2014 MERCEDES-BENZ CL-Class air condition
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Display messages Possible causes/consequences and
M Solutions
Front Passenger
Airbag Disabled
See Operator's
Manual The front-passenger air bag is disabled during the journey, even
though:
R
an adult
or
R 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 lowe rthan it actually is.
X Pull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
X Apply the parking brake.
X Switch the ignition off.
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 PASSENGER AIR BAG OFF indicator lamp
(Y page 50) and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the PASSENGER AIR BAG OFF indicator lamp must light up and
remain lit. If the indicator lamp is on, OCS (Y page 50) has
deactivated the front-passenger air bag.
R The Front Passenger Airbag Enabled See Oper. Manual or
Front Passenger Airbag Disabled See Oper.
Manual display messages must not appearint
he multifunction
display.
X Wait for a period of at least 60 seconds until the necessary
system checks have been completed.
X Make sure that the display messages do not appearint he
multifunction 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
correctly.
X Visit a qualified specialist workshop immediately. 364
Display messagesOn-board computer and displays
Page 368 of 494
Display messages Possible causes/consequences and
M Solutions
Front Passenger
Airbag Enabled
See Operator's
Manual The front-passenger air bag is enabled during the journey, even
though:
R
a child, a small adult or an objec tweighing less than the
system's weight threshold is located on the front-passenger
seat
or
R the front-passenger seat is unoccupied
The system may detec tobjects 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 Apply the parking brake.
X Switch the ignition off.
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 detec tthe 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 PASSENGER AIR BAG OFF indicator lamp
(Y page 50) and the multifunction display and check the following:
Seat unoccupied and ignition switched on:
R the PASSENGER AIR BAG OFF indicator lamp must light up and
remain lit. If the indicator lamp is on, OCS (Y page 50) has
deactivated the front-passenger air bag.
R The Front Passenger Airbag Enabled See Operator's Manual or
Front Passenger Airbag Disabled See Operator's Manual display messages must not appearint
he
multifunction display.
X Wait for a period of at least 60 seconds until the necessary
system checks have been completed.
X Make sure that the display messages do not appearint he
multifunction display.
If these conditions are fulfilled, the front-passenger seat can be
occupied again. Whether the PASSENGER AIR BAG OFF indicator 366
Display messagesOn-board computer and displays
Page 369 of 494
Display messages Possible causes/consequences and
M Solutions
lamp remains lit or goes out depends on how OCS classifies the
occupant.
If the conditions are no
tfulfilled, the system is no toperating
correctly.
X Visit a qualified specialist workshop immediately. G
WARNING
If the 42 indicator lamp remains off even after performing the above corrective
steps, do not have any children twelve years old and under and other small individuals use the
front-passenger seat until the system has been repaired. Lights
i Display messages about LEDs:
This display message will only appear if all LEDs have failed. Display messages Possible causes/consequences and
M Solutions
b
Check Left
Cornering
Light or
Check Right Cornering
Light The left or right-hand cornering light is defective.
X
Check whether you are permitted to change the bulb yourself
(Y page 256).
or
X Visit a qualified specialist workshop. b
Check Left Low
Beam or
Check Right
Low Beam The left or right-hand low-beam headlamp is defective.
X
Check whether you are permitted to change the bulb yourself
(Y page 256).
or
X Visit a qualified specialist workshop. b
Check Rear Left
Turn
Signal or
Check Rear Right 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 256).
or
X Visit a qualified specialist workshop. Display messages
367On-board computer and displays Z
Page 374 of 494
Display messages Possible causes/consequences and
M Solutions
? The fan motor is faulty.
X
At coolan ttemperatures 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. ?
Coolant Low Stop
Vehicle Turn
Engine Off The coolant is too hot.
Aw
arning tone also sounds.
G WARNING
Do no tdrive when youre ngine is overheated. Thi scan cause some
fluids which may have leaked into the engine compartmen tto
catch fire.
Stea mfrom 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 289).
X Leave the vehicle and keep a safe distance from the vehicle 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 under 248 ‡ (120 †).
Otherwise, 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 †). 372
Display messagesOn-board computer and displays
Page 377 of 494
Driving systems
Display messages Possible causes/consequences and
M Solutions
À
Attention Assist:
Drowsiness
Detected Based on specific criteria, ATTENTION ASSIST has determined that
the driver is tired or paying less attention
.Awarning 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
Inoperative ATTENTION ASSIST has failed.
X Visi taqualified specialist workshop. Á
Night View Assist
Inoperative Night View Assist Plus is defective.
X Visit a qualified specialist workshop. Á
Night View Assist
Currently
Unavailable 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 432).
X Adjust the air distribution of the automatic air conditioning
upwards. Á
Night View Assist
Lights Must Be Set
To AUTO or ON Ac
ondition for activating Night View Assist Plus has not been
fulfilled.
X Turn the light switch to corL. Á
Night View Assist
Not In Reverse Gear Ac
ondition for activating Night View Assist Plus has not been
fulfilled.
X Shift the transmission to P,Nor D. Á
Night View Assist
Lights ON or AUTO,
Not in R Gear Ac
ondition for activating Night View Assist Plus has not been
fulfilled.
X Turn the light switch to corL.
X Shift the transmission to P,Nor D. Display messages
375On-board computer and displays Z
Page 378 of 494
Display messages Possible causes/consequences and
M Solutions
Á
Night View Assist
Only When It Is
Dark You have attempted to activate Night View Assis
tPlus in the
daytime.
Night View Assist Plus can only be activated when it is dark. ¨
Vehicle Rising Your vehicle is adjusting to the level you have selected.
¨
Vehicle Rising
Please Wait Briefly 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. ¨
STOP Car 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 289).
X Wait until the display message disappears before pulling away. AIRMATIC is defective.
Awarning tone also sounds.
X Do not drive at speeds above 50 mph (80 km/h).
X Make only sligh tsteering movements. Otherwise, the front
fender or the tires could be damaged if the steering movement
is too large.
X Liste nfor 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. ¨
Malfunction The AIRMATIC function is restricted. The vehicle's handling
characteristics may be affected.
X
Do not drive at speeds above 50 mph (80 km/h).
X Visit a qualified specialist workshop. 376
Display messagesOn-board computer and displays
Page 380 of 494
Display messages Possible causes/consequences and
M Solutions
Radar Sensors
Deactivated See
Oper. Manual The rada
rsensor system is deactivated.
X Switch on the radar sensor system (Y page 350).Active Lane
Keeping Assist
Currently
Unavailable See
Oper. Manual Active Lane Keeping Assist is deactivated and temporarily
inoperative. 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.
R there are no lane markings for a longer period.
R the lane markings are worn, dark or covered, e.g. by dirt or snow.
If the display message does not disappear:
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 289).
X Clean the windshield.
If the system detects that the camera is fully operational, the
display message disappears.
Active Lane Keeping Assist is operational again. Active Lane
Keeping Assist
Inoperative Active Lane Keeping Assist is defective.
X
Visit a qualified specialist workshop. 378
Display messagesOn-board computer and displays
Page 381 of 494
Display messages Possible causes/consequences and
M Solutions
Active Blind Spot
Assist
Currently
Unavailable See
Operator's Manual Active Blind Spot Assis
tis temporarily inoperative. Possible
causes are:
R the sensors are dirty.
R function is impaired due to heavy rain or snow.
R the radar sensor system is outside the operating temperature
range.
R the 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 9indicator lamps also light up in the exterior
mirrors.
If the display message does not disappear:
If the display message does not disappear:
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 289).
X Cleant he sensors (Y page 431).
X Restart the engine.
If the system detects that the sensors are fully operational, the
display message disappears.
Active Blind Spot Assist is operational again. Active Blind Spot
Assist
Inoperative Active Blind Spot Assist is defective.
The yellow
9indicator lamps also light up in the exterior
mirrors.
X Visit a qualified specialist workshop. Parking Guidance
Inoperative Parking Guidance is malfunctioning (Y
page 315).
X Restart the engine.
If the display message continues to be displayed:
X Visit a qualified specialist workshop. Display messages
379On-board computer and displays Z