1 27° 2 36° Switch the transfer case in position LOW before starting to drive up or down steep inclines, see page 248. If necessary activate differential locks, see page 253. ABS, BAS and ESP are switched off automatically when the differential locks are activated.

Maximum vehicle climbing ability is a 80% grade. Driving on embankments, slopes and other steep inclines should only be done straight up or downhill, i.e. in the line of gravity. Do not drive along the side of a slope (danger of vehicle 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). 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. Utilize the engine’s braking power when descending a slope, observe the engine speed (do not overrev the engine). Apply the service brake as needed. Check the brakes after a lengthy downgrade drive.

Notes: Avoid excessive engine speeds – drive with moderate engine speeds (max. 3000 RPM). Select gear range “2” or “1” on the automatic transmission, see page 207.

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Traction in steep terrain: Be easy on the accelerator and watch for continuous wheel traction when driving in steep terrain. When the differential locks are not engaged, 4-ETS helps greatly when starting out on a steep incline. The front wheels have then the tendency to slip due to the weight reduction over the front axle. The ETS recognizes the situation and limits the torque for the front wheels by braking them. Simultaneously the torque for the rear wheels is increased. See page 241 for four wheel electronic traction system (4-ETS).

Driving across a hilltop: To prevent the vehicle from speeding up too much after climbing a hill, decelerate just ahead of a hilltop (do not select gear range “N”). Use the momentum of the vehicle to drive across the hilltop. Driving in this manner prevents the vehicle from jumping across the hilltop and thus loosing its forward momentum.

Driving downhill: Select gear range “1” on the automatic transmission, see page 207.

Drive downhill observing the same rules as driving uphill. Driving on embankments, slopes and other steep inclines should only be done straight up or downhill, i.e. in the line of gravity. Do not drive along the side of a slope (danger of vehicle 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). Utilize the engine’s braking power when descending a slope, observe the engine speed (do not overrev the engine). Apply the service brake as needed. The special LOW range ABS setting allows for precise and brief (cyclical) blocking of the front wheels, permitting them to dig into loose ground. Remember that the front wheels when stopped, slide across a surface, thus loose their ability to steer the vehicle. Check the brakes after a lengthy downgrade drive.

Important! Only apply the service brake if the vehicle travels straight downhill, i.e. in the line of gravity.

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Driving through water

Switch the transfer case in position LOW before driving through water. If necessary activate differential locks, see page 253. ABS, BAS and ESP are switched off automatically when the differential locks are activated. Switch off the exterior lamps as well as the climate control. Enter the water only at a shallow spot. Never take a running start. Drive slowly, avoiding a bow wave. Do not stop vehicle immersed in water, and do not shut off the engine. To dry the brakes, apply pressure to the brake pedal several times after leaving the water.

1 20 in (50 cm)

Before driving through water, determine its depth. It should not be deeper than approximately 20 inches (50 cm).

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Crossing obstacles: Select gear range “1” on the automatic transmission, see page 207. If necessary activate differential locks, see page 253. ABS, BAS and ESP are switched off automatically when the differential locks are activated. Cross 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.

Important! Damage on the vehicle definitely increases the chance for a subsequent accident.

Notes: Check the vehicle clearance before crossing obstacles that possibly could damage the undercarriage. If possible use the assistance of a second person. Special attention is needed when crossing obstacles on a steep incline. The vehicle could slide sideways as a result of its possible slanted position.

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Notes: Check the vehicle clearance. Damage on the vehicle definitely increases the chance for a subsequent accident.

Ruts: Select gear range “1” on the automatic transmission, see page 207. If necessary activate differential locks, see page 253. ABS, BAS and ESP are switched off automatically when the differential locks are activated. A number of off-road tracks or other byways have deep ruts which can cause the undercarriage to come in contact with the ground. Drive next to the ruts rather than through them if at all possible.

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Returning from off-road driving 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: • Disengage the differential locks, see page 253. • Engage the transfer case in position HIGH, see

page 247.

• Remove 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.

• Inspect frame, oil pan, brake hoses, etc., as well as

vehicle underbody for possible damage.

• Check tires for possible damage, clean all exterior

lamps, and conduct a brake test.

• Check for brush or branches caught in the

undercarriage. They 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.

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

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Cruise control

The cruise control allows you to drive in a more relaxed manner, for example over long distances, as it automatically maintains the set speed by actively regulating the throttle setting. Any given speed above approximately 25 mph (40 km/h) can be maintained with the cruise control by operating the lever.

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1 Accelerate and set:

Lift lever briefly to set speed. Hold lever up to accelerate.

2 Decelerate and set:

Depress lever briefly to set speed. Hold lever down to decelerate. Normally the vehicle is accelerated to the desired speed with the accelerator. Speed is set by briefly pushing the lever to position 1 or 2. The accelerator can then be released. The speed can be increased (e.g. for passing) by using the accelerator. After the accelerator is released, the previously set speed will be resumed automatically. If a set speed is to be increased or decreased slightly, e.g. to adapt to the traffic flow, hold lever in position 1 or 2 until the desired speed is reached, or briefly tip the lever in the appropriate direction for increases or decreases in 0.6 mph (1 km/h) increments. When the lever is released, the newly set speed remains.

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3 Canceling

To cancel the cruise control, briefly push lever to position 3. When you step on the brake pedal or the vehicle speed drops below approximately 25 mph (40 km/h), for example when driving upgrade, the cruise control will be canceled. If the cruise control cancels by itself and remains inoperative until the engine is restarted, have the system checked at your authorized Mercedes-Benz Light Truck Center as soon as possible.

4 Resume

If the lever is briefly pushed to position 4 when driving at a speed exceeding approximately 25 mph (40 km/h), the vehicle resumes the speed which was set prior to the cancellation of the cruise control. The last memorized speed is canceled when the electronic key in the starter switch is turned to position 1 or 0.

Important! Moving gear selector lever to position “N” switches the cruise control off.

Warning! Only use the cruise control if the traffic and weather conditions make it advisable to travel at a steady speed.

• The use of cruise control can be dangerous on

winding roads or in heavy traffic because conditions do not allow safe driving at a steady speed.

• The use of cruise control can be dangerous on slippery roads. Rapid changes in tire adhesion can result in wheel spin and loss of control.

The “Resume” function should only be operated if the driver is fully aware of the previously set speed and wishes to resume this particular preset speed.

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Transmission in position LOW The cruise control should not be activated during off- road driving in transfer case position LOW. Doing so could reduce driving comfort.

Notes: If the engine does not brake the vehicle sufficiently while driving on a downgrade, the speed you set on the cruise control may be exceeded. In this case the automatic transmission shifts down (max. to 3rd gear) to maintain the set cruise control speed by using the engine’s braking power. As soon as the grade eases, the automatic transmission shifts up again dependent on the selector lever position. Nevertheless, in some cases you may have to step on the brake pedal to slow down. In this case the cruise control is switched off. Use the lever to resume the previously set speed. For malfunction and warning messages, see page 272.

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Brake assist system (BAS)

Warning! BAS cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase braking efficiency beyond that afforded by the condition of the vehicle brakes and tires or the traction afforded. The BAS cannot prevent accidents, including those resulting from excessive speed in turns, following another vehicle too closely, or aquaplaning. Only a safe, attentive, and skillful driver can prevent accidents. The capabilities of a BAS equipped vehicle must never be exploited in a reckless or dangerous manner which could jeopardize the user’s safety or the safety of others.

The BAS is designed to maximize the vehicle’s braking capability during emergency braking maneuvers by having maximum power boost applied to the brakes more quickly in emergency braking conditions than might otherwise be afforded solely by the driver’s braking style. This can help reduce braking distances over what ordinary driving and braking style might do. The BAS complements the antilock brake system (ABS). Applying the brakes very quickly results in maximum BAS assistance. To receive the benefit of the system you must apply continuous full braking power during the stopping sequence. Do not reduce brake pedal pressure. Once the brake pedal is released, the BAS is deactivated. At the instant one of the wheels is about to lock up, a slight pulsation can be felt in the brake pedal, indicating that the ABS is in the regulating mode. Keep firm and steady pressure on the brake pedal while experiencing the pulsation.

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If the É malfunction indicator lamp and the ESP warning lamp stay illuminated and warning messages appears in the multifunction display, have the BAS and ESP checked at your authorized Mercedes-Benz Light Truck Center as soon as possible. For warning messages and malfunction indicator lamps, see page 264 and page 272.

With the BAS malfunctioning the ABS, ESP and 4-ETS are also switched off. If the ESP warning lamp and the É malfunction indicator lamp come on permanently while the engine is running, a malfunction has been detected in either system. As a result, it is possible that now only partial engine output will be available. If the BAS malfunctions, the brake system functions in the usual manner, but without BAS. If the charging voltage falls below 10 volts, the ESP warning lamp, the É malfunction indicator lamp come on and warning messages appears in the multifunction display, the BAS and the ESP are switched off. When the voltage is above this value again, the malfunction indicator and warning lamp should go out and the BAS is operational.

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Antilock brake system (ABS)

Warning! Do not pump the brake pedal, rather use firm, steady brake pedal pressure. Pumping the brake pedal defeats the purpose for ABS and significantly reduces braking effectiveness.

Important! The ABS improves steering control of the vehicle during hard braking maneuvers. The ABS prevents the wheels from locking up above a vehicle speed of approximately 5 mph (8 km/h) independent of road surface conditions. At the instant one of the wheels is about to lock up, a slight pulsation can be felt in the brake pedal, indicating that the ABS is in the regulating mode. Keep firm and steady pressure on the brake pedal while experiencing the pulsation. Continuous steady brake pedal pressure results in applying the advantages of the ABS, namely braking power and ability to steer the vehicle.

In the case of an emergency brake maneuver keep continuous full pressure on the brake pedal. In this manner only can the ABS be most effective. On slippery road surfaces, the ABS will respond even with light brake pedal pressure because of the increased likelihood of locking wheels. The pulsating brake pedal can be an indication of hazardous road conditions and functions as a reminder to take extra care while driving.

ABS control The ABS malfunction indicator lamp - in the instrument cluster comes on with the electronic key in starter switch position 2 and should go out with the engine running. When the ABS malfunction indicator lamp - in the instrument cluster comes on while the engine is running, it indicates that the ABS has detected a malfunction and has switched off. In this case, the brake system functions in the usual manner, but without antilock assistance. With the ABS malfunctioning, the BAS, ESP and 4-ETS are also switched off. The malfunction indicator lamps come on with the engine running.

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The ABS malfunction indicator lamp - also comes on, when the differential lock is engaged. The ABS is switched off, but there is no malfunction in the system. If the charging voltage falls below 10 volts, the malfunction indicator lamp comes on and the ABS is switched off. When the voltage is above this value again, the malfunction indicator lamp should go out and the ABS is operational. If the ABS malfunction indicator lamp stays illuminated, have the system checked at your authorized Mercedes-Benz Light Truck Center as soon as possible.

Warning! ABS cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase braking or steering efficiency beyond that afforded by the condition of the vehicle brakes and tires or the traction afforded. The ABS cannot prevent accidents, including those resulting from excessive speed in turns, following another vehicle too closely, or aquaplaning. Only a safe, attentive, and skillful driver can prevent accidents. The capabilities of an ABS equipped vehicle must never be exploited in a reckless or dangerous manner which could jeopardize the user’s safety or the safety of others.

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Notes: To alert following vehicles to slippery road conditions you discover, operate your hazard warning flashers as appropriate. Operating the vehicle on a single axle dynamometer should only be done for briefly testing the brakes. To do so, move selector lever to position “N”. The engine must be shut off (electronic key in starter switch position 0 or 1). For ABS malfunction and warning messages, see page 275.

LOW RANGE – ABS During off-road driving a special low range system for the antilock brake system (ABS) is operational with transfer case in position LOW, see page 247. An improved braking action (dig in effect) is obtained for vehicle speeds up to 37 mph (60 km/h) through a change in the ABS control function.

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Four-wheel electronic traction system (4-ETS) With the electronic key in starter switch position 2, the warning lamp v located in the speedometer dial comes on and should go out when the engine is running. The 4-ETS improves vehicle’s ability to utilize available traction, especially under slippery road conditions. The brakes are applied to the spinning wheel and power is transferred to the wheel(s) with traction. The 4-ETS function is available between vehicle speed 0 mph (km/h) and 37 mph (60 km/h). The 4-ETS warning lamp v starts to flash at any vehicle speed, as soon as the tires loose traction and the wheels begin to spin.

Important! If the 4-ETS warning lamp v flashes: • during take-off, apply as little throttle as possible, • while driving, ease up on the accelerator.

Adapt your speed and driving to the prevailing road conditions.

4-ETS Control If the É malfunction indicator lamp and the ESP warning lamp stay illuminated and warning messages appears in the multifunction display with the engine running, a malfunction has been detected. Have the 4-ETS checked at your authorized Mercedes-Benz Light Truck Center as soon as possible. With the ABS malfunctioning, the 4-ETS is also switched off.

Caution! If the vehicle is towed with the front axle raised (see towing the vehicle on page 324), or when testing the parking brake on a brake test dynamometer, the engine must be shut off (electronic key in starter switch position 0 or 1). Otherwise, the electronic traction system will immediately be engaged and will apply the rear wheel brakes.

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Note: In winter operation, the maximum effectiveness of the electronic traction system is only achieved with Mercedes-Benz recommended M+S rated radial-ply tires and/or snow chains.

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Electronic Brake Booster (EBB) The EBB enhances braking effectiveness by allowing the rear brakes to supply a greater proportion of the braking effort without a loss of vehicle stability. If a warning tone sounds for five seconds and the symbols É, v and - are displayed in the instrument cluster, the system has detected a malfunction and is switched off. Have the system checked immediately at an authorized Mercedes-Benz Light Truck Center. Failure to do so could result in an accident, since the enhanced braking effect is not available when the system is switched off.

Note: When the EBB is switched off, every time the engine is started, a warning tone will sound for five seconds and the symbols É and - will light up. In addition, whenever the brakes are applied at speeds exceeding 25 mph (40 km/h), the warning tone sounds for five seconds.

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Electronic stability program (ESP)

Warning! ESP cannot prevent the natural laws of physics from acting on the vehicle, nor can it increase the traction afforded. The ESP cannot prevent accidents, including those resulting from excessive speed in turns, or aquaplaning. Only a safe, attentive, and skillful driver can prevent accidents. The capabilities of an ESP equipped vehicle must never be exploited in a reckless or dangerous manner which could jeopardize the user’s safety or the safety of others.

The ESP enhances directional control and reduces driving wheel spin of the vehicle under various driving conditions. Over-/understeering of the vehicle is counteracted by applying brakes to the appropriate wheel to create a countervailing vehicle movement. Engine torque is also limited. The ESP warning lamp, located in the speedometer dial, starts to flash when ESP is in operation.

Important! If the ESP warning lamp v flashes: • During take-off apply as little throttle as possible. • While driving ease up on the accelerator. • Adapt your speed and driving to the prevailing road

conditions.

• Do not switch off the ESP.

Caution! If the vehicle is towed with the front axle raised (see towing the vehicle on page 324), the engine must be shut off (electronic key in starter switch position 0 or 1). Otherwise, the ESP will immediately be engaged and will apply the rear wheel brakes.

Notes: The yellow ESP warning lamp v in the speedometer dial comes on with the electronic key in starter switch position 2. They should go out with the engine running.

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When testing the parking brake on a brake test dynamometer, the engine must be shut off. Otherwise, the ESP will immediately be engaged and will apply the rear wheel brakes. In winter operation, the maximum effectiveness of the ESP is only achieved with Mercedes-Benz recommended M+S rated radial-ply tires and/or snow chains.

Synchronizing ESP If the power supply was interrupted (battery disconnected or empty), the ESP warning lamp v and warning messages appears in the multifunction display with the engine running. Turn steering wheel completely to the left and then to the right. The ESP warning lamp v and the warning messages in the multifunction display should go out.

If the ESP warning lamp v comes on continuously and warning messages appears in the multifunction display with the engine running, a malfunction has been detected in either system. Only partial engine output will be available. If the BAS malfunctions, the brake system functions in the usual manner, but without BAS, ESP and 4-ETS. If the ESP warning lamp v and the É malfunction indicator lamp come on and warning messages appears in the multifunction display, have the BAS or ESP checked at your authorized Mercedes-Benz Light Truck Center as soon as possible. With the ABS malfunctioning, the BAS, ESP and 4-ETS are also switched off. For warning messages and malfunction indicator lamps, see page 264 and page 272. Driving the vehicle with varied size tires will cause the wheels to rotate at different speeds, therefore the ESP may activate (yellow ESP warning lamp v in speedometer dial comes on). For this reason, all wheels, including the spare wheel, must have the same tire outside diameter.

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ESP control switch

P42.45-2278-26

ESP control switch located in center console. To switch ESP off, press upper half of switch (1). ESP warning lamp v, located in speedometer dial, comes on. To switch ESP on again, press lower half of switch (2). ESP warning lamp v, located in speedometer dial, goes out.

To improve the vehicle’s traction when driving with snow chains, or starting off in deep snow, sand or gravel, or off-road driving, switch off ESP by pressing the upper half of the ESP switch. The ESP warning lamp v, located in the speedometer dial, is continuously illuminated.

Warning! ESP should not be switched off during normal driving other than in circumstances described above. Disabling of the system will reduce vehicle stability in standard driving maneuvers. When the ESP warning lamp is illuminated continuously, the ESP is switched off. Adapt your speed and driving to the prevailing road conditions.

With the ESP system switched off, the engine torque reduction feature is cancelled. Therefore, the enhanced vehicle stability offered by ESP is unavailable. Adapt your speed and driving to the prevailing road conditions. If the ESP is switched off the ABS, BAS and ETS are still available.

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If the ESP is switched off, it will be automatically activated when exceeding a vehicle speed of 37 mph (60 km/h) or exceeding a severity threshold of side acceleration. If one drive wheel loses traction and begins to spin, the brake is applied until the wheel regains sufficient traction. The traction control is available between vehicle speed 0 mph (km/h) and 37 mph (60 km/h).

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Note: Avoid spinning of one drive wheel. This may cause serious damage to the drive train which is not covered by the Mercedes-Benz Limited Warranty. The ESP warning lamp, located in the speedometer dial, starts to flash at any vehicle speed as soon as the tires lose traction and the wheels begin to spin. To return to the enhanced vehicle stability offered by ESP: press lower half of the switch (the ESP warning lamp in the speedometer dial goes out).

Important! If the ESP warning lamp flashes: • during take-off, apply as little throttle as possible, • while driving, ease up on the accelerator.

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Transfer case

The switch is located in the center console.

1 Off-road position “LOW” (L) (approximately

1/2 speed). This position is intended for driving off-road and for steep gradients. The transmission will not upshift automatically to the next higher gear range, when driving on the rpm limit.

2 Road position “HIGH” (H).

3 Transfer case indicator 4 Gear range indicator

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Switching transfer case

Switching from “HIGH” to “LOW”: • The shift procedure can only be performed with the

engine running.

• The vehicle speed must not exceed 25 mph

(40 km/h).

• Move selector lever for the automatic transmission

to position “N”, see page 207.

Press the “LOW” switch (1). Once the shift is complete, the gear position “L” is displayed in the transfer case indicator (3). If the multifunction display shows the message “TC SHIFT CONDITIONS NOT FULFILLED”, the shift does not occur. At least one shift condition was not met. Repeat the shift procedure.

Note: Do not depress the accelerator when switching the automatic transmission from position “N” to “D”.

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If the multifunction display shows the message “TC IN NEUTRAL”, the shift does not occur.

Warning! If TC is in neutral, the “P” position of transmission will not hold vehicle. The parking brake must be applied to hold vehicle in place.

The transfer case is in neutral. The gear position “N” is displayed in the transfer case indicator (3). Repeat the shift procedure. If the multifunction display shows the message “TC SHIFT – CANCELLED”, the shift did not take place. Repeat the shift procedure. If the multifunction display shows the message “TRANSFER CASE – VISIT WORKSHOP!”, there is a malfunction in the system. Have the vehicle checked at your authorized Mercedes- Benz Light Truck Center as soon as possible. For malfunction and warning messages in the multifunction display, see page 272.

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Note: If the electronic key is in starter switch position 0 or 1, an alarm will sound if the transfer case is in position “N” and the drivers door is opened. Engage transfer case to gear position “HIGH” or “LOW”.

Switching from “LOW” to “HIGH”: • The shift procedure can only be performed with the

engine running.

• The vehicle speed must not exceed 40 mph

(70 km/h).

• Move selector lever for the automatic transmission

to position “N”, see page 207.

Press the “HIGH” switch (2). Once the shift is complete, the gear position “H” is displayed in the transfer case indicator (3). If the multifunction display shows the message “TC SHIFT CONDITIONS NOT FULFILLED”, the shift does not occur. At least one shift condition was not met. Repeat the shift procedure.

Note: Do not depress the accelerator when switching the automatic transmission from position “N” to “D”.

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250

Note: If the electronic key is in starter switch position 0 or 1, an alarm will sound if the transfer case is in position “N” and the drivers door is opened. Engage transfer case to gear position “HIGH” or “LOW”.

If the multifunction display shows the message “TC IN NEUTRAL”, the shift does not occur.

Warning! If TC is in neutral, the “P” position of transmission will not hold vehicle. The parking brake must be applied to hold vehicle in place.

The transfer case is in neutral. The gear position “N” is displayed in the transfer case indicator (3). Repeat the shift procedure. If the multifunction display shows the message “TC SHIFT – CANCELLED”, the shift did not take place. Repeat the shift procedure. If the multifunction display shows the message “TRANSFER CASE – VISIT WORKSHOP!”, there is a malfunction in the system. Have the vehicle checked at your authorized Mercedes- Benz Light Truck Center as soon as possible. For malfunction and warning messages in the multifunction display, see page 272.

J_G463.book Seite 251 Mittwoch, 19. September 2001 8:06 08

A few words about differentials and differential locks When a vehicle negotiates a turn, wheels on the outside of the curve must travel farther and rotate faster than the inside wheels. The differential, the operation of a set of gears that allow the powered wheels in a vehicle to turn a different speeds, provides for this essential function. The drawback is that the differential also sends most of the engine's power to the wheel with the least load or strain on it. For example, if one of a vehicle's powered wheels sits on a patch of snow and spins because there is no traction, all of the engine's power will go to that wheel because the power will take the path of least resistance. Meanwhile, the opposite wheel, sitting on dry pavement where it could get enough grip to start the vehicle moving, sits idle because it gets no power. The Electronic Traction System (ETS) addresses this problem and provides for good control and steering ability by automatically slowing the slipping wheel and thus increasing the power to the other non-slipping drive wheels to get the vehicle moving. The ESP and ETS in this vehicle feature such intelligent limited-slip differential technology, ideally suited for on-road and

light off-road driving. The position “LOW” of the transfer case (see pages 247and 226) also enhances off-road driving capabilities. More extreme off-road conditions may call for another cure which is to engage a differential lock, preventing the differential from operating altogether. This vehicle offers as standard equipment three differential locks: front, transfer case (center), and rear. Each can be engaged simply by pushing a dashboard-mounted button (see pages 253 and 254 for engaging differential locks). When the transfer case (center) differential is locked, half of the engine's power is automatically distributed to the front wheels and half to the rear wheels. When the rear differential is locked, power going to the rear wheels is equally distributed, so that both rear wheels turn at the same speed and torque. When the front differential is locked, all four wheels now turn with equal power and torque. Please be aware that engaging the differential locks will significantly reduce steering ability of the vehicle.

Driving systems

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Operation

Driving

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251

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252

It is important to understand that during on-road/paved driving, differentials are absolutely required to provide essential control and steering ability of the vehicle. The differential locks, therefore, must not be engaged when driving on paved roads and should only be used when and to the extent necessary to negotiate off-road conditions not addressable by the systems (automatic ETS, ESP; manual switch position “LOW” of transfer- case) this vehicle comes equipped with.

J_G463.book Seite 253 Mittwoch, 19. September 2001 8:06 08

Differential locks

The switch is located in the center console.

6 The ESP, BAS and ABS are switched off

1 Transfer case (center) differential lock 2 Rear axle differential lock 3 Front differential lock 4 Engagement indicator lamps (yellow) 5 Function indicator lamp (red)

The differential locks can only be switched on in the following sequence. • Transfer case differential lock • Rear axle differential lock • Front differential lock

Driving systems

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253

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Important! Do not engage the front axle differential lock when driving around tight corners as steering ability is restricted. When the transfer case differential lock is activated, the ESP, ABS and BAS are automatically switched off. The ABS malfunction indicator lamp and the ESP warning lamp in the instrument cluster come on. Further appear alternately the messages “ESP NOT ACTIVE – LOCK ACTIVE”, “BAS NOT AVAILABLE – LOCK ACTIVE” and “ABS NOT ACTIVE – LOCK ACTIVE” in the multifunction display. The differential locks should be engaged when driving off-road, for example: • for driving trough water or • when driving on deep snow, icy or fouled surfaces.

For notes on off-road driving, see page 226.

254

To engage differential locks:

Warning! Never drive on pavement with activated differential locks.

Important! To avoid damage to the transfer case and differential locks: • Engage differential locks only at low speed

(walking speed, not more than 5 mph).

• Do not engage differential locks if the driving

wheels are spinning.

J_G463.book Seite 255 Mittwoch, 19. September 2001 8:06 08

The function indicator lamp (5) comes on when the differential lock engagement procedure has been completed. The ABS malfunction indicator lamp and the ESP warning lamp in the instrument cluster come on. Further appear alternately the messages “ESP NOT ACTIVE – LOCK ACTIVE”, “BAS NOT AVAILABLE – LOCK ACTIVE” and “ABS NOT ACTIVE – LOCK ACTIVE” in the multifunction display. Only apply the accelerator lightly when driving off.

Briefly press the switch for the differential lock required. The corresponding engagement indicator lamp (4) comes on. The ESP warning lamp in the instrument cluster comes on and the message “ESP NOT ACTIVE – LOCK SELECTED” appears.

Driving systems

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255

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Methods to disengage differential locks There are two different methods to disengage differential locks: • Disengage differential locks in reverse order. When

the rear axle differential lock is disengaged, the front axle differential lock is automatically disengaged with it. Briefly press the previously activated switches for the differential lock. The correspondending engagement indicator lamp (4) goes out.

• If the transfer case differential lock is disengaged,

all other differential locks are automatically disengaged. Briefly press the switch (1) for the transfer case differential lock. The engagement indicator lamps (4) go out.

The function indicator lamp (5) goes out when the disengagement procedure has been completed.

256

Only when all function indicator lamps (5) have gone out, the ABS malfunction indicator lamp and the ESP warning lamp in the instrument cluster go out and the messages “ESP NOT ACTIVE – LOCK ACTIVE”, “BAS NOT AVAILABLE – LOCK ACTIVE” and “ABS NOT ACTIVE – LOCK ACTIVE” in the multifunction display disappear. Now the message “ESP – NOT AVAILABLE” appears in the multifunction display and the ESP warning lamp comes on. That means the ESP, BAS and ABS functions are not active yet. To activate the systems again drive for 3 seconds with a constant drive behavior. Note: If the function lamps do not go out when the differential locks are disengaged, make minor changes to the vehicles direction.

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Important! When running on a (single-axle) dynamometer – no matter how briefly – the non driven axle must be raised or its drive shaft disconnected. The transfer differential lock must be engaged. Otherwise the transfer case can be damaged, which is not covered by the Mercedes-Benz Limited Warranty.

Warning! Never drive on pavement with activated differential locks. Steering control will be strongly affected with the front differential lock activated. ABS, BAS and ESP are switched off automatically when the transfer case differential lock is activated.

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257

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What you should know at the gas station

258

What you should know at the gas station

Fuel supply

Warning! Gasoline is highly flammable and poisonous. It burns violently and can cause serious injury. Whenever you are around gasoline, avoid inhaling fumes and skin contact, extinguish all smoking materials. Never allow sparks, flame or smoking materials near gasoline!

Open flap by pushing at rear (arrow). Turn fuel cap to the left and hold on to it until possible pressure in tank has been released, then remove cap. Failure to remove slowly could result in personal injury. The fuel filler cap is tethered to the fuel filler neck. Do not drop the cap. It could damage the vehicle paint finish. Manual release of fuel filler flap, see page 347.

Important! When refueling vehicle make certain that no gasoline comes into contact with plastic taillamp, to prevent damaging the lens.

Fuel To prevent fuel vapors from escaping into open air, fully insert filler nozzle unit. Only fill fuel tank until the filler nozzle unit cuts out – do not top up or overfill.

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Warning! Overfilling of fuel tank may result in creating pressure in the system which could cause a gas discharge such as the gas spraying back out upon removing the filler nozzle which could cause personal injury.

Leaving the engine running and the fuel cap open can cause the “CHECK ENGINE” lamp to illuminate. Fuel tank capacity approximately 25.4 US gal (96.0 l). This includes approximately 5.3 US gal (20.0 l) reserve. Use premium unleaded gasoline: Posted Octane Index 91 (Average of 96 RON/86 MON).

• Engine oil

Engine oil level check, see page 127 and page 304. Fill quantity between upper and lower dipstick marking level: 2.1 US qt (2.0 l). Recommended engine oils, see Approved Service Products sheet.

• Coolant

For normal replenishing, use water (potable water quality). For further information (e.g. anticorrosion/ antifreeze), see page 306 and 365.

• Spark plugs

Approved spark plugs, see page 360.

• Tire pressure

For tire pressure, refer to tire pressure label inside the fuel filler flap. See page 318 for further details.

• Air conditioner

R-134a refrigerant and special PAG lubricant, see page 363.

What you should know at the gas station

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• Bulbs Front: high and low beam: H4 60/55W 12V fog lamp: H3 55W 12V standing and parking lamp: T 4W 12V turn signal lamp: PY 21W 12V (1156NA[cp 32]) Side: side marker lamp yellow: T 4W 12V side marker lamp red: T 4W 12V turn signal lamp: WY 5W 12V 5W Rear: tail lamp: R 5W 12V stop lamp: P 21W 12V turn signal lamp: PY 21W 12V backup lamp: P 21W 12V fog lamp: P 21W 12V license plate lamp: C 5W 12V (tubular)

J_G463.book Seite 261 Mittwoch, 19. September 2001 8:06 08

Check regularly and before a long trip

1 Engine oil level

See “Checking engine oil level” on page 304 and “Engine oil level indicator” on page 127.

2 Coolant level

See “Coolant level” on page 306.

3 Brake fluid

See “Brake fluid” on page 363. 4 Windshield washer system/ Headlamp cleaning system/ Rear window washer system For refilling reservoir see page 307.

Opening hood, see page 302. Vehicle lighting: Check function and cleanliness. For replacement of light bulbs, see “Exterior lamps” on page 328. Exterior lamp switch, see page 129.

Check regulary and before a long trip

261

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J_G463.book Seite 263 Mittwoch, 19. September 2001 8:06 08

Instrument cluster display

Malfunction and indicator

lamps in the instrument cluster ....................264
On-board diagnostic system .........265

Check engine malfunction indicator lamp .............................265
Brake warning lamp ..................266
Supplemental restraint system (SRS) indicator lamp ..................267
Fuel reserve warning .................268
ABS malfunction indicator lamp .............................269
Electronic stability program (ESP) — warning lamp ...............270

Seat belt nonusage

warning lamp .............................270

Malfunction and indicator lamp

in the center console ................ 271
AIRBAG OFF indicator lamp ..... 271

Malfunction and warning

messages in the multifunction display .............. 272
DISPLAY DEFECTIVE (engine control unit) ................. 273
DISPLAY DEFECTIVE (several systems) ....................... 273
BATTERY / ALTERNATOR ........274
ANTILOCK BRAKE SYSTEM .... 275
BRAKE ASSIST ............................276
BRAKE PAD WEAR .................... 277
BRAKE FLUID ............................ 277
PARKING BRAKE ....................... 278
SEAT BELT SYSTEM .................. 278
ELEC. STABIL. PROG. (Electronic stability program) . 279
COOLANT (coolant level) ............................. 280
COOLANT (coolant temperature) ............... 281
ENGINE OIL LEVEL ................... 282

LIGHTING SYSTEM ....................283
LIGHT SENSOR ...........................285
DOOR ...........................................285
TRUNK OPEN .............................286
HOOD ...........................................286
TELEPHONE – FUNCTION .......287
TELE AID .....................................287
WASHER FLUID .........................288
RESTRAINT SYSTEM .................289
KEY ...............................................289
FUEL RESERVE ..........................290
UNDERVOLTAGE ........................290
ELECTRONIC BRAKE BOOSTER (EBB) ............................................291
ENGINE AIR FILTER ..................291
TC SHIFT ....................................292
TC SHIFT CONDITIONS ............292
TC IN NEUTRAL .........................293
TRANSFER CASE .......................293

Contents - Instrument cluster display

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264

Warning! Inhalation of exhaust gas is hazardous to your health. All exhaust gas contains carbon monoxide, and inhaling it can cause unconsciousness and lead to 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.

Malfunction and indicator lamps in the instrument cluster General information: If a bulb in the instrument cluster fails to light up during the bulb self-check when turning the key in starter switch to position 2, have it checked and replaced if necessary.

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, of course, will function properly only when maintained strictly according to factory specifications. Any adjustments on the engine should, therefore, be carried out only by authorized Mercedes-Benz Light Truck Center qualified technicians. Engine adjustments should not be altered in any way. Moreover, the specified service jobs must be carried out regularly according to Mercedes-Benz servicing requirements. For details refer to the Service Booklet.

J_G463.book Seite 265 Mittwoch, 19. September 2001 8:06 08

On-board diagnostic system Check engine malfunction indicator lamp

Engine malfunction indicator lamp. If the “CHECK ENGINE” malfunction indicator lamp comes on when the engine is running,

it indicates a malfunction of the fuel management system, emission control system, systems which impact emissions, or the fuel cap is not closed tight (check the fuel cap). If the “CHECK ENGINE” lamp is illuminated continuously and the vehicle is driving normally, you may still drive the vehicle, however, in all cases, we recommend that you have the system checked at your authorized Mercedes-Benz Light Truck Center as soon as possible. If the “CHECK ENGINE” lamp comes on continuously and/or the vehicle is not driving normally (e.g. malfunction of the fuel management system or running out of fuel), serious damage can occur to the emission system. Please contact your authorized Mercedes-Benz Light Truck Center immediately.

The Sequential Multiport Fuel Injection (SFI) control module monitors emission control components that either provide input signals to or receive output signals from the control module. Malfunctions resulting from interruptions or failure of any of these components are indicated by the “CHECK ENGINE” malfunction indicator lamp in the instrument cluster and are simultaneously stored in the SFI control module. If the “CHECK ENGINE” malfunction indicator lamp comes on, have the system checked at your authorized Mercedes-Benz Light Truck Center as soon as possible. With some exceptions, the control module switches off the “CHECK ENGINE” malfunction indicator lamp if the condition, causing the lamp to come on, no longer exists during three consecutive cycles. An on-board diagnostic connector is located in passenger compartment on the driver’s side near hood lock release on the upper left of footwell, allowing the accurate identification of system malfunctions through the readout of diagnostic trouble codes.

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Brake warning lamp

Except Canada

Canada only

When the brake warning lamp and message appear while the engine is running, this means: • there is insufficient brake fluid in the reservoir (engine running and parking brake released), or

• the parking brake is set (engine running).

If a warning tone sounds for 5 seconds and the warning lamps É and - are displayed in the instrument cluster, the electronic brake booster (EBB) has a malfunction and is switched off. See page 242 for notes on the electronic brake booster (EBB).

Warning! Driving with the brake warning lamp illuminated can result in an accident. Have your brake system checked immediately if the brake warning lamp stays on. Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be seriously burned.

Note: If you find that the minimum mark on the brake fluid reservoir is reached, have the brake system checked for brake pad thickness and leaks.

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Supplemental restraint system (SRS) indicator lamp When turning the electronic key in starter switch to position 1 the indicator lamp “SRS” in the instrument cluster comes on. If no

fault is detected, the lamp will go out after approximately 4 seconds. When turning the electronic key in starter switch to position 2 the indicator lamp “SRS” in the instrument cluster comes on. If no fault is detected, the lamp will go out when the engine is running. The operational readiness of the airbag system is verified by the indicator lamp “SRS” in the instrument cluster when turning the electronic key in starter switch to position 1 or 2. After the lamp goes out, the system continues to monitor the components and circuitry of the airbag system and will indicate a malfunction by coming on again.

Warning! In the event a malfunction of the “SRS” is indicated as outlined above, the “SRS” may not be operational. For your safety, we strongly recommend that you visit an authorized Mercedes-Benz Light Truck Center immediately to have the system checked; otherwise the “SRS” may not be activated when needed in an accident, which could result in serious or fatal injury, or it might deploy unexpectedly and unnecessarily which could also result in injury.

See page 66 for notes on airbags, see page 71 for belt tensioners and page 73 for infant and child seat restraint.

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