2012 Mercedes-benz GL Class Owners Manual

braking inputs to avoid a potentially dangerous situation. Do not wait for the operation of the warning signal to intercede with your own braking. This will result in potentially dangerous emergency braking which will not always result in an impact being avoided. Tailgating increases the risk of an accident.

G WARNING DISTRONIC brakes your vehicle with a maximum deceleration of 13 ft/s2(4 m/s2). This corresponds to approximately 40% of your vehicle's maximum possible braking power. You must apply the brakes yourself to avoid a collision. DISTRONIC brakes the vehicle to restore the set distance to the vehicle in front or to restore the set speed. In this case, the brake pedal is depressed automatically, which can be seen by a movement of the brake pedal. Always keep the driver's footwell clear, including the area under the brake pedal. Objects in this area may impair pedal movement and cause the DISTRONIC braking function to malfunction. Do not place your foot under the brake pedal – your foot could become caught.

DISTRONIC displays in the multifunction display X Press the V or U button to select the DISTRONIC menu (Y page 219). Display when DISTRONIC is deactivated When DISTRONIC is deactivated, you will see the following in the multifunction display:

: Vehicle in front, if detected ; Distance indicator, displaying current

distance to the vehicle in front

= Specified minimum distance to the

vehicle in front, adjustable

? Own vehicle

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Display when DISTRONIC is activated After this time, you will see the following in the multifunction display while DISTRONIC is activated:

: DISTRONIC activated ; Stored speed When activating DISTRONIC and when setting the speed, stored speed ; appears for around five seconds. After approximately five seconds, current saved speed ; is displayed in the multifunction display's status indicator: RUSA only: DTR XXX Miles RCanada only: DTR XXX km/h Deactivating DISTRONIC

There are several ways to deactivate DISTRONIC: X Briefly press the cruise control lever

forwards :.

or X Brake. i The last speed stored remains stored until

you switch off the engine.

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The Distronic regulates only the distance between your vehicle and those directly ahead of it, but does not register stationary objects in the road, e.g.: Ra stopped vehicle in a traffic jam Ra disabled vehicle Ran oncoming vehicle The driver must always be alert, observe all traffic and intercede as required by means of steering or braking the vehicle. G WARNING The Distronic should not be used in snowy or icy road conditions.

Cornering, going into and coming out of a bend

The ability of DISTRONIC to detect vehicles when cornering is limited. Your vehicle may brake unexpectedly or late. Vehicles traveling on a different line

i DISTRONIC is not deactivated if you depress the accelerator pedal. If you accelerate to overtake, DISTRONIC adjusts the vehicle's speed to the last speed stored after you have finished overtaking.

DISTRONIC is automatically deactivated if: Ryou apply the parking brake. Ryou are driving slower than

20 mph (25 km/h) and there is no vehicle in front, or if the vehicle in front is no longer detected.

RESP® intervenes or you deactivate ESP®. Ryou shift the transmission to P, R or N. If DISTRONIC is deactivated, you will hear a warning tone. You will see the DISTRONIC Off message in the multifunction display for approximately five seconds.

Tips for driving with DISTRONIC The following contains descriptions of certain road and traffic conditions in which you must be particularly attentive. In such situations, brake if necessary. DISTRONIC is then deactivated. G WARNING The Distronic works to maintain the speed selected by the driver unless a moving obstacle proceeding directly ahead of it in the same travel direction is detected (e.g. following another vehicle ahead of you at your set distance). This means that: RYour vehicle can pass another vehicle after

you have changed lanes.

RWhile in a sharp turn or if the preceding vehicle is in a sharp turn, the Distronic could lose sight of the preceding vehicle. Your vehicle could then accelerate to the previously selected speed.

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Obstructions and stationary vehicles

DISTRONIC may not detect vehicles traveling on a different line. The distance to the vehicle in front will be too short. Other vehicles changing lane

DISTRONIC has not detected the vehicle cutting in yet. The distance to this vehicle will be too short. Narrow vehicles

DISTRONIC does not brake for obstructions or stationary vehicles. If, for example, the detected vehicle turns a corner and reveals an obstacle or stationary vehicle, DISTRONIC will not brake for these. Crossing vehicles

DISTRONIC has not yet detected the vehicle in front on the edge of the road, because of its narrow width. The distance to the vehicle in front will be too short.

DISTRONIC may detect vehicles that are crossing your lane by mistake. Activating DISTRONIC at, for example, a traffic light with crossing traffic, could cause your vehicle to pull away at the wrong time.

Level control Important safety notes Level control adapts the vehicle level automatically to the current operating and driving situation. This results in reduced fuel consumption and improved handling. For vehicles with ADS: when you are driving in ADS COMF or ADS AUTO(Y page 195), the vehicle is lowered to high-speed level as

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the speed increases. As the vehicle decelerates, the vehicle is raised back up to highway level. In ADS SPORT(Y page 195), the vehicle skips highway level and is lowered directly to high-speed level. Make changes to the vehicle level while the vehicle is in motion. This enables the vehicle to adjust to the new level as quickly as possible. The vehicle level may change visibly when you park the vehicle and the outside temperature changes. When the temperature drops, the vehicle level is lower; with an increase in temperature, the vehicle level rises. When you unlock the vehicle or open a door, the vehicle begins to balance the load discrepancies while still parked. However, for significant level changes, e.g. after the vehicle has been stationary for a long period, the engine must be on. For safety reasons, the vehicle is only lowered when the doors are closed. Lowering is interrupted if a door is opened and continues once the door has been closed. G WARNING Make sure that nobody is in the vicinity of the wheel arch or the underbody when changing the vehicle level. You could otherwise trap yourself or others. G WARNING Always select as low a vehicle level as possible. If the vehicle level is high, the vehicle center of gravity shifts upwards. This increases the risk of the vehicle tipping over. Adapt your driving style to suit the vehicle level. ESP® cannot reduce the risk of an accident if you drive too fast. ESP® cannot override the laws of physics.

! When driving on extremely rough terrain,

select a high vehicle level in good time. Make sure that there is always sufficient ground clearance to prevent damage to the vehicle.

23 Distance from ground: 8.5 in (217 mm)

! Remove the key from the ignition before

raising one or more wheels with the appropriate equipment.

For information about driving off-road, see (Y page 174).

Vehicles without extended Off-Road Pro engineering package Basic setting The extent to which the vehicle is raised or lowered depends on the basic setting selected. Select: RRaised level, for driving on normal off-road

terrain

RHighway/high-speed level for normal roads The individual vehicle levels differ from highway level as follows: R+2.3 in (+ 60 mm) at the raised level R+/–0 in (+/–0 mm) at the highway level23
R–0.6 in (–15 mm) at the high-speed level Raised level Only select raised level when this is appropriate for the road conditions. Otherwise, fuel consumption increases and handling performance may be affected. Your selection remains stored even if you remove the SmartKey from the ignition lock.

X Start the engine. If indicator lamp ; is not lit:

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X Press button :.

The vehicle rises to raised level.

While the adjustment is taking place, a message appears in the multifunction display, e.g.:

X Start the engine. If indicator lamp ; is lit: X Press button :.

The vehicle is adjusted to the highway level.

While the adjustment is taking place, a message appears in the multifunction display, e.g.:

If you press the V, U, & or * button on the multifunction steering wheel, then the message will disappear. Once raised level has been reached, you will then see a message in the multifunction display, for example:

If you press the V, U, & or * button on the multifunction steering wheel, the message will disappear. Once highway level has been reached, then all indicator lamps = go out. You will see a message in the multifunction display, for example:

If you have not previously selected the off- road menu (Y page 222) in the on-board computer, then the message disappears after about five seconds. Highway/high-speed level ! Make sure that there is enough ground

clearance when the vehicle is being lowered. It could otherwise hit the ground, damaging the underbody.

If you have not previously selected the off- road menu (Y page 222) in the on-board computer, the message disappears after about five seconds. The vehicle automatically adjusts to highway level when you drive faster than 55 mph (88 km/h). Depending on the ADS setting, the vehicle is lowered to high-speed level at higher speeds. i If a trailer is being towed, the vehicle is

not lowered to high-speed level.

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Vehicles with extended Off-Road Pro engineering package Basic settings The extent to which the vehicle is raised or lowered depends on the basic setting selected. Select: ROff-road level 3 for freeing the vehicle in

impassable terrain at low speeds only

ROff-road level 2 for driving on normal off-

road terrain

ROff-road level 1 for driving on easily

negotiable off-road terrain

RHighway/high-speed level for normal roads The individual vehicle levels differ from highway level as follows: R+3.5 in (+ 90 mm) at off-road level 3
R+2.3 in (+ 60 mm) at off-road level 2
R+1.2 in (+ 30 mm) at off-road level 1
R+/–0 in (+/–0 mm) at the highway level R–0.6 in (–15 mm) at the high-speed level Off-road levels G WARNING Vehicle off-road level 3 is not intended for use on paved roads. This vehicle level is intended for clearing impracticable situations at low speed exclusively. The vehicle has a very high center of gravity in off-road level 3. This increases the overturning hazard. RSelect off-road level 3 exclusively for

clearing impracticable situations at low speed.

RAdapt your driving style to the modified

conditions.

RDo not exceed a speed of 12 mph

(20 km/h).

RAvoid extreme, quick steering movements. RKeep in mind the vehicle's driving

characteristics are modified.

You should therefore drive in off-road level 3
with particular caution as it could otherwise

lead to an accident and/or serious injury to you or others.

If you drive too fast at off-road level 3, then the Reduce speed to below 12 mph (20 km/h) message appears in the multifunction display. You also hear a warning. The vehicle is lowered. i You cannot clear these messages. Only select an off-road level when this is appropriate for road conditions. Otherwise, fuel consumption increases and handling performance may be affected. Your selection remains stored even if you remove the SmartKey from the ignition lock.

X Start the engine. X Turn the selector wheel clockwise :.

The vehicle is raised.

or X Turn selector wheel ; counter-clockwise.

The vehicle is lowered.

Indicator lamps = for the desired off-road level flash: ROff-road level 1: the lower indicator lamp

flashes

ROff-road level 2: the lower and center

indicator lamps flash

ROff-road level 3: all three indicator lamps

flash

The vehicle is being adjusted to the off-road level selected. As soon as an off-road level is reached, the corresponding indicator lamp stops flashing and lights up constantly.

While the adjustment is taking place, a message appears in the multifunction display, e.g.:

Once off-road level 3 has been reached, you will see a message in the multifunction display, for example:

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The vehicle is raised from off-road level 1 to off-road level 2. If you press the V, U, & or * button on the multifunction steering wheel, the message will disappear. Once off-road level 2 has been reached, you will see a message in the multifunction display, for example:

If you drive faster than 12 mph (20 km/h) at off-road level 3, the following message appears in the multifunction display:

Lower and center indicator lamps = are on. If you have not previously selected the off- road menu (Y page 222) in the on-board computer, the message disappears after about five seconds. The Max. speed 12 mph (20 km/h) message draws your attention to the maximum permissible speed for off-road level 3. While the adjustment from off-road level 2 to off-road level 3 is taking place, you will see a message such as the following in the multifunction display:

Off-road level 3 is canceled. If you then increase the speed again, the message remains in the multifunction display. The newly set level is not displayed until the vehicle has been set to a level suitable for the current speed. If you maintain or reduce your speed, you will see a message such as the following in the display while the vehicle is being lowered:

The vehicle is lowered to off-road level 2. Once off-road level 2 has been reached, you will see a message in the multifunction display, for example:

194 Driving systems

25 mph (40 km/h), the vehicle is raised back to highway level. Highway/high-speed level ! Make sure that there is enough ground

clearance when the vehicle is being lowered. It could otherwise hit the ground, damaging the underbody.

: To raise the level ; To lower the level = Indicator lamps X Start the engine. If one or more indicator lamps = are on: X Turn the selector wheel counter-

clockwise ; until all indicator lamps = that are lit start to flash. The vehicle is lowered to highway level. As soon as the next lowest level is reached, the indicator lamp stops flashing and goes out.

While the adjustment is taking place, a message appears in the multifunction display, e.g.:

If you select an off-road level when driving at too high a speed, the Level selection not permitted message appears in the multifunction display. You can select the following: Roff-road level 1 up to 60 mph(96 km/h) Roff-road level 2 up to 40 mph(64 km/h) Roff-road level 3 up to 12 mph(20 km/h) If you drive faster than 55 mph (88 km/h), or for longer than 20 seconds between 40 mph (64 km/h) and 55 mph (88 km/h), then off- road level 2 is canceled. The vehicle is lowered to off-road level 1. You will see a message in the multifunction display, for example:

If you drive faster than 60 mph (96 km/h), off- road level 1 is canceled. The vehicle is lowered to highway level.^^ You will see a message in the multifunction display, for example:

Depending on the ADS setting (Y page 195), the vehicle is lowered to high-speed level at high speeds. If you return to a speed below

If you press the V, U, & or * button on the multifunction steering wheel, the message will disappear.

Once highway level has been reached, all indicator lamps = go out. You will see a message in the multifunction display, for example:

If you have not previously selected the off- road menu (Y page 222) in the on-board computer, the message disappears after about five seconds. The vehicle automatically adjusts to highway level when you drive faster than 60 mph(115 km/h). Depending on the ADS setting (Y page 195), the vehicle is lowered to high-speed level at high speeds. i If a trailer is being towed, the vehicle is

not lowered to high-speed level.

ADS (Adaptive Damping System) ADS is continuously electronically-controlled. It adapts the damping characteristics to suit the current operating conditions. The damping is controlled for each wheel individually. This improves driving safety and tire comfort. This depends on: Ryour driving style Rthe road surface conditions Rthe ADS setting Rthe vehicle level setting Your selection remains stored even if you remove the SmartKey from the ignition lock.

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Vehicles without extended Off-Road Pro engineering package

Vehicles with extended Off-Road Pro engineering package You can choose between the following ADS settings: RAUTO for normal driving situations; indicator lamps ; and = are off. RSPORT for sporty driving; indicator

lamp ; is on. In comparison with AUTO or COMF, the vehicle is lowered by 0.6 in(15 mm).

RCOMF for a more comfortable ride;

indicator lamp = is on.

X Start the engine. X Press button : repeatedly until the

desired setting is selected.

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PARKTRONIC Important safety notes G WARNING The PARKTRONIC is a supplemental system. It is not intended to, nor does it replace, the need for extreme care. The responsibility during parking and other critical maneuvers always remains with the driver. G WARNING Make sure no persons or animals are in or near the area in which you are parking/ maneuvering. Otherwise, they could be injured.

PARKTRONIC is an electronic parking aid with ultrasonic sensors. It indicates visually and audibly the distance between your vehicle and an object. PARKTRONIC is activated automatically when you: Rswitch on the ignition Rshift the transmission to position D, R or N Rrelease the parking brake PARKTRONIC is deactivated at speeds above 11 mph (18 km/h). It is reactivated at lower speeds. PARKTRONIC monitors the area around your vehicle using six sensors in the front bumper and four sensors in the rear bumper.

: Sensors in the front bumper, left-hand

side (example)

Range of the sensors General notes The sensors must be free of dirt, ice and slush; otherwise they may not function correctly. Clean the sensors regularly, taking care not to scratch or damage them (Y page 309).

Side view

Top view Front sensors Center

Corners

Rear sensors Center

Corners

Approximately 40 in (approximately 100 cm) Approximately 24 in (approximately 60 cm)

Approximately 48 in (approximately 120 cm) Approximately 32 in (approximately 80 cm)

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! When parking, pay particular attention to objects above or below the sensors, such as flower pots or trailer drawbars. PARKTRONIC does not detect such objects when they are in the immediate vicinity of the vehicle. You could damage the vehicle or the objects. The sensors may not detect snow and other objects that absorb ultrasonic waves. Ultrasonic sources such as an automatic car wash, the compressed-air brakes on a truck or a pneumatic drill could cause PARKTRONIC to malfunction. PARKTRONIC may not function correctly on uneven terrain.

Warning display for the front area : Segments on the left-hand side of the

vehicle

; Segments on the right-hand side of the

vehicle

Minimum distance Center

Corners

Approximately 8 in (approximately 20 cm) Approximately 6 in (approximately 15 cm)

If there is an obstacle within this range, the relevant warning displays light up and a warning tone sounds. If the distance falls below the minimum, the distance may no longer be shown.

Warning displays The warning displays show the distance between the sensors and the obstacle. The warning display for the front area is located on the dashboard above the center air vents. The warning display for the rear area is in the roof lamp in the rear compartment.

= Segments showing operational readiness The warning display for each side of the vehicle is divided into five yellow and two red segments. PARKTRONIC is operational if yellow segments showing operational readiness = light up. The selected transmission position determines which warning display is active when the engine is running. Transmission position R or N

Warning display

Front area activated Rear and front areas activated No areas activated

One or more segments light up as the vehicle approaches an obstacle, depending on the vehicle's distance from the obstacle. From the: Rsixth segment onwards, you will hear an

intermittent warning tone for approximately two seconds.

Rseventh segment onwards, you will hear a

warning tone for approximately two seconds. This indicates that you have now reached the minimum distance.

an obstacle from the bumper, not the ball coupling.

! Vehicles with an exterior spare wheel:

Remove the detachable ball coupling if the trailer tow hitch is not required. PARKTRONIC measures the minimum detection range to an obstacle from the bumper, not the ball coupling.

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Deactivating/activating PARKTRONIC

Vehicles without the Enhanced Off-Road Pro Engineering Package : To deactivate/activate PARKTRONIC ; Indicator lamp

Vehicles with the Enhanced Off-Road Pro Engineering Package : To deactivate/activate PARKTRONIC ; Indicator lamp If indicator lamp ; lights up, PARKTRONIC is deactivated. i PARKTRONIC is automatically activated when you turn the SmartKey to position 2
in the ignition lock.

Trailer towing PARKTRONIC is deactivated for the rear area when you establish an electrical connection between your vehicle and a trailer. ! Fold in the ball coupling if the trailer tow

hitch is not required. PARKTRONIC measures the minimum detection range to

Problems with PARKTRONIC

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199

Problem Only the red segments in the PARKTRONIC warning displays are lit. You also hear a warning tone for approximately two seconds. PARKTRONIC is deactivated after approximately 20 seconds, and the indicator lamp in the PARKTRONIC button lights up.

Only the red segments in the PARKTRONIC warning displays are lit. PARKTRONIC is deactivated after approximately 20
seconds.

Possible causes/consequences and M Solutions PARKTRONIC has malfunctioned and has switched off. X If problems persist, have PARKTRONIC checked at a qualified

specialist workshop.

The PARKTRONIC sensors are dirty or there is interference. X Clean the PARKTRONIC sensors (Y page 309). X Switch the ignition back on. The problem may be caused by an external source of radio or ultrasound waves. X See if PARKTRONIC functions in a different location.

Rear view camera Important safety notes The rear view camera is an optical parking aid. It shows the area behind your vehicle in the COMAND display. G WARNING Make sure that no persons or animals are in the maneuvering range. Otherwise, they could be injured.

The rear view camera is located in the handle strip of the tailgate.

: Rear view camera

View through the camera The area behind the vehicle is displayed as a mirror image, as in the rear-view mirror.

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G WARNING The rear view camera is only an aid and may display obstacles Rfrom a distorted perspective Rinaccurately Rmay not display obstacles at all The rear view camera does not relieve you of the responsibility to be cautious. Take care and pay careful attention. The rear view camera may not show objects which are Rvery close to the rear bumper Runder the rear bumper Rabove the tailgate handle You are responsible for safety at all times and must continue to pay attention to the immediate surroundings when parking and maneuvering. This includes the area behind, in front of, and beside the vehicle. Otherwise you could endanger yourself and/or others. G WARNING The rear view camera will not function or will not fully function if: Rthe tailgate is open Rit is raining or snowing strongly or if it is

foggy

Rit is night or if you are parking/

maneuvering your vehicle in a very dark area

Ra very bright white light is affecting the

camera

Rthe immediate vicinity is illuminated with fluorescent light (the display can flicker)

Rtemperature changes abruptly, for example

if you drive out of the cold into a heated garage (condensation on the lens) Rthe camera lens is dirty or covered Rthe rear of your vehicle is damaged

In this case, have the position and the setting of the camera checked at a specialist workshop. Mercedes-Benz recommends that you consult a Mercedes- Benz Center for this purpose.

Do not use the rear view camera in these situations. You could otherwise injure yourself and other people and/or cause damage - including damage to your vehicle - while parking/maneuvering.

Activating the rear view camera X Make sure that the SmartKey is in position

2 in the ignition lock.

X Make sure that the "rear view camera"

function is selected in COMAND (see the separate operating instructions for COMAND).

X Engage reverse gear.

The area behind the vehicle is shown in the COMAND display with guide lines.

Guide lines in the COMAND display G WARNING Use of rear view camera can be dangerous if you are color-blind or have impaired color vision. Only use rear view camera if you can see and distinguish all colored guidelines shown by rear view camera on the COMAND system display. G WARNING Please note that objects that do not touch the ground may appear to be further away than they actually are, for example: Rthe bumper of a vehicle parked behind you Rthe trailer drawbar Rthe ball coupling of a trailer tow hitch Rthe rear end of a truck Ra slanted post In such cases, you should not use the guide lines to judge the distance. You may misjudge the distance, which increases the risk of impacting the objects. Even if the object you approach is directly on the ground, do not approach the object any closer than the red guide line.

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vehicles, such as motorcycles or bicycles, or may only detect them too late. Monitoring may be affected by dirty sensors, strong spray or poor visibility caused by snow, rain or mist, for example. In this case, vehicles are detected late or not at all. Always pay attention to traffic conditions and your surroundings. Otherwise, you may fail to recognize dangers in time, cause an accident and injure yourself and others.

i USA only:

This device has been approved by the FCC as a “Vehicular Radar System”. The radar sensor is intended for use in an automotive radar system only. Removal, tampering, or altering of the device will void any warranties, and is not permitted by the FCC. Do not tamper with, alter, or use in any non-approved way. Any unauthorized modification to this device could void the user’s authority to operate the equipment.

For Blind Spot Assist to assist you when driving, the radar sensor system must be activated (Y page 227) and operational.

Monitoring range of the sensors Blind Spot Assist monitors the area shown in the figure up to 10 ft (3 m) behind and immediately adjacent to your vehicle.

Information in the COMAND display (example) Guide lines ; and = show the approximate distance to the rear area. Yellow guide line ; indicates a distance of approximately 3 ft (1 m) and red guide line = indicates a distance of approximately 10 in (0.25 m). The distances only apply to objects that are at ground level. Blue guide lines : depict the width required for the vehicle. They are used to align the vehicle with the edge of the road, e.g. the curb.

Blind Spot Assist Important safety notes Blind Spot Assist uses a radar sensor system to monitor the areas on both sides of your vehicle. It begins to work at speeds of approximately 20 mph (30 km/h). A warning display in the exterior mirrors draws your attention to detected vehicles in the monitored area. If you then indicate a turn towards that side before changing lanes, you will also receive visual and audible collision warnings. The Blind Spot Assist monitoring system uses sensors in the rear bumper. G WARNING Blind Spot Assist is only an aid designed to assist driving. It may fail to detect some vehicles and is no substitute for attentive driving. Blind Spot Assist cannot detect road and traffic conditions. It may fail to detect narrow

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Due to the nature of the system: Rwarnings may be issued in error when

driving close to crash barriers or similar solid lane borders.

Rwarnings may be interrupted when driving

alongside particularly long vehicles, for example trucks, for a prolonged time. The two sensors for Blind Spot Assist are integrated into the sides of the rear bumper. Make sure that the bumper is free from dirt, ice or slush around the sensors. The radar sensors must not be covered, for example by bicycle racks or overhanging cargo. Following a severe impact or in the event of damage to the bumpers, have the function of the radar sensors checked at a qualified specialist workshop, such as an authorized Mercedes- Benz Center. Blind Spot Assist may otherwise not work properly.

Indicator and warning display

: Yellow indicator lamp/red warning lamp When Blind Spot Assist is activated, indicator lamp : lights up yellow in the exterior mirrors up to a vehicle speed of 20 mph (30 km/h). When the vehicle speed exceeds 20 mph (30 km/h), the indicator lamp goes out and Blind Spot Assist is ready for use. When your speed exceeds approximately 20 mph (30 km/h), warning lamp : lights up red on the corresponding side whenever a vehicle is detected in the blind spot monitoring range. This warning is always given when a vehicle enters the blind spot monitoring range from behind or from the

G WARNING Blind Spot Assist monitors certain areas in the immediate vicinity of your vehicle. Vehicles that approach and drive past at high speeds are not detected. There is no display and no warning. If the lanes are very wide, it may not be possible to monitor the complete width of the neighboring lane. For this reason, vehicles in the next lane may not be detected, especially if they are driving in a staggered formation. This may be the case if vehicles are driving at that edge of their lane which is furthest away from your vehicle. Always pay attention to traffic conditions and your surroundings. Otherwise, you may fail to recognize dangers in time, cause an accident and injure yourself and others.

If the lanes are narrow, vehicles driving in the lane beyond the lane next to your vehicle may be indicated, especially if the vehicles are not driving in the middle of their lane. This may be the case if the vehicles are driving on the inner side of their lane.

side. When you are passing another vehicle, the warning is emitted only if the difference in speed is less than 7 mph (12 km/h). The yellow indicator lamp goes out if the reverse gear is engaged. In this event, Blind Spot Assist is no longer active. The brightness of the indicator/warning lamps is adjusted automatically according to the ambient light. G WARNING Blind Spot Assist is not active at speeds under approximately 20 mph (30 km/h). The indicator lamps in the exterior mirrors are yellow. Vehicles in the monitoring range are then not indicated. Always pay attention to traffic conditions and your surroundings. Otherwise, you may fail to recognize dangers in time, cause an accident and injure yourself and others.

Collision warning If a vehicle is detected in the monitoring range of Blind Spot Assist and you switch on the turn signal, a double warning tone sounds. Red warning lamp : flashes. If the turn signal remains on, detected vehicles are indicated by the flashing of red warning lamp :. There are no further warning tones.

Switching on Blind Spot Assist X Make sure that the radar sensor system

(Y page 227) and Blind Spot Assist (Y page 228) are activated in the on-board computer.

X Turn the SmartKey to position 2 in the

ignition lock. Warning lamps : light up red in the exterior mirrors for approximately 1.5
seconds and then turn yellow.

Trailer towing When you attach a trailer, make sure you have correctly established the electrical connection. This can be accomplished by

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203

checking the trailer lighting. In this event, Blind Spot Assist is deactivated. The indicator lamp in the exterior mirrors lights up yellow and the Blind Spot Assist Currently Unavailable See Operator's Manual message appears in the multifunction display. i You can deactivate the indicator lamps in

the exterior mirrors. To do so, switch off Blind Spot Assist when: Rthe SmartKey is in position 2 in the

ignition lock.

Rthe engine is not running. Rthe electrical connection to the trailer

has been established.

Off-road driving systems 4MATIC (permanent four-wheel drive) 4MATIC ensures that all four wheels are permanently driven. Together with ESP® and 4ETS, it improves the traction of your vehicle whenever a drive wheel spins due to insufficient grip. G WARNING If a drive wheel is spinning due to insufficient traction: RWhile driving off, apply as little throttle as

possible.

RWhile driving, ease up on the accelerator

pedal.

RAdapt your speed and driving style to the

prevailing road conditions.

Failure to observe these guidelines could cause the vehicle to skid. The 4MATIC cannot prevent accidents resulting from excessive speed.

! Never tow the vehicle with one axle

raised. This may damage the transfer case. Damage of this sort is not covered by the Mercedes-Benz Limited Warranty. All wheels must remain either on the ground

204 Off-road driving systems

or be fully raised. Observe the instructions for towing the vehicle with all wheels in full contact with the ground.

i In wintry driving conditions, the maximum

effect of 4MATIC can only be achieved if you use winter tires (M+S tires), with snow chains if necessary.

! When testing the parking brake, operate the vehicle only briefly (for a maximum of ten seconds) on a brake test dynamometer. When doing this, turn the key to position 0 or 1 in the ignition. Failure to do this can cause damage to the drive train or the brake system.

! Function or performance tests may only be performed on a 2-axle dynamometer. If you wish to operate the vehicle on such a dynamometer, please consult an authorized Mercedes-Benz Center beforehand. You could otherwise damage the drive train or the brake system.

For information about driving off-road, see (Y page 174).

DSR (Downhill Speed Regulation) Important safety notes DSR is an aid to assist you when driving downhill. It keeps the speed of travel at the speed selected on the on-board computer. The steeper the downhill gradient, the greater the DSR braking effect on the vehicle. When driving on flat stretches of road or on an uphill gradient, the DSR braking effect is minimal or non-existent. The set speed is set to 4 mph (6 km/h) at the factory; this can be adjusted using the on- board computer (Y page 228). G WARNING Downhill Speed Regulation (DSR) is a convenience system designed to assist the driver during vehicle operation. The system setting must be appropriate to the topographical and weather conditions

encountered, which can change quickly. The driver is responsible for the vehicle speed and for safe brake operation at all times. Depending on the programmed speed, actual vehicle speed and gradient, switching on DSR while driving can cause the vehicle to slow down rapidly, and you may hear a sound, caused by the activation of the vehicle's brake system through DSR. Sudden and unexpected deceleration can result in loss of vehicle control, causing an accident and/or serious personal injury to you and others. Do not switch on DSR in a situation where rapid deceleration could result in a loss of vehicle control.

DSR controls the set speed when it is active and the automatic transmission is in the D, R or N position. You can drive at a higher or a lower speed than that set on the on-board computer at any time by accelerating or braking. G WARNING If you depress the accelerator pedal with DSR activated, the vehicle can drive faster than the programmed set speed. You should therefore drive downhill with particular caution as it could lead to an accident and/or serious injury to you or others. Keep in mind that as soon as you remove your foot from the accelerator pedal with DSR switched on, DSR will start regulating the vehicle's speed including use of brakes if required. Depending on the programmed set speed, actual vehicle speed and gradient, DSR can cause the vehicle to slow down rapidly. Sudden and unexpected deceleration can result in loss of vehicle control, causing an accident and/or serious personal injury to you and others.

For information about driving off-road, see (Y page 174).

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Activating/deactivating DSR Activating DSR can only be activated if you are driving no faster than 20 mph (30 km/h).

Vehicle without the Off-Road Pro Engineering package

Deactivating X Press button :.

Indicator lamp ; goes out. The DSR symbol appears in the multifunction display with the Off message.

DSR is deactivated automatically if you are driving faster than 21 mph (Canada: 35 km/h). The DSR symbol appears in the multifunction display with the Off message. You also hear a warning tone.

Changing the set speed while the vehicle is in motion When DSR is activated, the control speed can be changed to a value between 3 mph and 10 mph (Canada: between 4 km/h and 18 km/h) during the journey.

Vehicle with the Off-Road Pro Engineering package X Press button :.

Indicator lamp ; lights up.

The DSR symbol and a message, such as the following, appear in the multifunction display:

If the speed that is being driven is too high, the DSR symbol and the Max. speed 20 mph (Canada: 30 km/h) message appears in the multifunction display.

X To increase or decrease in 1 mph

(Canada: 1 km/h) increments: press the cruise control lever to the point of resistance briefly upwards : for a higher control speed or briefly downwards ; for a lower control speed. The set value appears in the multifunction display.

X To increase or decrease in 5 mph

(Canada: 10 km/h) increments: push the cruise control lever beyond the point of resistance briefly upwards : for a higher control speed or briefly downwards ; for a lower control speed. The set value appears in the multifunction display.

206 Off-road driving systems

Off-road drive program i The off-road drive program is available only in vehicles without the Off-Road Pro engineering package.

The off-road drive program assists you in driving off-road. The engine’s performance characteristics and the gearshifting characteristics of the automatic transmission are adapted for this purpose. ABS, ESP® and 4 ETS programs especially adapted to off- road driving are also activated. Do not use the off-road drive program on roads that are covered in snow or icy or if you have installed snow chains on your vehicle. For information about driving off-road, see (Y page 174).

X To activate: press off-road button :.

Indicator lamp ; lights up. Off-road indicator = appears in the multifunction display.

X To activate: press off-road button :. Indicator lamp ; and off-road indicator = go out.

LOW RANGE off-road gear General notes The LOW RANGE off-road gear assists you in driving off-road and when fording. When LOW RANGE is engaged, the engine’s performance characteristics and the gearshifting characteristics of the automatic transmission are adapted for this purpose. ABS, ESP® and 4 ETS programs especially adapted to off- road driving are also activated. Information on "Off-road driving"; see (Y page 174). You will find information about driving safety systems in conjunction with LOW RANGE in the "Safety" section (Y page 67).

Shift ranges

HIGH RANGE Road position for all

normal driving situations

LOW RANGE Off-road position for driving off-road and fording The gear ratio between the engine and wheels is only approximately one third of that in the HIGH RANGE road position. The drive torque is correspondingly higher as a result. Do not use LOW RANGE: Ron slippery road

surfaces, e.g. in the case of slush

Ron snow or ice-covered

roads

Rif you have snow chains

on your vehicle

G WARNING Always wait until the procedure of shifting from HIGH RANGE to LOW RANGE – and from LOW RANGE to HIGH RANGE – has been entirely completed. During this procedure do

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not turn off the engine or shift the automatic transmission into another gear. If you do not wait until the shifting procedure has been entirely completed then it might not be correctly performed. The transfer case might be in neutral, thus interrupting the transfer of power between the engine and the drive axle. The vehicle is then freely movable, even if a gear has been selected, and could unintentionally be set into motion – particularly on up – or downhill grades. This could lead to an accident and cause injury to yourself and others. Please observe related messages appearing in the multifunction display.

From HIGH RANGE to LOW RANGE ! Only carry out the gear change process if:

Rthe engine is running Rthe transmission is in position N Ryou are not driving faster than

25 mph (40 km/h)

X Press LOW RANGE button :.

Indicator lamp ; flashes. LOW RANGE indicator = appears in the multifunction display.

When the gear change is complete, indicator lamp ; lights up.

While indicator lamp ; is flashing, you can cancel the gear change by pressing LOW RANGE button : again. From LOW RANGE to HIGH RANGE ! Only carry out the gear change process if:

Rthe engine is running Rthe transmission is in position N Ryou are not driving faster than 43 mph

(70 km/h)

X Press LOW RANGE button :.

Indicator lamp ; flashes. If the gear change process has taken place, indicator lamp ; and LOW RANGE indicator = in the multifunction display go out.

While indicator lamp ; is flashing, you can cancel the gear change by pressing LOW RANGE button : again. Messages in the multifunction display If a gear change process has not been successful, the following messages may be displayed in the multifunction display: Drive max. 25 mph (Canada: 40 km/h): You have driven faster than 25 mph (40 km/h). Indicator lamp ; also flashes. X Drive more slowly to carry out the gear change process. Briefly engage gear N: The transmission is in position D and you are now driving below 25 mph (40 km/h). X Shift the transmission to N to complete the gear change process. Shifting process canceled Reactivate: The shifting process has not been completed. X Maintain all gear change conditions and carry out the gear change process again. Stop vehicle Apply parking brake: A warning tone is also heard. The gear change

208 Off-road driving systems

process has not been completed. LOW RANGE is in the neutral position. There is no connection between the engine and the drive wheels. ! Do not drive any further, otherwise you

could damage the vehicle’s drive train. X Stop the vehicle. Take into account the

road and traffic conditions when doing this.

X Depress the parking brake. X Carry out the gear change process again. If the gear change process has been carried out, the Stop vehicle Apply parking brake message disappears.

Differential lock General notes i Differential locks are available only in

vehicles with the Off-Road Pro engineering package.

Your vehicle is equipped with the following: RA differential lock for the transfer box: this controls the balance between the front and rear axles.

RA differential lock for the rear axle: this

controls the balance between the wheels and the rear axle.

Differential locks improve the vehicle's traction. 4ETS (Y page 70) controls the balance between the wheels on the front axle. For information about driving off-road, see (Y page 174).

Information on differential and differential locks When the vehicle drives around a corner, the wheels on the outside of the bend must cover a greater distance and must therefore turn more rapidly than the wheels on the inside. The differential, a transmission in the drive train, compensates for these different rotational speeds, making cornering possible.

A differential has the disadvantage that the wheels with the least road grip are driven with the greatest force. An example: a wheel of a driven axle is on a snow-covered surface and therefore does not have any traction. The differential causes this wheel to be subjected to the strongest driving force, as the flow of force takes the path of least resistance. On the other hand, the opposite wheel on this axle, which is located on a firm surface and could therefore make traction possible, does not receive any driving force. 4ETS rectifies this disadvantage and provides good steerability by braking the spinning wheel automatically and therefore channeling more driving force to the wheel that is on a firm surface and that can therefore supply traction. ESP® and 4ETS are traction systems that are ideally suited for driving on roads and on gentle terrain. The LOW RANGE off-road gear also improves off-road capability. Difficult terrain conditions require further more extensive measures such as the locking of one or more differentials. Your vehicle is equipped with two differential locks: one (central) differential lock for the transfer case and one differential lock for the rear axle. Each differential lock can be activated with the selector wheel on the center console. When the (central) differential for the transfer case is locked, the speed of the front wheels is just as high as the speed of the rear wheels. If the differential for the rear axle is locked, both rear wheels turn at the same speed, regardless of their individual torques. Please note that activating the differential locks severely restricts the vehicle's steerability. For your own safety, the safety of others and to prevent damage to your vehicle, the differential locks must not be activated on paved roads. Please note that the function of the differential is absolutely necessary for driving on paved roads and that the differentials must not be locked on paved roads under any circumstances. The steerability of the vehicle would otherwise be

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lost and steering would no longer be possible. The differential locks must therefore only be activated off-road and only if activating the other driving systems (4ETS, ESP® and LOW Range off-road gear) is no longer sufficient.

Engaging the differential locks ! Pull away slowly when the differential

locks are activated. Function or performance tests may only be performed on a 2-axle dynamometer. If you wish to operate the vehicle on such a dynamometer, please consult an authorized Mercedes-Benz Center beforehand. You could otherwise damage the drive train or the brake system.

Automatic mode Use automatic mode ; for all driving situations, including driving off-road or when fording. In automatic mode, the differential locks are engaged and disengaged according to driving requirements. This guarantees sufficient traction for most driving situations with unrestricted vehicle steerability. X Start the engine.

The differential locks are in automatic mode. The indicator lamp in selector wheel : lights up above symbol for automatic mode ;.

Engaging manually G WARNING Never drive on a paved surface with the center and rear axle differential locks manually engaged. Ability to steer the vehicle is greatly reduced when the differential locks are manually engaged, increasing the risk of an accident. For safety reasons, the locks are automatically released at a vehicle speed above 31 mph (50 km/h). Nevertheless, you should only manually lock the differential if absolutely necessary because engaged locks will restrict the vehicle drivetrain while cornering and cause the vehicle to chatter. This could cause you to lose control of the vehicle and cause an accident.

! The differential locks must not be

activated when the vehicle is being towed or while the wheels are spinning.

Only engage the differential locks manually if traction in automatic mode is insufficient. The differential locks can be activated manually up to a speed of 19 mph (30 km/h). X Start the engine. X Turn selector wheel : to desired position

= or ?. The indicator lamp in selector wheel : lights up at the corresponding symbol. The engaged differential appears in the multifunction display:

A The differential lock for the transfer case

is locked.

If you have not previously selected the off- road menu (Y page 222) in the on-board

210 Trailer towing

computer, the message disappears after about five seconds. The differential locks are not controlled automatically. The steerability of the vehicle is restricted considerably. Drive carefully and accelerate gently for optimum traction. ! If the differential locks are activated manually, the wheels scuff on the road when cornering since the rotation difference between the wheels is no longer balanced out.

You can switch back to automatic mode at any time. For safety reasons, the differential locks are deactivated automatically at speeds over 31 mph (50 km/h). If you stop the vehicle and switch off the ignition for longer than ten seconds, the differential locks switch back to automatic mode. Message in the multifunction display Diff. lock system overheated. Wait briefly. The differential lock system has overheated and briefly disengaged. X Continue driving.

The differential locks cool off and are soon available once again.

Trailer towing Notes on towing a trailer Important safety notes G WARNING When towing a trailer, incorrect equipment and driving style could cause you to lose control of the vehicle. Towing incorrectly or not observing this Operator's Manual could lead to damage to the vehicle and/or serious injuries. Observe the following guidelines to ensure safe trailer towing.

Contact a Mercedes-Benz Center if you need further explanation of the information contained in this Operator's Manual.

General information ROnly install an approved trailer coupling on

your vehicle. Further information on availability and on installation is available from any authorized Mercedes-Benz Center.

RThe bumpers of your vehicle are not

suitable for installing detachable trailer couplings.

RDo not install hired trailer couplings or

other detachable trailer couplings on the bumpers of your vehicle.

RTo reduce the risk of damage to the ball

coupling, remove it from the ball coupling recess when not in use.

Coupling up a trailer G WARNING While you are coupling or decoupling a trailer, make sure nobody locks or unlocks the vehicle and/or opens or closes doors or the tailgate. The vehicle's level could change and you could endanger yourself and/or others as a result. Make sure that you do not operate the ADS button or the vehicle level control system when coupling/decoupling the trailer.

Observe the maximum permissible trailer dimensions (width and length). Most federal states and all Canadian provinces require by law: Rsafety chains between the towing vehicle and the trailer. The chains should be cross- wound under the trailer drawbar. They must be fastened to the vehicle's trailer coupling, not to the bumper or the axle.

Allow for enough play in the chains to facilitate turning tight corners.

power socket of your vehicle, e.g. a bicycle carrier.

Trailer towing 211

Ra separate brake system for certain types

of trailer.

Ra safety switch for braked trailers. Check the specific legal requirements applicable to your federal state. If the trailer detaches from the towing vehicle, the safety switch applies the trailer's brakes.

! Do not connect the trailer's brake system (if featured) to the hydraulic brake system of the towing vehicle, as the latter is equipped with an anti-lock brake system. Doing so will result in a loss of function of the brake systems of both the vehicle and the trailer.

i The vehicle's wiring harness features a

line to the brake indicator lamp.

X Make sure that the automatic transmission

is set to position P.

X Apply the vehicle's parking brake. X Start the engine. X Select highway level. X Vehicles with the adaptive damping system: set ADS to AUTO or COMF.

X Switch off the engine. X Close all doors and the tailgate. X Couple up the trailer. X Establish all electrical connections. i Vehicles with the AIRMATIC package: with a trailer attached, the vehicle will always remain at highway level. When coupling up a trailer, please observe the following: Rif highway level has not been set

manually, the vehicle will automatically sink to highway level as soon as it reaches a speed of 5 mph (8 km/h).

Rhigh-speed level is not available. These restrictions apply to all accessories powered through a connection to the trailer

Towing a trailer There are numerous legal requirements concerning the towing of a trailer, e.g. speed restrictions. Make sure that your vehicle/ trailer combination complies with the local requirements not only in your area of residence but also at any location to which you are traveling. The police and local authorities can provide reliable information. Please observe the following when towing a trailer: RTo acquaint yourself with driving with a trailer and with the resulting changes to handling, you should practice cornering, stopping and reversing in a traffic-free location.