2014 Mercedes-benz GLK Class Owners Manual

Transfer case This section is only valid for vehicles with 4- wheel drive (4MATIC). Power is always transmitted to both axles. ! Performance tests may only be carried out on a 2-axle dynamometer. The brake system or transfer case could otherwise be damaged. Contact a qualified specialist workshop for a performance test.

! To prevent ESP® from intervening, the

ignition must be switched off (SmartKey in position 0 or 1) if: Rthe parking brake is being tested on a

brake dynamometer.

Rthe vehicle is being towed with only one

axle raised (not permitted for vehicles with 4MATIC).

The brake system could otherwise be damaged.

! Vehicles with 4MATIC must not be towed with either the front or the rear axle raised, as doing so will damage the transmission.

Refueling Important safety notes G WARNING Fuel is highly flammable. If you handle fuel incorrectly, there is a risk of fire and explosion. You must avoid fire, open flames, creating sparks and smoking. Switch off the engine and, if applicable, the auxiliary heating before refueling. G WARNING Fuel is poisonous and hazardous to health. There is a risk of injury. You must make sure that fuel does not come into contact with your skin, eyes or clothing and that it is not swallowed. Do not inhale fuel vapors. Keep fuel away from children.

Refueling 159

If you or others come into contact with fuel, observe the following: RWash away fuel from skin immediately

using soap and water.

RIf fuel comes into contact with your eyes, immediately rinse them thoroughly with clean water. Seek medical assistance without delay.

RIf fuel is swallowed, seek medical

assistance without delay. Do not induce vomiting.

RImmediately change out of clothing which

has come into contact with fuel. G WARNING Electrostatic buildup can create sparks and ignite fuel vapors. There is a risk of fire and explosion. Always touch the vehicle body before opening the fuel filler flap or touching the fuel pump nozzle. Any existing electrostatic buildup is thereby discharged. G WARNING Vehicles with a diesel engine: If you mix diesel fuel with gasoline, the flash point is lower than that of pure diesel fuel. When the engine is running, exhaust system components could overheat without being noticed. There is a risk of fire. Never refuel with gasoline. Never mix gasoline with diesel fuel.

! Do not use gasoline to refuel vehicles with a diesel engine. Do not use diesel to refuel vehicles with a gasoline engine. Do not switch on the ignition if you accidentally refuel with the wrong fuel. Otherwise, the fuel will enter the fuel system. Even small amounts of the wrong fuel could result in damage to the fuel system and the engine. The repair costs are high. Notify a qualified specialist workshop and have the fuel tank and fuel lines drained completely.

! Overfilling the fuel tank could damage the

fuel system.

! Take care not to spill any fuel on painted surfaces. You could otherwise damage the paintwork.

! Use a filter when refueling from a fuel can. Otherwise, the fuel lines and/or injection system could be blocked by particles from the fuel can.

Do not get into the vehicle again during the refueling process. Otherwise, electrostatic charge could build up again. If you overfill the fuel tank, fuel could spray out when the fuel pump nozzle is removed. For further information on fuel and fuel quality (Y page 367).

Refueling Opening/closing the fuel filler flap

: To open the fuel filler flap ; To insert the fuel filler cap = Tire pressure table ? Fuel type to be used The fuel filler flap is unlocked or locked automatically when you open or close the vehicle with the SmartKey or with KEYLESS- GO. The position of the fuel filler cap is displayed 8 in the instrument cluster. The arrow next to the filling pump indicates the side of the vehicle.

160 Refueling

To open X Switch the engine off. X Remove the SmartKey from the ignition

lock.

X KEYLESS-GO: open the driver’s door.

This corresponds to key position 0: "key removed". The driver’s door can be closed again.

X Press the fuel filler flap in the direction of

arrow :. The fuel filler flap opens slightly.

X Open the fuel filler flap fully. X Turn the fuel filler flap counter-clockwise

and remove it.

X Insert the fuel filler cap into the holder bracket on the inside of filler flap ;.

X Completely insert the filler neck of the fuel

pump nozzle into the tank, hook in place and refuel.

X Only fill the tank until the pump nozzle

switches off.

i Do not add any more fuel after the pump

stops filling for the first time. Otherwise, fuel may leak out.

To close X Replace the cap on the filler neck and turn

clockwise until it engages audibly.

X Close the fuel filler flap. i Close the fuel filler flap before locking the

vehicle.

i If you are driving with the fuel filler cap open, the 8 reserve fuel warning lamp flashes. A message appears in the multifunction display (Y page 249). In addition, the ; Check Engine warning lamp may light up (Y page 268). For further information on warning and indicator lamps in the instrument cluster, see (Y page 268).

Problems with fuel and the fuel tank Problem Fuel is leaking from the vehicle.

The engine does not start.

The fuel filler flap cannot be opened.

Refueling 161

Possible causes/consequences and M Solutions The fuel line or the fuel tank is faulty. G WARNING Risk of explosion or fire. X Turn the SmartKey to position 0 in the ignition lock and remove

it immediately (Y page 145).

X Do not restart the engine under any circumstances. X Consult a qualified specialist workshop. The fuel tank of a vehicle with a diesel engine has been run completely dry. X Refuel the vehicle with at least 5.3 US qt (5 liters) of diesel. X Turn the ignition on for approximately ten seconds

X Start the engine continuously for up to ten seconds until it runs

(Y page 145).

smoothly.

(Y page 145).

it runs smoothly.

If the engine does not start: X Turn the ignition on again for approximately ten seconds

X Start the engine again continuously for up to ten seconds until

If the engine does not start after three attempts: X Consult a qualified specialist workshop. The fuel filler flap is not unlocked. or The SmartKey battery is discharged. X Unlock the vehicle (Y page 76). or X Unlock the vehicle using the mechanical key (Y page 78). The fuel filler flap is unlocked, but the opening mechanism is jammed. X Consult a qualified specialist workshop.

162 Refueling

DEF (BlueTEC vehicles only) Important notes on use To function properly, BlueTEC exhaust gas aftertreatment must be operated with the reducing agent DEF. Adding DEF is one of the tasks performed during maintenance. Under normal operating conditions, a tank of DEF lasts until the next service due date. When the supply of DEF is almost used up, the Check Additive See Operator's Manual message is shown in the multifunction display. When the DEF supply drops to a minimum, the Remaining Starts: 16 message is shown in the multifunction display. If the Remaining Starts: 16 message appears in the multifunction display, you can start the engine another 16 times. If DEF is not refilled, you will subsequently be unable to start the engine. Refill the DEF tank with around 1 gal (3.8 l) of DEF or have the DEF tank refilled at a qualified specialist workshop. Use the special DEF refill bottle when adding DEF between maintenance intervals. Contact a qualified specialist workshop with any questions or, if necessary, contact Roadside Assistance (Y page 24). If the outside temperature is below 12 ‡ (Ò11 †) it may be difficult to top up. If DEF is frozen and there is an active warning indicator, it may not be possible to add DEF. Park the vehicle in a warmer place, e.g. in a garage, until DEF has become fluid again. It will then be possible to add DEF again. Alternatively, have the DEF tank refilled at a qualified specialist workshop. Further information about BlueTEC exhaust gas aftertreatment and DEF is available at any authorized Mercedes-Benz Center.

Important safety notes on the refilling procedure DEF is a water-soluble fluid for the exhaust gas aftertreatment of diesel engines. It is: Rnot poisonous Rcolorless and odorless Rnot flammable When you open the DEF container, small amounts of ammonia vapor may be released. Ammonia vapors have a pungent odor and are particularly irritating to the skin, to mucous membranes and to the eyes. You may experience a burning sensation in your eyes, nose and throat. Coughing and watering of the eyes are possible. Do not inhale ammonia vapors. Fill the DEF tank only in well-ventilated areas. DEF must not come into contact with your skin, eyes or clothing and must not be swallowed. Keep DEF away from children. If you or other persons come into contact with DEF, observe the following: RRinse DEF from your skin immediately with

soap and water.

RIf DEF comes into contact with your eyes,

immediately rinse them thoroughly with clean water. Seek medical assistance without delay.

RIf DEF has been swallowed, rinse your mouth out immediately. Drink plenty of water. Seek medical assistance without delay.

RChange out of clothing contaminated with

DEF immediately.

! Only use DEF in accordance with

ISO 22241. Do not mix any additives with DEF, and do not dilute DEF with water. This may destroy the BlueTEC exhaust gas aftertreatment system.

! Rinse surfaces that have come into

contact with DEF immediately with water or remove DEF using a damp cloth and cold water. If the DEF has already crystallized, use a sponge and cold water to clean it. DEF

residues crystallize after time and contaminate the affected surfaces.

! DEF is not a fuel additive and must not be added to the fuel tank. If DEF is added to the fuel tank, this can lead to engine damage.

! Only screw on the DEF refill bottle hand-

tight. It could otherwise be damaged.

The DEF filler neck is under the cargo compartment floor. X Switch the ignition off. X Open the tailgate. X Lift up the cargo compartment floor

(Y page 314).

X Turn DEF cap : counter-clockwise and

remove it.

X Turn DEF filler cap ; counter-clockwise

and open it. Filler cap ; is secured with a plastic strip.

Refueling 163

X Unscrew the protective cap from DEF refill

bottle =.

X Set DEF refill bottle = as shown on the

filler neck and screw it on hand-tight. X Press DEF refill bottle = downward.

The DEF tank is filled. This may take up to one minute.

i To top up between service intervals, fill

the DEF tank with approximately 1 gal (3.8 l) of DEF. 1 gal (3.8 l) DEF is equivalent to approximately 2 DEF refill bottles. Then have the DEF supply checked at a qualified specialist workshop and completely refilled if necessary.

X Release DEF refill bottle =.

When DEF refill bottle = is no longer pressed down, filling stops. DEF refill bottle = can be removed when it has been only partially emptied.

X Turn DEF refill bottle = counter-clockwise

and remove it.

X Place DEF filler cap ; on the filler neck and

turn it clockwise.

164 Parking

X Replace DEF cover : as shown and turn it

clockwise as far as it will go.

X Fold the cargo compartment floor down. X Close the tailgate. X Drive faster than 10 mph (16 km/h). The Check Additive See Operator's Manual message goes out after approximately one minute. i If the Check Additive See Operator's Manual message remains shown in the multifunction display, add an additional bottle of DEF.

For further information on DEF, see (Y page 370).

Parking Important safety notes G WARNING Flammable material such as leaves, grass or twigs may ignite if they come into contact with hot parts of the exhaust system or exhaust gas flow. There is a risk of fire. Park the vehicle so that no flammable materials come into contact with parts of the vehicle which are hot. Take particular care not to park on dry grassland or harvested grain fields. G WARNING If you switch off the ignition while driving, safety-relevant functions are only available with limitations, or not at all. This could affect, for example, the power steering and the brake boosting effect. You will require considerably more effort to steer and brake. There is a risk of an accident. Do not switch off the ignition while driving.

G WARNING If you leave children unsupervised in the vehicle, they could set it in motion by, for example: Rrelease the parking brake. Rshift the automatic transmission out of the

parking position P.

Rstart the engine. In addition, they may operate vehicle equipment and become trapped. There is a risk of an accident and injury. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle.

! Always secure the vehicle correctly

against rolling away. Otherwise, the vehicle or its drivetrain could be damaged.

To ensure that the vehicle is secured against rolling away unintentionally: Rthe parking brake must be applied. Rthe transmission must be in position P and the SmartKey must be removed from the ignition lock.

Ron uphill or downhill gradients, the front wheels must be turned towards the curb.

Switching off the engine Important safety notes G WARNING The automatic transmission switches to neutral position N when you switch off the engine. The vehicle may roll away. There is a risk of an accident. After switching off the engine, always switch to parking position P. Prevent the parked vehicle from rolling away by applying the parking brake.

Vehicles with automatic transmission X Apply the parking brake firmly. X Shift the transmission to position P. Using the SmartKey X Turn the SmartKey to position 0 in the

ignition lock and remove it. The immobilizer is activated.

i The SmartKey can only be removed if the

transmission is in position P.

Using KEYLESS-GO X Press the Start/Stop button (Y page 145).

The engine stops and all the indicator lamps in the instrument cluster go out. i When the driver's door is closed, this

corresponds to key position 1. When the driver's door is open, this corresponds to key position 0: "key removed".

i In the event of an emergency, the engine

can be turned off while the vehicle is in motion by pressing and holding the Start/ Stop button for three seconds.

Parking brake G WARNING If you must brake the vehicle with the parking brake, the braking distance is considerably longer and the wheels could lock. There is an increased danger of skidding and accidents. Only use the parking brake to brake the vehicle when the service brake is faulty. Do not apply the parking brake too firmly. If the wheels lock, release the parking brake until the wheels begin turning again.

Parking 165

G WARNING If you leave children unsupervised in the vehicle, they could set it in motion by, for example: Rreleasing the parking brake Rshifting the automatic transmission out of

the parking position P

Rstarting the engine. They could also operate the vehicle's equipment. There is a risk of an accident and injury. When leaving the vehicle, always take the SmartKey with you and lock the vehicle. Never leave children unsupervised in the vehicle.

If you brake the vehicle with the parking brake, the brake lamps will not light up.

X To apply: depress parking brake ; firmly. When the engine is running, the $ (USA only) or J (Canada only) indicator lamp lights up in the instrument cluster.

X To release: depress the brake pedal and

keep it depressed.

X Pull release handle :.

When the ignition is switched on or the engine is running, the $ (USA only) or J (Canada only) indicator lamp goes out in the instrument cluster.

Parking the vehicle for a long period If you leave the vehicle parked for longer than four weeks, the battery may be damaged by exhaustive discharging.

166 Driving tips

X Connecting a trickle charger. i You can obtain information about trickle

chargers from a qualified specialist workshop.

If you leave the vehicle parked for longer than six weeks, the vehicle may suffer damage as a result of lack of use. X Visit a qualified specialist workshop and

seek advice.

Driving tips General driving tips Important safety notes G WARNING If you switch off the ignition while driving, safety-relevant functions are only available with limitations, or not at all. This could affect, for example, the power steering and the brake boosting effect. You will require considerably more effort to steer and brake. There is a risk of an accident. Do not switch off the ignition while driving. G WARNING If you operate mobile communication equipment while driving, you will be distracted from traffic conditions. You could also lose control of the vehicle. There is a risk of an accident. Only operate this equipment when the vehicle is stationary.

Observe the legal requirements for the country in which you are driving. Some jurisdictions prohibit the driver from using a mobile phone while driving a vehicle. If you make a call while driving, always use hands-free mode. Only operate the telephone when the traffic situation permits. If you are unsure, pull over to a safe location and stop before operating the telephone. Bear in mind that at a speed of only 30 mph (approximately 50 km/h), the vehicle covers

a distance of 44 ft (approximately 14 m) per second.

Drive sensibly – save fuel Observe the following tips to save fuel: X The tires should always be inflated to the

recommended tire pressure. X Remove unnecessary loads. X Remove roof racks when they are not

needed.

X Warm up the engine at low engine speeds. X Avoid frequent acceleration or braking. X Have all maintenance work carried out as

indicated by the service intervals in the Maintenance Booklet or by the service interval display.

Fuel consumption also increases when driving in cold weather, in stop-start traffic and in hilly terrain.

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

Emission control G WARNING Combustion engines emit poisonous exhaust gases such as carbon monoxide. Inhaling these exhaust gases leads to poisoning. There is a risk of fatal injury. Therefore never leave the engine running in enclosed spaces without sufficient ventilation.

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167

Certain engine systems are designed to keep the level of poisonous components in exhaust fumes within legal limits. These systems only work at peak efficiency if they are serviced exactly in accordance with the manufacturer's specifications. For this reason, all work on the engine must be carried out by qualified and authorized Mercedes- Benz technicians. The engine settings must not be changed under any circumstances. Furthermore, all specific service work must be carried out at regular intervals and in accordance with the Mercedes-Benz service requirements. Details can be found in the Maintenance Booklet.

ECO display The ECO display gives you information on how economical your driving style is. The ECO display assists you in achieving the optimum driving style in terms of consumption, taking the actual and selected conditions into consideration. Your driving style can significantly influence the vehicle's consumption.

Example: ECO display The ECO display consists of three bars: RAcceleration RConstant RCoasting The percent value is the average value of the three bars. The three bars and the mean value begin at the value of 50%. A higher percentage indicates a more economical driving style. The ECO display does not indicate the actual fuel consumption and a fixed percentage

count in the ECO display does not indicate a fixed consumption figure. Apart from driving style, consumption is dependent on many factors such as, e.g.: Rload Rtire pressure Rcold start Rchoice of route Relectrical consumers switched on These factors are not taken into consideration by the ECO display. The evaluation of your driving style is carried out using the following three categories: RAcceleration (evaluation of all acceleration processes): - The bar fills up: moderate acceleration,

especially at higher speeds

- The bar empties: sporty acceleration RConstant (assessment of driving behavior at all times): - The bar fills up: constant speed and

avoidance of unnecessary acceleration and deceleration

- The bar empties: fluctuations in speed RCoasting (assessment of all deceleration processes): - The bar fills up: anticipatory driving,

keeping your distance and early release of the accelerator. The vehicle can coast without use of the brakes.

- The bar empties: frequent braking

i An economical driving style specially

requires driving at moderate engine speeds. To achieve a higher value in the categories Acceleration and Constant: Robserve the gearshift recommendations. Rdrive in drive program E. i On long journeys at a constant speed, e.g. on the highway, only the bar for Constant will change.

168 Driving tips

i The ECO display summaries the driving

characteristics from the start of the journey to its completion. For this reason, the bars change dynamically at the beginning of the journey. On longer journeys, there are fewer changes. For more dynamic changes, carry out a manual reset.

Further information on the ECO display (Y page 224).

Braking Important safety notes G WARNING If you shift down on a slippery road surface in an attempt to increase the engine's braking effect, the drive wheels could lose their grip. There is an increased danger of skidding and accidents. Do not shift down for additional engine braking on a slippery road surface.

Downhill gradients ! On long and steep gradients, you must reduce the load on the brakes by shifting early to a lower gear. This allows you to take advantage of the engine braking effect and helps avoid overheating and excessive wear of the brakes. When you take advantage of the engine braking effect, a drive wheel may not turn for some time, e.g. on a slippery road surface. This could cause damage to the drive train. This type of damage is not covered by the Mercedes-Benz warranty.

Heavy and light loads G WARNING If you rest your foot on the brake pedal while driving, the braking system can overheat. This increases the stopping distance and can even cause the braking system to fail. There is a risk of an accident.

Never use the brake pedal as a footrest. Never depress the brake pedal and the accelerator pedal at the same time.

! Depressing the brake pedal constantly

results in excessive and premature wear to the brake pads.

If the brakes have been subjected to a heavy load, do not stop the vehicle immediately. Drive on for a short while. This allows the airflow to cool the brakes more quickly.

Wet roads If you have driven for a long time in heavy rain without braking, there may be a delayed reaction from the brakes when braking for the first time. This may also occur after the vehicle has been washed. You have to depress the brake pedal more firmly. Maintain a greater distance from the vehicle in front. After driving on a wet road or having the vehicle washed, brake firmly while paying attention to the traffic conditions. This will warm up the brake discs, thereby drying them more quickly and protecting them against corrosion.

Limited braking performance on salt- treated roads If you drive on salted roads, a layer of salt residue may form on the brake discs and brake pads. This can result in a significantly longer braking distance. RBrake occasionally to remove any possible

salt residue. Make sure that you do not endanger other road users when doing so. RCarefully depress the brake pedal and the

beginning and end of a journey.

RMaintain a greater distance to the vehicle

ahead.

Servicing the brakes ! If the red brake warning lamp lights up in

the instrument cluster and you hear a warning tone while the engine is running, the brake fluid level may be too low. Observe additional warning messages in the multifunction display. The brake fluid level may be too low due to brake pad wear or leaking brake lines. Have the brake system checked immediately. This work should be carried out at a qualified specialist workshop. All checks and maintenance work on the brake system must be carried out at a qualified specialist workshop. Consult a qualified specialist workshop to arrange this. Have brake pads installed and brake fluid replaced at a qualified specialist workshop. ! Vehicles with 4MATIC: function or

performance tests may only be carried out on a 2-axle dynamometer. If you are planning to have the vehicle tested on such a dynamometer, contact an authorized Mercedes-Benz Center to obtain further information first. Otherwise, you could damage the drive train or the brake system.

! As the ESP® system operates

automatically, the engine and the ignition must be switched off (SmartKey in position 0 or 1 in the ignition lock) when: Rtesting the parking brake on a brake

dynamometer.

Ryou intend to have the vehicle towed with

the front or rear axle raised (not permitted for vehicles with 4MATIC).

Braking maneuvers triggered automatically by ESP® may seriously damage the brake system.

If the brake system has only been subject to moderate loads, you should test the functionality of your brakes at regular intervals. To do so, press firmly on the brake pedal when driving at a high speed. This improves the grip of the brake pads.

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169

You can find a description of Brake Assist (BAS) on (Y page 68). Mercedes-Benz recommends that you only have brake pads/linings installed on your vehicle which have been approved for Mercedes-Benz vehicles or which correspond to an equivalent quality standard. Brake pads/linings which have not been approved for Mercedes-Benz vehicles or which are not of an equivalent quality could affect your vehicle's operating safety. Mercedes-Benz recommends that you only use brake fluid that has been specially approved for your vehicle by Mercedes-Benz, or which corresponds to an equivalent quality standard. Brake fluid which has not been approved for Mercedes-Benz vehicles or which is not of an equivalent quality could affect your vehicle's operating safety.

Parking brake G WARNING If you must brake the vehicle with the parking brake, the braking distance is considerably longer and the wheels could lock. There is an increased danger of skidding and accidents. Only use the parking brake to brake the vehicle when the service brake is faulty. Do not apply the parking brake too firmly. If the wheels lock, release the parking brake until the wheels begin turning again.

If you brake the vehicle with the parking brake, the brake lamps will not light up. If you drive on wet roads or dirt-covered surfaces, road salt and/or dirt could get into the parking brake. In order to prevent corrosion and a reduction in the braking power of the parking brake, observe the following: Rgently depress the parking brake from time

to time before beginning the journey.

Rdrive for approximately 110 yds (100 m) at a maximum speed of 12 mph (20 km/h).

170 Driving tips

Driving on wet roads Hydroplaning If water has accumulated to a certain depth on the road surface, there is a danger of hydroplaning occurring, even if: Ryou drive at low speeds. Rthe tires have adequate tread depth. For this reason, in the event of heavy rain or in conditions in which hydroplaning may occur, you must drive in the following manner: Rlower your speed. Ravoid ruts. Rbrake carefully.

Driving on flooded roads ! Do not drive through flooded areas.

Check the depth of any water before driving through it. Drive slowly through standing water. Otherwise, water may enter the vehicle interior or the engine compartment. This can damage the electronic components in the engine or the automatic transmission. Water can also be drawn in by the engine's air suction nozzles and this can cause engine damage.

Prevent water from entering the vehicle interior or the engine compartment. If you must drive through standing water, bear in mind that: Rthe maximum permissible fording depth in

still water is 12 in (30 cm)

Ryou should drive no faster than at walking

pace

Off-road fording ! Under no circumstances should you

accelerate before entering the water. The bow wave could cause water to enter and damage the engine and other assemblies.

! Do not open any of the vehicle's doors while fording. Otherwise, water could get

into the vehicle interior and damage the vehicle's electronics and interior equipment.

REstablish how deep the water is and the

characteristics of the body of water before fording.

RShift to a lower gear using the left-hand

steering wheel paddle shifter.

RAvoid high engine speeds. REnter and exit the water at a flat place and

at a steady walking pace.

RDrive slowly and at an even speed through

the water.

RDo not stop. RWater offers a high degree of resistance,

and the ground is slippery and in some cases unstable. Therefore, it is difficult and dangerous to pull away in the water.

REnsure that a bow wave does not form as

you drive.

RClean any mud from the tire tread after

fording.

RApply the brakes to dry them after fording. Always observe the fording depth values (Y page 375).

Winter driving Important safety notes G WARNING If you shift down on a slippery road surface in an attempt to increase the engine's braking effect, the drive wheels could lose their grip. There is an increased danger of skidding and accidents. Do not shift down for additional engine braking on a slippery road surface. G DANGER If the exhaust pipe is blocked or adequate ventilation is not possible, poisonous gases such as carbon monoxide (CO) may enter the vehicle. This is the case, e.g. if the vehicle

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171

becomes trapped in snow. There is a risk of fatal injury. If you leave the engine or the auxiliary heating running, make sure the exhaust pipe and area around the vehicle are clear of snow. To ensure an adequate supply of fresh air, open a window on the side of the vehicle that is not facing into the wind.

Have your vehicle winterproofed at a qualified specialist workshop at the onset of winter. Observe the notes in the "Winter operation" section (Y page 332).

Driving with summer tires Observe the notes in the "Winter operation" section (Y page 332).

Slippery road surfaces G WARNING If you shift down on a slippery road surface in an attempt to increase the engine's braking effect, the drive wheels could lose their grip. There is an increased danger of skidding and accidents. Do not shift down for additional engine braking on a slippery road surface.

Drive particularly carefully on slippery road surfaces. Avoid sudden acceleration, steering and braking maneuvers. Do not use the cruise control or DISTRONIC PLUS. If the vehicle threatens to skid or cannot be stopped when moving at low speed: X Shift the transmission to position N. i For more information on driving with

snow chains, see (Y page 333).

The outside temperature indicator is not designed to serve as an ice-warning device and is therefore unsuitable for that purpose. Changes in the outside temperature are displayed after a short delay. Indicated temperatures just above the freezing point do not guarantee that the road

surface is free of ice. The road may still be icy, especially in wooded areas or on bridges. The vehicle could skid if you fail to adapt your driving style. Always adapt your driving style and drive at a speed to suit the prevailing weather conditions. You should pay special attention to road conditions when temperatures are around freezing point.

Off-road driving Important safety notes G WARNING If you drive on a steep incline at an angle or turn when driving on an incline, the vehicle could slip sideways, tip and rollover. There is a risk of an accident. Always drive on a steep incline in the line of fall (straight up or down) and do not turn the vehicle.

When driving off-road, sand, mud and water, possibly mixed with oil, for example, could get into the brakes. This could result in a reduced braking effect or in total brake failure and also in increased wear and tear. The braking characteristics change depending on the material ingressing the brakes. Clean the brakes after driving off-road. If you detect a reduced braking effect or grinding noises, have the brake system checked in a qualified specialist workshop as soon as possible. Adapt your driving style to the different braking characteristics. Driving off-road increases the likelihood of damage to the vehicle, which, in turn, can lead to failure of the mechanical assembly or systems. Adapt your driving style to suit the terrain conditions. Drive carefully. Have damage to the vehicle rectified immediately at a qualified specialist workshop. Do not switch to transmission position N when driving off-road. If you try to brake the vehicle using the service brake, you could lose control of the vehicle. If the gradient is

172 Driving tips

too steep for your vehicle, drive back down in reverse gear.

General notes H Environmental note Protection of the environment is of primary importance. Treat nature with respect. Observe all prohibiting signs.

Read this section carefully before driving your vehicle off-road. Practice by driving over more gentle off-road terrain first. Familiarize yourself with the characteristics of your vehicle and the gear shift operation before driving through difficult terrain.

Checklist before driving off-road ! If the engine oil warning lamp lights up

while the vehicle is in motion, stop the vehicle in a safe place as soon as possible. Check the engine oil level. The engine oil warning lamp warning must not be ignored. Continuing the journey while the symbol is displayed could lead to engine damage.

Checklist after driving off-road Driving over rough terrain places greater demands on your vehicle than driving on normal roads. After driving off-road, check the vehicle. This allows you to detect damage promptly and reduce the risk of an accident to yourself and other road users.

Driving on sand Observe the following rules when driving on sand: Ruse the left-hand steering wheel paddle

shifter to shift to a lower gear appropriate to the terrain.

Rdrive quickly to overcome the rolling

resistance. Otherwise the vehicle's wheels could become stuck in loose ground. Rdrive in the tracks of other vehicles if

possible. Make sure that:

the tire ruts are not too deep. the sand is sufficiently firm. the ground clearance of the vehicle is sufficient.

Tire ruts and gravel roads Observe the following rules when driving along ruts in off-road terrain or on roads with loose gravel: ! Check that the ruts are not too deep and that your vehicle has sufficient clearance. Otherwise, your vehicle could be damaged or bottom out and get stuck.

Driving over obstacles ! Obstacles could damage the floor of the vehicle or components of the chassis. Ask passengers for guidance when driving over large obstacles. The passenger should always keep a safe distance from the vehicle when doing so in order to avoid injury as a result of unexpected vehicle movements. After driving off-road or over obstacles, check the vehicle for possible damage, especially to the underbody and the components of the chassis.

Observe the following rules when driving over tree stumps, large stones and other obstacles: Ravoid high engine speeds. Rshift to a lower gear using the left-hand

steering wheel paddle shifter.

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173

Rdrive very slowly. Rtry to drive straight over the center of obstacles: front wheel first, then rear wheel.

Traveling uphill Approach/departure angle G WARNING If you drive on a steep incline at an angle or turn when driving on an incline, the vehicle could slip sideways, tip and rollover. There is a risk of an accident. Always drive on a steep incline in the line of fall (straight up or down) and do not turn the vehicle.

RObserve the rules on off-road driving. RDo not drive at an angle on slopes, inclines or gradients, but instead follow the direct line of fall.

RDrive slowly. RAvoid high engine speeds. Drive at

appropriate engine speeds (maximum 3,000 rpm).

RShift to a lower gear using the left-hand

paddle shifter before tackling steep downhill gradients.

RWhen driving down an incline, make use of

the engine's braking effect. Observe the engine speed; do not overrev the engine. RCheck the brakes after prolonged off-road

driving.

Maximum gradient-climbing capability Always observe the maximum gradient climbing ability values (Y page 376).

Hilltops When driving up an uphill gradient, slightly reduce pressure on the accelerator immediately before reaching the brow of the hill. Make use of the vehicle's own impetus to travel over the brow. This style of driving prevents: Rthe vehicle from lifting off the ground on the

brow of a hill

Rthe vehicle from traveling too quickly down

the other side

Driving downhill RDrive slowly. RDo not drive at an angle down steep

inclines. Steer into the line of fall and drive with the front wheels aligned straight. Otherwise, the vehicle could slip sideways, tip and rollover.

RShift to a lower gear using the left-hand

paddle shifter before tackling steep downhill gradients.

RActivate DSR. If this is not sufficient, brake gently. When doing so, make sure that the vehicle is facing in the direction of the line of fall.

RCheck that the brakes are working normally

after a long downhill stretch.

i Hill start assist will aid you when pulling away on a hill. For further information about hill start assist, see (Y page 148).

Do not switch to transmission position N when driving off-road. If you try to brake the vehicle using the service brake, you could lose control of the vehicle. If the gradient is too steep for your vehicle, drive back down in reverse gear. Always observe the approach/departure angle values (Y page 376).

Driving systems Cruise control Important safety notes Cruise control maintains a constant road speed for you. It brakes automatically in order to avoid exceeding the set speed. You must select a low gear in good time on long and steep downhill gradients, especially if the vehicle is laden or towing a trailer. By doing

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so, you will make use of the braking effect of the engine. This relieves the load on the brake system and prevents the brakes from overheating and wearing too quickly. Use cruise control only if road and traffic conditions make it appropriate to maintain a steady speed for a prolonged period. You can store any road speed above 20 mph (30 km/h). If you fail to adapt your driving style, cruise control can neither reduce the risk of an accident nor override the laws of physics. Cruise control cannot take into account the road, traffic and weather conditions. Cruise control is only an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in your lane. Do not use cruise control: Rin road and traffic conditions which do not allow you to maintain a constant speed e.g. in heavy traffic or on winding roads Ron slippery road surfaces. Braking or

accelerating could cause the drive wheels to lose traction and the vehicle could then skid

Rwhen there is poor visibility, e.g. due to fog,

heavy rain or snow

If there is a change of drivers, advise the new driver of the speed stored. i Cruise control should not be activated

when driving off-road.

Cruise control lever

: To activate or increase speed ; To activate or reduce speed = To deactivate cruise control ? To activate at the current speed/last

stored speed

When you activate cruise control, the stored speed is shown in the multifunction display for five seconds. In the multifunction display, the segments between the stored speed and the maximum speed light up.

Storing and maintaining the current speed You can store the current speed if you are driving faster than 20 mph (30 km/h). X Accelerate the vehicle to the desired

speed.

X Briefly press the cruise control lever

up : or down ;.

X Remove your foot from the accelerator

pedal. Cruise control is activated. The vehicle automatically maintains the stored speed. i Cruise control may be unable to maintain the stored speed on uphill gradients. The stored speed is resumed when the gradient evens out. Cruise control maintains the stored speed on downhill gradients by automatically applying the brakes.

Storing the current speed or calling up the last stored speed G WARNING If you call up the stored speed and it differs from the current speed, the vehicle accelerates or decelerates. If you do not know the stored speed, the vehicle could accelerate or brake unexpectedly. There is a risk of an accident. Pay attention to the road and traffic conditions before calling up the stored speed. If you do not know the stored speed, store the desired speed again.

X Briefly pull the cruise control lever towards

you ?.

X Remove your foot from the accelerator

pedal. The first time cruise control is activated, it stores the current speed or regulates the speed of the vehicle to the previously stored speed.

Setting a speed Keep in mind that it may take a brief moment until the vehicle has accelerated or braked to the speed set. X Press the cruise control lever up : for a higher speed or down ; for a lower speed.

X To adjust the set speed in 1 mph

increments (1 km/h increments): briefly press the cruise control lever up : or down ; to the pressure point. Every time the cruise control lever is pressed up : or down ; the last speed stored is increased or reduced.

X To adjust the set speed in 5 mph

increments (10 km/h increments): briefly press the cruise control lever up : or down ; beyond the pressure point. Every time the cruise control lever is pressed up : or down ; the last speed stored is increased or reduced.

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i Cruise control is not deactivated if you

depress the accelerator pedal. For example, if you accelerate briefly to overtake, cruise control adjusts the vehicle's speed to the last speed stored after you have finished overtaking.

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

forwards =.

or X Brake. Cruise control is automatically deactivated if: Ryou depress the parking brake. Ryou are driving at less than 20 mph

(30 km/h).

RESP® intervenes or you deactivate ESP®. Ryou shift the transmission to position N

while driving. If cruise control is deactivated, you will hear a warning tone. You will see the Cruise Control Off message in the multifunction display for approximately five seconds. i When you switch off the engine, the last

speed stored is cleared.

DISTRONIC PLUS Important safety notes DISTRONIC PLUS regulates the speed and automatically helps you maintain the distance to the vehicle detected in front. DISTRONIC PLUS brakes automatically so that the set speed is not exceeded. You must select a low gear in good time on long and steep downhill gradients, especially if the vehicle is laden or towing a trailer. By doing so, you will make use of the braking effect of the engine. This relieves the load on the brake system and prevents the brakes from overheating and wearing too quickly.

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If DISTRONIC PLUS detects a slower-moving vehicle in front, your vehicle is braked in order to maintain the preset distance to the vehicle in front. G WARNING DISTRONIC PLUS does not react to: Rpeople or animals Rstationary obstacles on the road, e.g.

stopped or parked vehicles

Roncoming and crossing traffic As a result, DISTRONIC PLUS may neither give warnings nor intervene in such situations. There is a risk of an accident. Always pay careful attention to the traffic situation and be ready to brake. G WARNING DISTRONIC PLUS cannot always clearly identify other road users and complex traffic situations. In such cases, DISTRONIC PLUS may: Rgive an unnecessary warning and then

brake the vehicle

Rneither give a warning nor intervene Raccelerate unexpectedly There is a risk of an accident. Continue to drive carefully and be ready to brake, in particular when warned to do so by DISTRONIC PLUS. G WARNING DISTRONIC PLUS brakes your vehicle with up to 40% of the maximum braking force. If this braking force is insufficient, DISTRONIC PLUS warns you visually and audibly. There is a risk of an accident. In such cases, apply the brakes yourself and try to take evasive action.

! If DISTRONIC PLUS or the HOLD function

is activated, the vehicle brakes automatically in certain situations. To prevent damage to the vehicle, deactivate DISTRONIC PLUS and the HOLD function in the following or other similar situations: Rwhen towing the vehicle Rin the car wash

If you fail to adapt your driving style, DISTRONIC PLUS can neither reduce the risk of accident nor override the laws of physics. DISTRONIC PLUS cannot take into account the road, traffic and weather conditions. DISTRONIC PLUS is only an aid. You are responsible for the distance to the vehicle in front, for vehicle speed, for braking in good time and for staying in your lane. Do not use DISTRONIC PLUS: Rin road and traffic conditions which do not allow you to maintain a constant speed e.g. in heavy traffic or on winding roads Ron slippery road surfaces. Braking or

accelerating could cause the drive wheels to lose traction and the vehicle could then skid

Rwhen there is poor visibility, e.g. due to fog,

heavy rain or snow

DISTRONIC PLUS may not detect narrow vehicles driving in front, e.g. motorcycles, or vehicles driving on a different line. In particular, the detection of obstacles can be impaired if: Rdirt on the sensors or anything else

covering the sensors

Rsnow or heavy rain Rinterference by other radar sources Rstrong radar reflections, for example, in

parking garages

If DISTRONIC PLUS no longer detects a vehicle in front, DISTRONIC PLUS may unexpectedly accelerate the vehicle to the stored speed.

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177

This speed may: Rbe too high if you are driving in a filter lane

or an exit lane

Rbe so high when driving in the right-hand lane that you overtake vehicles in the left- hand lane

Rbe so high when driving in the left-hand lane that you overtake vehicles in the right-hand lane

If there is a change of drivers, advise the new driver of the speed stored. If there is no vehicle in front, DISTRONIC PLUS operates in the same way as cruise control in the speed range between 20 mph (Canada: 30 km/h) and 120 mph (Canada: 200 km/h). If a vehicle is driving in front of you, it operates in the speed range between 0 mph (0 km/h) and 120 mph (Canada: 200 km/h). Do not use DISTRONIC PLUS while driving on roads with steep gradients. As DISTRONIC PLUS transmits radar waves, it can resemble the radar detectors of the responsible authorities. You can refer to the relevant chapter in the Operator's Manual if questions are asked about this. 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. Removing, tampering with, or altering 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.

i Canada only: This device complies with RSS-210 of Industry Canada. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and

2. this device must accept any interference received, including interference that may cause undesired operation of the device. Removal, tampering, or altering of the device will void any warranties, and is not permitted. 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.

Cruise control lever

: To store the current speed or a higher

speed

; To store the current speed or a lower

speed

= To deactivate DISTRONIC PLUS ? To store the current speed or call up the

last stored speed

A To set the specified minimum distance

Switching on DISTRONIC PLUS, storing and maintaining the current speed Activation conditions In order to activate DISTRONIC PLUS, the following conditions must be fulfilled: Rthe engine must be started. It may take up

to two minutes after pulling away before DISTRONIC PLUS is operational.

Rthe parking brake must be released. RESP® must be active, but not intervening. RActive Parking Assist must not be

activated.

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Rthe transmission must be in position D. Rthe hood must be closed. Rthe driver's door must be closed when you shift from P to D or your seat belt must be fastened.

Rthe front-passenger door and rear doors

must be closed.

Rthe vehicle must not skid. Activating while driving When driving at speeds below 20 mph (30 km/h), you can only activate DISTRONIC PLUS if the vehicle in front has been detected and is shown in the multifunction display. If the vehicle in front is no longer detected and displayed, DISTRONIC PLUS switches off and a tone sounds. X Briefly pull the cruise control lever towards

you ?, or press it up : or down ;. DISTRONIC PLUS is selected.

X Press the cruise control lever repeatedly up : or down ; until the desired speed is set.

X Remove your foot from the accelerator

pedal. Your vehicle adapts its speed to that of the vehicle in front, but only up to the desired stored speed. i If you do not fully release the accelerator pedal, the DISTRONIC PLUS Override message appears in the multifunction display. The set distance to a slower- moving vehicle in front will then not be maintained. You will be driving at the speed you determine by the position of the accelerator pedal.

Activating when driving towards a stationary vehicle If the vehicle in front of you is stationary, you can only activate DISTRONIC PLUS once your vehicle is stationary as well. X Briefly pull the cruise control lever towards

you ?, or press it up : or down ;. DISTRONIC PLUS is selected.

i DISTRONIC PLUS can only be activated at under 20 mph (30 km/h) if a vehicle in front has been detected. For this reason, it is helpful if you have the DISTRONIC PLUS distance display shown in the instrument cluster (Y page 228).

X Press the cruise control lever repeatedly up : or down ; until the desired speed is set.

i You can use the cruise control lever to set

the stored speed and the control on the cruise control lever to set the specified minimum distance (Y page 180).

Pulling away X If the vehicle in front pulls away: remove

your foot from the brake pedal.

X Briefly pull the cruise control lever towards

you ?.

or X Accelerate briefly.

Your vehicle pulls away and adapts its speed to that of the vehicle in front.

Driving If there is no vehicle in front, DISTRONIC PLUS operates in the same way as cruise control. If DISTRONIC PLUS detects that the vehicle in front has slowed down, it brakes your vehicle. In this way, the distance you have selected is maintained. If DISTRONIC PLUS detects that the vehicle in front is driving faster, it accelerates your vehicle, but only up to the speed you have stored. Changing lanes If you change to the passing lane, DISTRONIC PLUS supports you when: Ryou are driving faster than 40 mph

(60 km/h)

RDISTRONIC PLUS is maintaining the

distance to a vehicle in front

Ryou switch on the appropriate turn signal RDISTRONIC PLUS does not detect a danger

of collision

If these conditions are fulfilled, your vehicle is accelerated. Acceleration will be interrupted if changing lanes takes too long or if the distance between your vehicle and the vehicle in front becomes too small. i When changing lanes, DISTRONIC PLUS

monitors the left lane on left-hand drive vehicles and the right lane on right-hand drive vehicles.

Stopping G WARNING When leaving the vehicle, even if it is braked only by DISTRONIC PLUS, it could roll away if: Rthere is a malfunction in the system or in

the voltage supply.

RDISTRONIC PLUS has been deactivated

with the cruise control lever, e.g. by a vehicle occupant or from outside the vehicle.

Rthe electrical system in the engine

compartment, the battery or the fuses have been tampered with.

Rthe battery is disconnected. Rthe accelerator pedal has been depressed,

e.g. by a vehicle occupant. There is a risk of an accident. If you wish to exit the vehicle, always turn off DISTRONIC PLUS and secure the vehicle against rolling away.

Deactivating DISTRONIC PLUS (Y page 181). If DISTRONIC PLUS detects that the vehicle in front is stopping, it brakes your vehicle until it is stationary. Once your vehicle is stationary, it remains stationary and you do not need to depress the brake. i Depending on the specified minimum

distance, your vehicle will come to a standstill at a sufficient distance behind the

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vehicle in front. The specified minimum distance is set using the control on the cruise control lever.

When DISTRONIC PLUS is activated, the transmission is shifted automatically to position P if: Rthe driver's door is open and the driver's

seat belt is unfastened.

Rthe engine is switched off, unless it is automatically switched off by the ECO start/stop function. Rthe hood is opened. Ra system malfunction occurs. Rthe power supply is not sufficient.

Setting a speed X Press the cruise control lever up : for a higher speed or down ; for a lower speed.

X To adjust the set speed in 1 mph

increments (1 km/h increments): briefly press the cruise control lever up : or down ; to the pressure point. Every time the cruise control lever is pressed up : or down ; the last speed stored is increased or reduced.

X To adjust the set speed in 5 mph

increments (10 km/h increments): briefly press the cruise control lever up : or down ; beyond the pressure point. Every time the cruise control lever is pressed up : or down ;, the last speed stored is increased or reduced.

i DISTRONIC PLUS is not deactivated if you

depress the accelerator pedal. If you accelerate to overtake, DISTRONIC PLUS adjusts the vehicle's speed to the last speed stored after you have finished overtaking.

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