2012 Mercedes-benz CL Class Owners Manual

Ronce when unlocking and three times when

locking X Press the = or ; button on the steering wheel to select the Settings menu. X Press the 9 or : button to select Acoustic Lock Feedb. X Press the a button to confirm. X To activate/deactivate: press a

again.

Activating/deactivating the radar sensor system The following systems are switched off when the radar sensor system is deactivated: RDISTRONIC PLUS (Y page 292) RBAS PLUS (Y page 62) RPRE-SAFE® Brake (Y page 66) RActive Blind Spot Assist (Y page 321)

Menus and submenus

345

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.

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. Any unauthorized modification to this device could void the user's authority to operate the equipment. X Press the = or ; button on the steering wheel to select the Settings menu. X Press 9 or : to select Radar sensors. X Press the a button to confirm. X To activate/deactivate: press a

again.

346 Display messages

Display messages General notes G WARNING All categories of messages contain important information which should be taken note of and, where a malfunction is indicated, addressed as soon as possible at an authorized Mercedes-Benz Center. Failure to repair the condition noted may cause damage not covered by the Mercedes-Benz Limited Warranty, or result in property damage or personal injury.

Display messages appear in the multifunction display. Display messages with graphic displays may be shown in simplified form in the Operator's Manual and may differ from the messages shown in the multifunction display. Please respond in accordance with the display messages and follow the additional notes in this Operator's Manual. Certain display messages are accompanied by an audible warning tone or a continuous tone. When you stop and park the vehicle, please observe the notes on the HOLD function (Y page 302) and parking (Y page 283).

Hiding display messages You can hide some display messages with a low priority. X Press the a or % button on the steering wheel to hide the display message.

The display message is cleared.

Display messages with a low priority are shown in either yellow or white. Display messages with a high priority are shown in red. You cannot hide display messages of the highest priority. The multifunction display shows these messages continuously until the causes for the messages have been remedied.

Message memory The on-board computer saves certain display messages. You can call up the display messages in the message memory. X Press the = or ; button on the steering wheel to select the Service menu. If there are display messages, the multifunction display shows, for example, 2 messages. X Press the 9 or : button to select the entry, e.g. 2 messages. X Confirm with a. X Press the 9 or : button to scroll through the display messages. When the ignition is switched off, all display messages are deleted apart from some high- priority display messages. Once the causes of the high-priority display messages have been rectified, the corresponding display messages are also deleted.

Display messages

347

Safety systems Display messages !÷ Currently Unavailable See Oper. Manual

Possible causes/consequences and M Solutions G Risk of accident ABS (Anti-lock Braking System), ESP® (Electronic Stability Program), BAS (Brake Assist), PRE-SAFE®, the HOLD function and hill start assist are temporarily unavailable. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷, å and ! warning lamps light up in the instrument cluster. The self-diagnosis function might not be complete, for example. ATTENTION ASSIST is deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Carefully drive a suitable distance making slight steering

movements at a speed above 12 mph (20 km/h). If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop. G Risk of accident ABS, ESP®, BAS, PRE-SAFE®, the HOLD function and hill start assist are temporarily unavailable. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷, å and ! warning lamps light up in the instrument cluster. For example, the on-board voltage may be insufficient. ATTENTION ASSIST is deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Drive on carefully.

If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop.

348 Display messages

Display messages !÷ Inoperative See Oper. Manual

÷ Currently Unavailable See Oper. Manual

Possible causes/consequences and M Solutions G Risk of accident ABS, ESP®, BAS, PRE-SAFE®, the HOLD function and hill start assist are unavailable due to a malfunction. BAS PLUS and PRE-SAFE® Brake may also have failed. The $ (USA only)/ J (Canada only), ÷, å and ! warning lamps in the instrument cluster also light up. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. ATTENTION ASSIST is deactivated. X Drive on carefully. X Visit a qualified specialist workshop immediately. G Risk of accident ESP®, BAS, PRE-SAFE®, the HOLD function and hill start assist are temporarily unavailable. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷ and å warning lamps light up in the instrument cluster. The self-diagnosis function might not be complete, for example. ATTENTION ASSIST is deactivated. The brake system continues to function normally, but without the functions listed above. X Carefully drive a suitable distance making slight steering

movements at a speed above 12 mph (20 km/h). If the display message disappears, the functions mentioned above are available again.

If the display message continues to be displayed: X Drive on carefully. X Visit a qualified specialist workshop. G Risk of accident If the display message is shown and the ÷ warning lamp flashes at the same time, the Electronic Traction System is deactivated. Otherwise, the brakes on the drive wheels could overheat. X Let the brakes cool down until the display message disappears

and the ÷ warning lamp goes out. The Electronic Traction System is activated again.

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349

Display messages ÷ Inoperative See Oper. Manual

å System Inoperative

T! ÷ Inoperative See Oper. Manual

Check Brake Pad Wear

Possible causes/consequences and M Solutions G Risk of accident ESP®, BAS, PRE-SAFE®, the HOLD function and hill start assist are unavailable due to a malfunction. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷ and å warning lamps light up in the instrument cluster. ATTENTION ASSIST is deactivated. The brake system continues to function normally, but without the functions listed above. X Drive on carefully. X Visit a qualified specialist workshop. G Risk of accident ESP®, BAS, PRE-SAFE®, the HOLD function and hill start assist are unavailable due to a malfunction. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷ and å warning lamps light up in the instrument cluster. ATTENTION ASSIST is deactivated. X Drive on carefully. X Visit a qualified specialist workshop. G Risk of accident EBD (electronic brake force distribution), ABS, ESP®, BAS, PRE- SAFE®, the HOLD function and hill start assist are unavailable due to a malfunction. BAS PLUS and PRE-SAFE® Brake may also have failed. In addition, the ÷, å and ! warning lamps light up in the instrument cluster and a warning tone sounds. ATTENTION ASSIST is deactivated. The brake system continues to function normally, but without the functions listed above. The wheels could therefore lock if you brake hard, for example. X Drive on carefully. X Visit a qualified specialist workshop immediately.

The brake pads/linings have reached their wear limit. X Visit a qualified specialist workshop.

350 Display messages

Display messages F(USA only)!(Canada only) Please Release Parking Brake

Possible causes/consequences and M Solutions The red F (USA only)/ ! (Canada only) indicator lamp flashes and a warning tone sounds. You are driving with the electric parking brake applied. X Release the electric parking brake. or X Pull away carefully (Y page 284).

The red F (USA only)/ ! (Canada only) indicator lamp flashes and a warning tone sounds. You are making an emergency stop using the electric parking brake (Y page 284). X After the emergency stop: release the electric parking brake

lever.

The red F (USA only)/ ! (Canada only) indicator lamp flashes, the yellow F (USA only)/ ! (Canada only) warning lamp lights up and a warning tone sounds. The electric parking brake is malfunctioning and the braking effect is restricted. While the vehicle is in motion: X Release the electric parking brake handle. While the vehicle is stationary: X Switch off the ignition and turn it back on. X Release the electric parking brake. If the display message continues to be displayed: X Shift the transmission to P. X Use the folding wheel chock (Y page 426) from the vehicle tool

kit to secure the vehicle against rolling away.

X Consult a qualified specialist workshop.

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351

Display messages F(USA only)!(Canada only) Parking Brake See Oper. Manual

Possible causes/consequences and M Solutions The yellow F (USA only)/ ! (Canada only) warning lamp lights up. Additionally, the red F (USA only)/ ! (Canada only) indicator lamp may light up. The electric parking brake is malfunctioning. To release: X Pull the electric parking brake handle. or X Pull away carefully. X Visit a qualified specialist workshop. To apply: X Switch off the ignition. X Pull the electric parking brake lever for at least ten seconds,

until the display message disappears.

If the display message continues to be displayed: X Shift the transmission to P. X Use the folding wheel chock (Y page 426) from the vehicle tool

kit to secure the vehicle against rolling away.

X Consult a qualified specialist workshop. The red F (USA only)/ ! (Canada only) indicator lamp lights up. The power supply for the electric parking brake was interrupted. X Pull the electric parking brake handle. or X Pull away carefully. or X Pull the electric parking brake handle until the display message

disappears.

The red F (USA only)/ ! (Canada only) indicator lamp flashes and the yellow F (USA only)/ ! (Canada only) warning lamp lights up. The electric parking brake is malfunctioning. X Switch off the ignition and turn it back on. X Engage or release the electric parking brake. or X Pull away carefully. X Visit a qualified specialist workshop.

352 Display messages

Display messages

Possible causes/consequences and M Solutions The yellow F (USA only)/ ! (Canada only) warning lamp lights up. The red F (USA only)/ ! (Canada only) indicator lamp flashes for approximately 10 seconds after the electric parking brake has been applied or released. It then goes out or remains lit. The electric parking brake is malfunctioning, e.g. because of overvoltage or undervoltage. X Pull away carefully. X Visit a qualified specialist workshop. If there is overvoltage or undervoltage: X Remove the cause for the overvoltage or undervoltage, e.g. by

charging the battery or restarting the engine.

X Switch the ignition off and on, and then engage or release the

electric parking brake.

If this does not release the electric parking brake: X Do not drive on. X Consult a qualified specialist workshop. The yellow F (USA only)/ ! (Canada only) warning lamp lights up. The red F (USA only)/ ! (Canada only) indicator lamp flashes for approximately 10 seconds after the electric parking brake has been applied or released. It then goes out or remains lit. The electric parking brake has overheated. X Allow the vehicle to cool down. Do not engage or release the

electric parking brake during this time.

X Use the folding wheel chock (Y page 426) from the vehicle tool

kit to secure the vehicle against rolling away.

X When the vehicle has cooled down: switch the ignition off and

on again, then engage or release the electric parking brake.

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353

Display messages F(USA only)!(Canada only) Parking Brake Inoperative

F(USA only)!(Canada only) Turn On the Ignition to Release the Parking Brake $(USA only)J(Canada only) Service See Oper. Manual $(USA only)J(Canada only) Check Brake Fluid Level

Possible causes/consequences and M Solutions The yellow F (USA only)/ ! (Canada only) warning lamp lights up. The red F (USA only)/ ! (Canada only) indicator lamp flashes for approximately 10 seconds after the electric parking brake has been applied or released. It then goes out or remains lit. The electric parking brake is malfunctioning. X Switch the ignition off and on, and then engage the electric

parking brake.

If it is not possible to engage the electric parking brake: X Shift the transmission to P. X Use the folding wheel chock (Y page 426) from the vehicle tool

kit to secure the vehicle against rolling away.

X Consult a qualified specialist workshop. The red F (USA only)/ ! (Canada only) indicator lamp lights up. You attempted to release the electric parking brake while the ignition was switched off. X SmartKey: turn the SmartKey to position 1 in the ignition lock. X KEYLESS-GO: switch on the ignition.

There is a malfunction in the system. The brake system continues to operate normally. X Drive on carefully. X Visit a qualified specialist workshop.

G Risk of accident There is not enough brake fluid in the brake fluid reservoir. Additionally, the red $ (USA only)/ J (Canada only) warning lamp lights up in the instrument cluster and a warning tone sounds. X Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.

X Engage the electric parking brake. X Consult a qualified specialist workshop. X Do not add brake fluid. This will not rectify the malfunction.

354 Display messages

G WARNING Driving with the message Check Brake Fluid Level displayed can result in an accident. Have your brake system checked immediately. Do not add brake fluid before checking the brake system. Overfilling the brake fluid reservoir can result in spilling brake fluid on hot engine parts and the brake fluid catching fire. You can be seriously burned.

Display messages Tele Aid Inoperative

PRE-SAFE Inoperative See Oper. Manual

Possible causes/consequences and M Solutions USA only: one or more of the main functions in the mbrace system are malfunctioning. Canada only: one or more of the main functions of the TELEAID system are malfunctioning. X USA only: have the mbrace system checked at a qualified

specialist workshop.

X Canada only: have the TELEAID system checked at a qualified

specialist workshop.

G Risk of injury Important functions of PRE-SAFE® have failed. All other occupant safety systems, e.g. air bags, remain available. X Visit a qualified specialist workshop immediately.

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355

Display messages PRE-SAFE Functions Currently Limited See Operator's Manual

PRE-SAFE Function Limited See Oper. Manual

SRS Malfunction Service Required

Possible causes/consequences and M Solutions G Risk of accident PRE-SAFE® Brake is temporarily inoperative if: Rthe DISTRONIC PLUS cover in the radiator grill is dirty. Rthe sensors in the bumpers are dirty. Rits function is impaired due to heavy rain or snow. Rthe radar sensor system is temporarily inoperative, e.g. due to

electromagnetic radiation emitted by nearby TV or radio stations or other sources of electromagnetic radiation. Rthe system is outside the operating temperature range. Rthe on-board voltage is too low. PRE-SAFE® Brake is operational again and the display message disappears if: Rthe dirt (e.g. slush) drops away while the vehicle is in motion. Rthe system detects that the sensors are fully available again. Rthe system is within the operating temperature range. If the display message continues to be displayed: X Clean the DISTRONIC PLUS cover in the radiator grill

(Y page 418).

X Clean the bumpers (Y page 418). X Restart the engine. X Wait until the battery is sufficiently charged. G Risk of accident PRE-SAFE® Brake is defective. BAS PLUS or the distance warning signal may also have failed. X Visit a qualified specialist workshop. G Risk of injury There is a malfunction in the SRS (Supplemental Restraint System). The 6 warning lamp also lights up in the instrument cluster. X Visit a qualified specialist workshop.

356 Display messages

Display messages Front Left SRS Malfunction Service Required or Front Right SRS Malfunction Service Required Rear Left SRS Malfunction Service Required or Rear Right SRS Malfunction Service Required Left Side Curtain Airbag Malfunction Service Required or Right Side Curtain Airbag Malfunction Service Required

Possible causes/consequences and M Solutions G Risk of injury SRS has malfunctioned at the front on the left or right. The 6
warning lamp also lights up in the instrument cluster. X Visit a qualified specialist workshop.

G Risk of injury SRS has malfunctioned at the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster. X Visit a qualified specialist workshop.

G Risk of injury There is a malfunction in the left-hand and/or right-hand window curtain air bag. The 6 warning lamp also lights up in the instrument cluster. X Visit a qualified specialist workshop.

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

Display messages

357

Display messages Front Passenger Airbag Enabled See Oper. Manual

Possible causes/consequences and M Solutions The front-passenger air bag is enabled during the journey, even though: Ra child, a small adult or an object weighing less than the

system's weight threshold is located on the front-passenger seat.

Rthe front-passenger seat is unoccupied. The system may detect objects or forces applying additional weight on the seat. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Engage the parking brake. X Switch off the ignition. X Open the front-passenger door. X Remove the child and the child restraint system from the front-

passenger seat.

X If necessary, secure the child in a child restraint system on a

suitable rear seat.

X Make sure that there are no objects on the seat adding to the

weight. The system may otherwise detect the additional weight and interpret the seat occupant's weight as greater than it actually is.

X Keep the seat unoccupied, close the front-passenger door and

switch on the ignition.

Observe the 42(Y page 46) indicator lamp and the multifunction display and check the following: Seat unoccupied and ignition switched on: Rthe 42 indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Y page 46) has deactivated the front-passenger air bag. Rthe Front Passenger Airbag Enabled See Oper. Manual or Front Passenger Airbag Disabled See Oper. Manual display messages must not appear in the multifunction display. Wait for a period of at least 60 seconds until the necessary system checks have been completed and to make sure that the display messages do not appear in the multifunction display.

If the conditions are not fulfilled, the system is not operating correctly. X Visit a qualified specialist workshop immediately.

358 Display messages

G WARNING If the 42 indicator lamp remains off even after performing the above corrective steps, do not have any children 12 years old and under and other small individuals use the front- passenger seat until the system has been repaired.

Display messages Front Passenger Airbag Disabled See Oper. Manual

Possible causes/consequences and M Solutions The front-passenger air bag is deactivated during the journey even though an adult or a person larger than a certain size is occupying the front-passenger seat. If additional forces are applied to the seat, the system may interpret the occupant's weight as lower than it actually is. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Engage the parking brake. X Switch off the ignition. X Have the occupant get out of the vehicle. X Keep the seat unoccupied, close the front-passenger door and

switch on the ignition.

Observe the 42(Y page 46) indicator lamp and the multifunction display and check the following: Seat unoccupied and ignition switched on: Rthe 42 indicator lamp must light up and remain lit. When the indicator lamp is on, OCS (Y page 46) has deactivated the front-passenger air bag. Rthe Front Passenger Airbag Enabled See Oper. Manual or Front Passenger Airbag Disabled See Oper. Manual display messages must not appear in the multifunction display. Wait for a period of at least 60 seconds until the necessary system checks have been completed and to make sure that the display messages do not appear in the multifunction display. If these conditions are fulfilled, the front-passenger seat can be occupied again. Whether the 42 indicator lamp remains lit or goes out depends on how OCS classifies the occupant. If the conditions are not fulfilled, the system is not operating correctly. X Visit a qualified specialist workshop immediately.

G WARNING If the 42 indicator lamp remains lit with an adult occupant on the front-passenger seat even after performing the above corrective steps, do not have any passenger use the front- passenger seat until the system has been repaired.

Lights i Display messages about LEDs:

Display messages

359

Possible causes/consequences and M Solutions The left or right-hand cornering light is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

This display message will only appear if all LEDs have failed. Display messages Check Left Cornering Light or Check Right Cornering Light Check Left Low Beam or Check Right Low Beam

or X Visit a qualified specialist workshop.

or X Visit a qualified specialist workshop.

(Y page 250).

The left or right-hand low-beam headlamp is defective. X Check whether you are permitted to change the bulb yourself

Check Rear Left Turn Signal or Check Rear Right Turn Signal Check Front Left Turn Signal or Check Front Right Turn Signal Check Left Mirror Turn Signal or Check Right Mirror Turn Signal

The rear left-hand or rear right-hand turn signal is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The front left-hand or front right-hand turn signal is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The turn signal in the left-hand or right-hand exterior mirror is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

360 Display messages

Display messages Check Center Brake Lamp

Check Left Tail and Brake Lamp or Check Right Tail and Brake Lamp Check Left High Beam or Check Right High Beam

Check Left License Plate Lamp or Check Right License Plate Lamp Check Left Fog Lamp or Check Right Fog Lamp

Check Rear Left Fog Lamp or Check Rear Right Fog Lamp

Check Front Left Parking Lamp or Check Front Right Parking Lamp

Possible causes/consequences and M Solutions The high-mounted brake lamp is faulty. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left or right-hand tail lamp/brake lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left or right-hand high beam is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left or right-hand license plate lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left-hand or right-hand front fog lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left-hand or right-hand rear fog lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The front left or front right parking or standing lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

Display messages Check Left Reverse Lamp or Check Right Reverse Lamp

Check Front Left Sidemarker Lamp or Check Front Right Sidemarker Lamp Check Rear Left Sidemarker Lamp or Check Rear Right Sidemarker Lamp Check Left Daytime Running Light or Check Right Daytime Running Light Active Headlamps Inoperative Malfunction See Oper. Manual AUTO Lamp Function Inoperative

Display messages

361

Possible causes/consequences and M Solutions The left or right-hand backup lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left or right front side marker lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The rear left or right side marker lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The left or right-hand daytime running lamp is defective. X Check whether you are permitted to change the bulb yourself

(Y page 250).

or X Visit a qualified specialist workshop.

The active light function is defective. X Visit a qualified specialist workshop.

The exterior lighting is defective. X Visit a qualified specialist workshop.

The light sensor is defective. X Visit a qualified specialist workshop. USA only: X Switch off the daytime running lamps in the on-board computer

(Y page 343).

X Switch the lights on and off using the light switch.

362 Display messages

Display messages Please Switch Off Lights

Adaptive High-beam Assist inoperative

Engine Display messages Check Coolant Level See Oper. Manual

Possible causes/consequences and M Solutions The lights are still switched on when you leave the vehicle. A warning tone also sounds. X Turn the light switch to $ or c. or X If the rear fog lamp is switched on: press the light switch in to

the stop.

Adaptive Highbeam Assist is defective. X Visit a qualified specialist workshop.

Possible causes/consequences and M Solutions The coolant level is too low. X Add coolant, observing the warning notes when doing so

(Y page 411).

X If coolant needs to be added more often than usual, have the

engine coolant system checked at a qualified specialist workshop.

G WARNING Do not spill antifreeze on hot engine parts. Antifreeze contains ethylene glycol which may burn if it comes into contact with hot engine parts. You could be seriously burned.

! The coolant level is too low. Avoid making long journeys with too little coolant in the cooling

system. The engine will otherwise be damaged. The display messages and the corresponding symbol that indicate that the coolant level is too low must not be ignored.

Display messages

363

Display messages Coolant Low Stop Vehicle Turn Engine Off

Possible causes/consequences and M Solutions The coolant is too hot. X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Make sure that the air supply to the engine radiator is not

blocked, e.g. by snow, slush or ice.

X Wait until the display message disappears before restarting the

engine. Otherwise, there is a risk of engine damage.

X Pay attention to the coolant temperature display. X If the temperature increases again, visit a qualified specialist

workshop immediately.

The poly-V-belt may have torn. X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Open the hood. X Check whether the poly-V-belt is torn. If the poly-V-belt is torn: ! Do not continue driving. The engine could otherwise overheat. X Consult a qualified specialist workshop. If the poly-V-belt is not damaged: X Wait until the display message disappears before restarting the

engine. Otherwise, there is a risk of engine damage.

X Pay attention to the coolant temperature display. X Visit a qualified specialist workshop.

G WARNING Driving when your engine is overheated can cause some fluids which may have leaked into the engine compartment to catch fire. You could be seriously burned. Steam from an overheated engine can cause serious burns which can occur just by opening the engine hood. Stay away from the engine if you see or hear steam coming from it. Stop the vehicle in a safe location away from other traffic. Turn off the engine, get out of the vehicle and do not stand near the vehicle until the engine has cooled down.

! If the coolant temperature exceeds 248 ‡(120 †) do not continue driving. The engine will

otherwise be damaged.

364 Display messages

Display messages ? The engine fan is defective.

Possible causes/consequences and M Solutions

X At coolant temperatures under 248 ‡ (120 † ), drive to the next

qualified specialist workshop.

X Avoid subjecting the engine to heavy loads, e.g. driving in

mountainous terrain, and stop-and-go traffic.

# The battery is not being charged.

Possible causes are: Ra defective alternator Ra torn poly-V-belt Ra malfunction in the electronics X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Open the hood. X Check whether the poly-V-belt is torn. If the poly-V-belt is torn: ! Do not continue driving. The engine could otherwise overheat. X Consult a qualified specialist workshop. If the poly-V-belt is not damaged: X Visit a qualified specialist workshop.

Check Engine Oil at Next Refueling

Check Engine Oil Level (Add 1 quart) (USA only)Check Engine Oil Level (Add 1 Liter) (Canada only)

Vehicles with an oil dipstick: the oil level has dropped to the minimum level. X Check the engine oil level at the latest when next refueling

(Y page 409).

X If necessary, add engine oil (Y page 410). X If engine oil needs to be added more often than usual, have the

engine checked at a qualified specialist workshop.

Vehicles without an oil dipstick: the engine oil level is too low. X Check the oil level (Y page 409). X If necessary, add engine oil (Y page 409). X If engine oil needs to be added more often than usual, have the

engine checked at a qualified specialist workshop.

Information on approved engine oils can be obtained from any qualified specialist workshop or on the Internet at http://www.mbusa.com (USA only).

Display messages

365

! The oil level is too low. Avoid long journeys with too little engine oil. There is a risk of

engine damage. The display messages and the corresponding symbol that indicate that the oil level is too low must not be ignored. Display messages Engine Oil Level Low Stop Vehicle Turn Engine Off

Possible causes/consequences and M Solutions Vehicles without an oil dipstick: the engine oil level is too low. There is a risk of engine damage. X Pull over and stop the vehicle safely and switch off the engine,

paying attention to road and traffic conditions.

X Apply the parking brake. X Add engine oil (Y page 410) and check the oil level

(Y page 409).

Engine Oil Level Too High

Vehicles without an oil dipstick: you have added too much engine oil. There is a risk of damage to the engine or to the catalytic converter. X Have the excess oil siphoned off at a qualified specialist

workshop. Observe the legal requirements.

Vehicles without an oil dipstick: the measuring system is defective. X Visit a qualified specialist workshop.

Engine Oil Level Cannot Be Measured Reserve Fuel C There is only a very small amount of fuel in the fuel tank.

The fuel level has dropped into the reserve range. X Refuel at the nearest gas station.

Gas Cap Loose

X Refuel at the nearest gas station without fail. The fuel system pressure is too low. The fuel filler cap is not closed correctly or the fuel system is leaking. X Check that the fuel filler cap is correctly closed. If the fuel filler cap is not correctly closed: X Close the fuel filler cap. If the fuel filler cap is correctly closed: X Visit a qualified specialist workshop.

366 Display messages

Driving systems Display messages À Attention Assist: Pause!

À Attention Assist Inoperative Á Night View Assist Inoperative Á Night View Assist Currently Unavailable

Á Night View Assist Lights Must Be Set to AUTO or ON Á Night View Assist Not In Reverse Gear Á Night View Assist Lights ON or AUTO, Not in R Gear

Possible causes/consequences and M Solutions Based on specific criteria, ATTENTION ASSIST has determined that the driver is tired or paying less attention. A warning tone also sounds. X If necessary, take a break. During long journeys, take regular breaks in good time so you get enough rest.

ATTENTION ASSIST has failed. X Visit a qualified specialist workshop.

Night View Assist Plus is defective. X Visit a qualified specialist workshop.

The temperature of the camera is too high. X Wait until you see the Night View Assist Available Again display message. You can also: X Fold the camera cover down (Y page 419). X Adjust the air distribution of the automatic air conditioning

upwards.

A condition for activating Night View Assist Plus has not been fulfilled. X Turn the light switch to c or L.

A condition for activating Night View Assist Plus has not been fulfilled. X Shift the transmission to P, N or D.

A condition for activating Night View Assist Plus has not been fulfilled. X Turn the light switch to c or L. X Shift the transmission to P, N or D.

Display messages

367

Display messages Á Night View Assist Only When It Is Dark ¨ Vehicle Rising ¨ Vehicle Rising Please Wait Briefly

¨ STOP Car Too Low

¨ Malfunction

Possible causes/consequences and M Solutions You have attempted to activate Night View Assist Plus in the daytime. Night View Assist Plus can only be activated when it is dark.

Your vehicle is adjusting to the level you have selected.

The vehicle level is too low when the vehicle is stationary. A warning tone also sounds. X Do not pull away.

The vehicle level is set when the display message disappears.

You have pulled away while the vehicle level is still too low. AIRMATIC sets the vehicle to the selected level after a short period. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions.

X Apply the electric parking brake. X Wait until the display message disappears before pulling away. G Risk of accident AIRMATIC is defective. A warning tone also sounds. X Do not drive faster than 50 mph (80 km/h). X Make only slight steering movements. Otherwise, the front

fender or the tires could be damaged if the steering movement is too large.

X Listen for scraping sounds. X Pull over and stop the vehicle safely, paying attention to road

and traffic conditions, and select a higher vehicle level. Depending on the malfunction, it may be possible to raise the vehicle.

X Visit a qualified specialist workshop. G Risk of accident The AIRMATIC function is restricted. The vehicle's handling characteristics may be affected. X Do not drive faster than 50 mph (80 km/h). X Visit a qualified specialist workshop.

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Display messages ABC Malfunction Stop Vehicle

ABC Vehicle Rising Please Wait Briefly ABC Malfunction

HOLD Off

Possible causes/consequences and M Solutions The ABC (Active Body Control) vehicle level is too low. X Pull over and stop the vehicle safely as soon as possible, paying

attention to road and traffic conditions. After a few seconds, the vehicle level is adjusted and the display message disappears.

The vehicle is leaking oil. The display message is shown continuously. X Pull over and stop the vehicle safely as soon as possible, paying attention to road and traffic conditions. Do not continue driving under any circumstances.

X Notify a qualified specialist workshop or breakdown service. The display message is shown continuously. ABC is malfunctioning. X Do not drive faster than 50 mph (80 km/h). X Make only slight steering movements. Otherwise, the front

fender or the tires could be damaged if the steering movement is too large.

X Listen for scraping sounds. X Visit a qualified specialist workshop. The ABC vehicle level is too low when the vehicle is stationary. X Do not pull away.

The vehicle level is set when the display message disappears.

The ABC function is restricted. The vehicle's handling characteristics may be affected. X Do not drive faster than 50 mph (80 km/h). X Visit a qualified specialist workshop. The HOLD function is deactivated. The vehicle is skidding. A warning tone also sounds. X Reactivate the HOLD function later (Y page 302).

The HOLD function is deactivated. When the brake pedal is firmly depressed, an activation condition is not fulfilled. A warning tone also sounds. X Check the activation conditions for the HOLD function

(Y page 302).

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Display messages Radar Sensors Deactivated See Oper. Manual Active Lane Keeping Assist Currently Unavailable See Oper. Manual

Active Lane Keeping Assist Inoperative Active Blind Spot Assist Currently Unavailable, See Oper. Manual

Possible causes/consequences and M Solutions The radar sensor system is deactivated. X Switch on the radar sensor system (Y page 344).

Active Lane Keeping Assist is deactivated and temporarily inoperative if: Rthe windshield is dirty in the camera's field of vision. Rvisibility is impaired due to heavy rain, snow or fog. Rthere are no lane markings for a longer period. Rthe lane markings are worn, dark or covered, for example by dirt

or snow.

Active Lane Keeping Assist is operational again and the display message disappears if: Rthe dirt (e.g. slush) drops away while the vehicle is in motion. Rthe system recognizes that the camera is fully operational again. If the display message continues to be displayed: X Clean the windshield.

Active Lane Keeping Assist is defective. X Visit a qualified specialist workshop.

Active Blind Spot Assist is temporarily inoperative if: Rthe sensors are dirty. Rits function is impaired due to heavy rain or snow. Rthe radar sensor system is outside the operating temperature

range.

Rthe radar sensor system is temporarily inoperative, e.g. due to

electromagnetic radiation emitted by nearby TV or radio stations or other sources of electromagnetic radiation.

The yellow 9 indicator lamps also light up in the exterior mirrors. Active Blind Spot Assist is operational again and the display message disappears if: Rthe dirt (e.g. slush) drops away while the vehicle is in motion. Rthe system detects that the sensors are fully available again. Rthe radar sensor system is back within the operating

temperature range.

If the display message continues to be displayed: X Clean the sensors (Y page 418). X Restart the engine.

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Display messages Active Blind Spot Assist Inoperative

Parking Guidance Inoperative

Parking Guidance Canceled

Parking Guidance Finished DISTRONIC PLUS Off DISTRONIC PLUS Available Again

Possible causes/consequences and M Solutions Active Blind Spot Assist is defective. The yellow 9 indicator lamps also light up in the exterior mirrors. X Visit a qualified specialist workshop. Parking Guidance is malfunctioning (Y page 310). X Restart the engine. If the display message continues to be displayed: X Visit a qualified specialist workshop.

Parking Guidance has been deactivated because: Rthe vehicle is skidding. Rthe sensors are dirty. Ra malfunction has occurred. X Reactivate Parking Guidance later (Y page 310). If the parking space symbol is not displayed in the multifunction display when you are driving at a speed of less than 19 mph (30 km/h): X Clean the sensors (Y page 418). X Restart the engine. If the parking space symbol is still not displayed in the multifunction display when you are driving at a speed of less than 19 mph (30 km/h): X Visit a qualified specialist workshop. Parking Guidance has been deactivated because you are no longer following the recommended path. X Park again and, while doing so, observe the display messages

in the multifunction display.

The vehicle is parked. A warning tone also sounds. The display message disappears automatically. DISTRONIC PLUS has been deactivated (Y page 292). If it was deactivated automatically, a warning tone also sounds.

DISTRONIC PLUS is operational again after having been temporarily unavailable. You can now reactivate DISTRONIC PLUS (Y page 292).

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Display messages DISTRONIC PLUS Currently Unavailable See Operator's Manual

DISTRONIC PLUS Inoperative

DISTRONIC PLUS Override

DISTRONIC PLUS --- mph