2015 MERCEDES-BENZ CLS-Class Owner's Manual

Display messages
Possible causes/consequences and
M
MSolutions X
Wait for a period of at least 60 seconds until the necessary sys-
tem checks have been completed.
X Make sure that the display messages do not appear in the mul-
tifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIR BAG OFF 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 cor- rectly.
X Visit a qualified specialist workshop immediately.
Observe the additional information on OCS (Y page 54).Lights
i Vehicles with LED bulbs in the light clusters:
The display message for the corresponding light will only appear if all the LEDs have failed. Display messages
Possible causes/consequences and
M MSolutions b
Check Left Corner‐ Check Left Corner‐
ing Light ing Light
orCheck
Check
Right Cornering
Right Cornering
Light Light The left or right-hand cornering light is defective.
X Visit a qualified specialist workshop. b
Check Left Low Check Left Low
Beam Beam
orCheck
Check
Right Low Beam
Right Low Beam The left or right-hand low-beam headlamp is defective.
X Visit a qualified specialist workshop. b
Check Rear Left Check Rear Left
Turn Signal Turn Signal
or
Check Rear Right
Check Rear Right
Turn Signal Turn Signal The rear left-hand or rear right-hand turn signal is defective.
X Visit a qualified specialist workshop. b
Check Front Left Check Front Left
Turn Signal Turn Signal
or
Check Front Right
Check Front Right
Turn Signal Turn Signal The front left-hand or front right-hand turn signal is defective.
X Visit a qualified specialist workshop. Display
messages
255On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions b
Check Left Mirror Check Left Mirror
Turn Signal Turn Signal
or
Check
Check Right
RightMirror
Mirror
Turn Signal
Turn Signal The turn signal in the left-hand or right-hand exterior mirror is
defective.
X Visit a qualified specialist workshop. b
Check Check
Center
Center Brake
Brake
Lamp
Lamp The high-mounted brake lamp is faulty.
X
Visit a qualified specialist workshop. b
Check Left Tail Check Left Tail
and Brake Lamps and Brake Lamps
or
Check Right Tail
Check Right Tail
and Brake Lamps and Brake Lamps The left or right-hand tail lamp/brake lamp is defective.
X Visit a qualified specialist workshop. b
Check Left High Check Left High
Beam Beam
orCheck
Check
Right High Beam
Right High Beam The left or right-hand high beam is defective.
X Visit a qualified specialist workshop. b
Check Check
Left
LeftLicense
License
Plate Lamp
Plate Lamp or
Check Right
Check Right
License Plate Lamp License Plate Lamp The left or right-hand license plate lamp is faulty.
X Visit a qualified specialist workshop. b
Rear fog lamp Rear fog lamp The rear fog lamp is faulty.
X Visit a qualified specialist workshop. b
Check Front Left Check Front Left
Parking Lamp Parking Lamp
or
Check Front Right
Check Front Right
Parking Lamp Parking Lamp The front left or front right parking or standing lamp is defective.
X Visit a qualified specialist workshop. b
Check Check
Left
LeftReverse
Reverse
Lamp
Lamp orCheck
Check
Right Reverse Lamp Right Reverse Lamp The left or right-hand backup lamp is defective.
X Visit a qualified specialist workshop. 256
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions b
Check Front Left Check Front Left
Sidemarker Lamp Sidemarker Lamp
or
Check Front Right
Check Front Right
Sidemarker Lamp Sidemarker Lamp The front left-hand or front right-hand side marker lamp is faulty.
X Visit a qualified specialist workshop. b
Check Rear Left Check Rear Left
Sidemarker Lamp Sidemarker Lamp
or
Rear right side
Rear right side
marker lamp marker lamp The rear left-hand or rear right-hand side marker lamp is faulty.
X Visit a qualified specialist workshop. b
Check Check
Left
LeftDaytime
Daytime
Running Light
Running Light or
Check Right Day‐
Check Right Day‐
time Running Light time Running Light The left or right-hand daytime running lamp is faulty.
X Visit a qualified specialist workshop. b
Active Light Sys‐ Active Light Sys‐
tem Inoperative tem Inoperative The active light function is faulty.
X Visit a qualified specialist workshop. b
Malfunction See Malfunction See
Operator's Manual Operator's Manual The exterior lighting is defective.
X Visit a qualified specialist workshop. b
Auto Auto
Lamp
LampFunction
Function
Inoperative
Inoperative The light sensor is defective.
X Visit a qualified specialist workshop. b
Switch Off Lights Switch Off Lights The lights are still switched on when you leave the vehicle. A
warning tone also sounds.
X Turn the light switch to Ã. Display
messages
257On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions Adaptive Highbeam
Adaptive Highbeam
Assist Currently Assist Currently
Unavailable See Unavailable See
Operator's Manual Operator's Manual Adaptive Highbeam Assist is deactivated and temporarily inoper-
ative. Possible causes are:
R the windshield in the camera's field of vision is dirty.
R visibility is impaired due to heavy rain, snow or fog.
X Clean the windshield.
If the system detects that the camera is fully operational again, the
Adaptive
Adaptive Highbeam
HighbeamAssist
Assistavailable
available again
againmessage is dis-
played.
Adaptive Highbeam Assist is operational again. Adaptive Highbeam Adaptive Highbeam
Assist Inoperative Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. Engine
Display messages
Possible causes/consequences and
M MSolutions +
Check Coolant Check Coolant
Level See Opera‐ Level See Opera‐
tor's Manual tor's Manual The coolant level is too low.
! Avoid making long journeys with too little coolant in the engine
cooling system. The engine will otherwise be damaged.
X Add coolant, observing the warning notes before doing so
(Y page 315).
X If coolant needs to be added more often than usual, have the
engine coolant system checked at a qualified specialist work-
shop. ? The fan motor is faulty.
X At coolant temperatures below 248 ‡ (120 †), drive to the
nearest qualified specialist workshop.
X Avoid subjecting the engine to heavy loads, e.g. driving in moun-
tainous terrain, and stop-and-go traffic. 258
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions ?
Coolant Too Hot Coolant Too Hot
Stop Vehicle Turn Stop Vehicle Turn
Engine Off Engine Off The coolant is too hot.
A warning tone also sounds.
G WARNING
Do not drive when your engine is overheated. This can cause some
fluids which may have leaked into the engine compartment to
catch fire.
Steam from the overheated engine can also cause serious burns
which can occur just by opening the hood.
There is a risk of injury.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 170).
X Wait until the engine has cooled down.
X Make sure that the air supply to the engine radiator is not
blocked, e.g. by snow, slush or ice.
X Do not start the engine again until the display message goes out
and the coolant temperature is below 248 ‡ (120 †). Other-
wise, the engine could be damaged.
X Pay attention to the coolant temperature display.
X If the temperature increases again, visit a qualified specialist
workshop immediately.
Under normal operating conditions and with the specified coolant
level, the coolant temperature may rise to 248 ‡ (120 †). #
See See
Operator's
Operator's Man‐
Man‐
ual
ual The battery is not being charged.
A warning tone also sounds.
Possible causes are:
R a defective alternator
R a torn poly-V-belt
R a malfunction in the electronics
! Do not continue driving. The engine could otherwise overheat.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 170).
X Consult a qualified specialist workshop. Display
messages
259On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions #
Stop Vehicle See Stop Vehicle See
Operator's Manual Operator's Manual The battery is no longer being charged and the battery charge level
is too low.
A warning tone also sounds.
X Pull over and stop the vehicle safely and switch off the engine,
paying attention to road and traffic conditions.
X Secure the vehicle against rolling away (Y page 170).
X Observe the instructions in the #See SeeOperator's
Operator's Manual
Manual
display message.
X Consult a qualified specialist workshop. #
Start Engine See Start Engine See
Operator's Manual Operator's Manual The engine is switched off and the battery charge level is too low.
X Switch off electrical consumers that you do not need, such as
the rear window defroster and interior lighting.
X Leave the engine running for a few minutes or drive a long dis-
tance.
The battery is being charged. 4
Check Engine Oil Check Engine Oil
At Next Refueling At Next Refueling The engine oil level has dropped to the minimum level.
A warning tone also sounds.
! Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
X Check the oil level when next refueling, at the latest
(Y page 313).
X If necessary, add engine oil (Y page 314).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 4
Check Engine Oil Check Engine Oil
Level Level
(Add
(Add1
1quart)
quart) AMG vehicles: the engine oil level is too low.
!
Avoid long journeys with too little engine oil. The engine will
otherwise be damaged.
X Check the oil level when next refueling, at the latest
(Y page 313).
X If necessary, add engine oil (Y page 314).
X Have the engine checked at a qualified specialist workshop if
engine oil needs to be added more often than usual.
Information on approved engine oils can be obtained from any
qualified specialist workshop or on the Internet at http://
bevo.mercedes-benz.com. 260
Display
messagesOn-board computer and displays

Display messages
Possible causes/consequences and
M
MSolutions 4
Engine Oil Level Engine Oil Level
Stop Vehicle Turn Stop Vehicle Turn
Engine Off Engine Off 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 Secure the vehicle against rolling away (Y page 170).
X Check the engine oil level (Y page 313).
X If necessary, add engine oil (Y page 314).8
Fuel Level Low Fuel Level Low The fuel level has dropped into the reserve range.
X Refuel at the nearest gas station. C There is only a very small amount of fuel in the fuel tank.
X Refuel at the nearest gas station without fail. 8
Gas Cap Loose Gas Cap Loose 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. Driving systems
Display messages
Possible causes/consequences and
M
MSolutions À
Attention Assist: Attention Assist:
Take a Break! Take a Break! Based on certain criteria, ATTENTION ASSIST has detected fatigue
or a lack of concentration on the part of the driver. 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. À
Attention Assist Attention Assist
Inoperative Inoperative ATTENTION ASSIST is inoperative.
X Visit a qualified specialist workshop. ¨
Vehicle Rising Vehicle Rising Your vehicle is adjusting to the level you have selected. Display
messages
261On-board computer and displays Z

Display messages
Possible causes/consequences and
M
MSolutions ¨
Vehicle Rising Vehicle Rising
Please Wait Please Wait The vehicle level is too low when the vehicle is stationary. A warn-
ing tone also sounds.
X Do not pull away.
The vehicle level is set when the display message disappears. ¨
Stop Vehicle Vehi‐ Stop Vehicle Vehi‐
cle Too Low cle Too Low 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 Secure the vehicle against rolling away (Y page 170).
X Wait until the display message disappears before pulling away. AIRMATIC is defective. A warning tone also sounds.
X Do not drive at speeds above 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 set a higher vehicle level.
Depending on the malfunction, it may be possible to raise the
vehicle.
X Visit a qualified specialist workshop. ¨
Malfunction Malfunction The AIRMATIC function is restricted. The vehicle's handling char-
acteristics may be affected.
X Do not drive at speeds above 50 mph (80 km/h).
X Visit a qualified specialist workshop. ë
Off Off The HOLD function is deactivated. The vehicle is skidding.
A warning tone also sounds.
X Reactivate the HOLD function later (Y page 191).262
Display messagesOn-board computer and displays