2014 MERCEDES-BENZ CL-Class light
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Display messages Possible causes/consequences and
M Solutions
$(USA
only)
J(Canada
only)
Service See Operator's Manual There is a malfunction in the system. The brak
esystem continues
to operate normally.
X Drive on carefully.
X Visit a qualified specialist workshop. $(USA
only)
J(Canada
only)
Check Brake Fluid Level There is no
tenough 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.
G WARNING
The braking effect may be impaired.
There is a ris kofanaccident.
X Pull ove rand stop the vehicle safely as soo nas possible, paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
X Secure the vehicle against rolling away (Y page 289).
X Consult a qualified specialist workshop.
X Do not add brake fluid. This does not correct the malfunction. Display messages Possible causes/consequences and
M Solutions
G
Tele Aid
Inoperative 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 aqualified
specialist workshop.
X Canada only: have the TELEAI Dsystem checked at a qualified
specialist workshop. PRE-SAFE
Inoperative See
Operator's Manual Important function
sof PRE-SAFE ®
have failed .All other occupant
safety systems, e.g. air bags, remain available.
X Visit a qualified specialist workshop immediately. Display messages
361On-board computer and displays Z
Page 364 of 494
Display messages Possible causes/consequences and
M Solutions
PRE-SAFE
Function Currently
Limited See
Operator's Manual PRE-SAFE
®
Brake is temporarily inoperative. Possible causes are:
R the DISTRONIC PLUS cover in the radiator trim is dirty
R function is impaired due to heavy rain or snow.
R the sensors in the bumpers are dirty.
R the rada rsensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stations or other sources of electromagnetic radiation.
R the system is outside the operating temperature range.
R the on-board voltage is too low.
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 DISTRONIC PLUS cover in the radiator trim
(Y page 431).
X Clean the bumpers (Y page 431).
X Restart the engine.
If the system detects that the sensors are fully operational, the
display message disappears.
PRE-SAFE ®
Brake is operational again. PRE-SAFE
Function Limited
See Operator's
Manual PRE-SAFE
®
Brak eisd efective. BAS PLUS or the distanc ewarning
signal may also have failed.
X Visi taqualified specialist workshop. 6
SRS Malfunction
Service Required There is a malfunction in the SRS (Supplemental Restraint
System). The
6warning lamp also lights up in the instrument
cluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. 362
Display messagesOn-board computer and displays
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Display messages Possible causes/consequences and
M Solutions
6
Front Left SRS
Malfunction
Service Required
or
Front Right SRS Malfunction
Service Required SRS has malfunctioned at the front on the left or right. The
6
warning lamp also lights up in the instrumen tcluster.
G WARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. 6
Rear Left SRS
Malfunction
Service Required
or
Rear Right SRS Malfunction
Service Required SRS has malfunctione
dat the rear on the left or right. The 6
warning lamp also lights up in the instrument cluster.
G WARNING
The ai rbags or Emergency Tensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased ris kofinjury.
X Visi taqualified specialist workshop. 6
Left Side Curtain
Airbag Malfunction
Service Required
or
Right Side Curtain Airbag
Malfunction
Service Required There is a malfunction in the left-hand or right-hand window
curtain air bag.
The 6 warning lamp also lights up in the instrument cluster.
G WARNING
The left or right window curtain air bag may either be triggered
unintentionally or, in the event of an accident, may not be
triggered.
There is an increased risk of injury.
X Visit a qualified specialist workshop. Display messages
363On-board computer and displays Z
Page 366 of 494
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
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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
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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 372 of 494
Display messages Possible causes/consequences and
M Solutions
b
Check
Left Daytime
Running
Light or
Check Right Daytime
Running Light The lef
torright-hand daytime running lamp is defective.
X Check whether you are permitted to change the bulb yourself
(Y page 256).
or
X Visit a qualified specialist workshop. b
Active Headlamps
Inoperative The active light function is defective.
X
Visit a qualified specialist workshop. b
Malfunction See
Oper. Manual The exterior lighting is defective.
X
Visit a qualified specialist workshop. b
AUTO
Lamp Function
Inoperative 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 349).
X Switch the lights on and off using the light switch. b
Please 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 $orc.
or
X If the rear fog lamp is switched on: press the light switch in to
the stop. Adaptive High-beam
Assist Inoperative Adaptive Highbeam Assist is faulty.
X
Visit a qualified specialist workshop. 370
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