MERCEDES-BENZ CLS 2014 Owners Manual

Display messagesPossible causes/consequences andSolutions
The steerabilityand brakingcharacteristics may be severely
affected. The brakingdistanceinanemergencybrakingsituation
can increase.
If ESP®is notoperational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skiddingand an accident.
XDriveoncarefully.
XVisitaqualified specialist workshop immediately.

Inoperative See
Operator's Manual
ESP®,BAS, PRE-SAFE®,the HOLD functionand hill start assist are
unavailable duetoamalfunction.
In addition, theand warning lamps light up in the
instrument cluster.
The self-diagnosisfunctionmight not be complete,for example.
ATTENTION ASSISTisdeactivated.
GWARNING
The brakesystem continues to function normally, but without the
functionslisted above.
The braking distanceinanemergency braking situation can thus
increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XCarefully driveasuitable distance, making slight steering
movements,ataspeed above 12 mph (20 km/h).
If the display message disappears,the functionsmentioned
above are available again.
If the display message continues to be displayed:
XDrive on carefully.
XVisitaqualified specialist workshop.
Display messages239
On-board computer and displays
Z

Display messagesPossible causes/consequences andSolutions


Inoperative See
Operator'sManual
EBD(electronic brakeforcedistribution), ABS, ESP®,BAS,PRE-
SAFE®,theHOLD function and hill start assist are unavailable due
toamalfunction.
BASPLUSand PRE-SAFE®Brake may also havefailed.
In addition,the, andwarninglampslightupin
the instrument cluster andawarning tonesounds.
GWARNING
The brake system continues to function normally, but without the
functionslisted above. The frontand rearwheels could therefore
lock if you brake hard, for example.
The steerability and braking characteristics may be severely
affected. The braking distance in an emergency braking situation
can increase.
If ESP®is not operational, ESP®is unable to stabilize the vehicle.
There is an increased risk of skidding and an accident.
XDrive on carefully.
XVisitaqualified specialist workshop immediately.
(USA
only)
(Canada
only)
Release Parking
Brake
You are driving with the parking brake applied.Awarning tone also
sounds.
XRelease theparking brake.
(USA
only)
(Canada
only)
Check Brake Fluid
Level
Thereisnot enough brake fluid in the brake fluid reservoir.
In addition, the(USA only)/
(Canada only) warning
lamp lights up in the instrument cluster andawarning tone
sounds.
GWARNING
The braking effect maybeimpaired.
There isariskofanaccident.
XPull overand stop the vehiclesafelyassoonaspossible,paying
attention to road and traffic conditions. Do not continue driving
under any circumstances.
XSecure the vehicle against rolling away(Ypage 167).
XConsultaqualified specialist workshop.
XDo not add brake fluid. This does not correct the malfunction.
240Display messages
On-board computer and displays

Display messagesPossible causes/consequences andSolutions

Check Brake Pad
Wear
The brakepads/liningshavereached their wear limit.
XVisitaqualified specialist workshop.

mbrace Inoperative
Oneormoremain features of thembrace system are
malfunctioning.
XHavethembrace system checkedimmediately ataqualified
specialist workshop.
PRE-SAFE
Inoperative See
Operator'sManual
ImportantfunctionsofPRE-SAFE®have failed.All other occupant
safetysystems, e.g. air bags, remain available.
XVisitaqualified specialist workshop immediately.
PRE-SAFE
Functions
CurrentlyLimited
See Operator's
Manual
PRE-SAFE®Brake is temporarily inoperative.
Possible causes are:
Rfunction is impaired due to heavy rain or snow.
Rthe sensors in the radiator grill and the bumper are dirty.
Rthe radar sensor system is temporarily inoperative, e.g. due to
electromagnetic radiation emitted by nearby TV or radio
stationsorother sources of electromagnetic radiation.
RAMG vehicles: ESP®is deactivated.
Rthe system is outside the operating temperature range.
Rthe on-board voltage is too low.
When the causes stated above no longer apply, the display
message disappears.
PRE-SAFE®Brake is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible,paying
attention to road and traffic conditions.
XSecure the vehicle against rollingaway (Ypage 167).
XClean the sensors in the radiator grill and the bumper
(Ypage 315).
XRestartthe engine.
XAMG vehicles: reactivate ESP®(Ypage 70).
PRE-SAFE
Functions Limited
See Operator's
Manual
PRE-SAFE®Brake is inoperative due toamalfunction. BAS PLUS
or the distance warning signal may also have failed.
XVisitaqualified specialist workshop.
Display messages241
On-board computer and displays
Z

Display messagesPossible causes/consequences andSolutions

SRS Malfunction
ServiceRequired
There isamalfunction in theSRS (Supplemental Restraint
System). Thewarninglamp also lights up in theinstrument
cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be
triggered unintentionally or, in theevent of an accident, may not
be triggered.
There is an increasedriskofinjury.
XVisitaqualified specialist workshop.
For further information about SRS, see (Ypage 41).

Front Left
Malfunction
ServiceRequired
orFront Right
Malfunction
ServiceRequired
SRS has malfunctioned at the frontonthe left or right.The
warning lamp also lights up in the instrument cluster.
GWARNING
The air bags or EmergencyTensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
XVisitaqualified specialist workshop.

Rear Left
Malfunction
ServiceRequired
orRear Right
Malfunction
ServiceRequired
GWARNING
The air bags or EmergencyTensioning Devices may either be
triggered unintentionally or, in the event of an accident, may not
be triggered.
There is an increased risk of injury.
SRS has malfunctioned at the rear on the left or right.The
warning lamp also lights up in the instrument cluster.
XVisitaqualified specialist workshop.

Left Side Curtain
AirbagMalfunction
ServiceRequired
orRight Side
CurtainAirbag
malfunction
ServiceRequired
There isamalfunction in the left-hand or right-handwindow
curtain air bag.
Thewarning lamp also lights up in the instrument cluster.
GWARNING
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.
XVisitaqualified specialist workshop.
242Display messages
On-boar dc omputer and displays

Display messagesPossible causes/consequences andSolutions
Front Passenger
Airbag Disabled
See Operator's
Manual
The front-passenger air bag and front-passenger knee bag are
deactivated during thejourney, although:
Ran adult
or
Raperson larger thanacertainsizeisoccupyingthefront-
passenger seat
If additional forces are applied to theseat,thesystem may
interpret theoccupant's weight as lowerthan it actually is.
GWARNING
The front-passenger front air bag and front passenger knee bag
may not be triggered in the event of an accident.
There is an increased risk of injury.
XPull over and stop the vehicle safely as soon as possible, paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 167).
XSwitch the ignition off.
XHave the occupant get out of the vehicle.
XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
XObserve the PASSENGER AIR BAG OFF indicator lamp in the
center console and the multifunction displayand check the
following:
Seat unoccupied and ignition switched on:
Rthe PASSENGER AIR BAG OFF indicator lamp must light up and
remain lit. If the indicator lamp is on, OCS has disabled the front-
passenger air bag and front-passenger knee bag (Ypage 47).
RtheFront Passenger Airbag Enabled See Operator's
ManualorFront Passenger Airbag Disabled See
Operator's Manualdisplaymessages must not be shown in
the multifunction display.
XWait foraperiod of at least 60 seconds until the necessary
system checkshave been completed.
XMake sure that the displaymessages do not appearinthe
multifunction display.
If these conditionsare 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 conditionsare not fulfilled,the system is not operating
correctly.
Display messages243
On-board computer and displays
Z

Display messagesPossible causes/consequences andSolutions
XVisitaqualified specialist workshop immediately.
Forfurther information about theOccupantClassification System,
see (Ypage 47).
FrontPassenger
Airbag Enabled
See Operator's
Manual
The front-passenger air bag and front-passenger knee bag are
enabled duringthe journey, even though:
Rachild,asmall adult or an object weighingless than the
system's weight threshold is located on the front-passenger
seat
or
Rthe front-passenger seat is unoccupied
The system may detect objectsorforces applying additional
weight on the seat.
GWARNING
The front-passenger front air bag and front passenger knee bag
may be triggeredunintentionally.
There is an increased risk of injury.
XPull over and stop the vehicle safely as soon as possible,paying
attention to road and traffic conditions.
XSecure the vehicle against rollingaway (Ypage 167).
XSwitch the ignition off.
XOpen the front-passenger door.
XRemove the child and the child restraint system fromthe front-
passenger seat.
XMake sure that there are no objectsonthe 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.
XKeep the seat unoccupied, close the front-passenger door and
switch on the ignition.
XObserve the PASSENGER AIR BAG OFF indicator lamp in the
center console and the multifunction displayand check the
following:
Seat unoccupied and ignition switched on:
Rthe PASSENGER AIR BAG OFF indicator lamp must light up and
remain lit. If the indicator lamp is on, OCS (Occupant
Classification System) has disabled the front-passenger air bag
and front-passenger knee bag (Ypage 47).
RtheFront Passenger Airbag Enabled See Operator's
ManualorFront Passenger Airbag Disabled See
244Display messages
On-board computer and displays

Display messagesPossible causes/consequences andSolutions
Operator'sManualdisplay messagesmustnot be shown in
the multifunction display.
XWait foraperiod of at least 60 seconds until the necessary
system checkshave been completed.
XMake 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 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.
XVisitaqualified specialist workshop immediately.
For further information about the Occupant Classification System,
see (Ypage 47).
Lights
iDisplay messages about LEDs:
This display message will only appear if all LEDshave failed.
Display messagesPossible causes/consequences andSolutions

Check Left
Cornering Lightor
Check Right
Cornering Light
The left or right-hand cornering light is defective.
XVisitaqualified specialist workshop.

Check Left Low
BeamorCheck
Right Low Beam
The left or right-hand low-beam headlamp is defective.
XVisitaqualified specialist workshop.

Check Rear Left
Turn Signalor
Check Rear Right
Turn Signal
The rear left-hand or rear right-hand turn signal is defective.
XVisitaqualified specialist workshop.
Display messages245
On-board computer and displays
Z

Display messagesPossible causes/consequences andSolutions

Check Front Left
TurnSignalor
Check Front Right
TurnSignal
The frontleft-handorfrontright-hand turnsignal is defective.
XVisitaqualified specialist workshop.

Check LeftMirror
TurnSignalor
CheckRightMirror
TurnSignal
The turnsignal in theleft-handorright-hand exteriormirror is
defective.
XVisitaqualified specialist workshop.

CheckCenterBrake
Lamp
The high-mountedbrakelamp is faulty.
XVisitaqualified specialist workshop.

Check LeftTail
and Brake Lampsor
Check Right Tail
and Brake Lamps
The leftorright-handtail lamp/brakelamp is defective.
XVisitaqualified specialist workshop.

CheckLeft High
BeamorCheck
RightHigh Beam
The left or right-handhigh beam is defective.
XVisitaqualified specialist workshop.

Rear Fog Lamp
The rear fog lamp is defective.
XVisitaqualified specialist workshop.

CheckFrontLeft
Parking Lampor
CheckFrontRight
Parking Lamp
The front left or front right parking or standinglamp is defective.
XVisitaqualified specialist workshop.

CheckLeftReverse
LamporCheck
RightReverse Lamp
The left or right-handbackup lamp is defective.
XCheck whether you are permitted to change the bulb yourself.
or
XVisitaqualified specialist workshop.
246Display messages
On-board computer and displays

Display messagesPossible causes/consequences andSolutions

Check Front Left
SidemarkerLampor
Check Front Right
SidemarkerLamp
The leftorright frontside markerlamp is defective.
XVisitaqualified specialist workshop.

Check RearLeft
SidemarkerLampor
Check RearRight
SidemarkerLamp
The rear leftorright side marker lamp is defective.
XVisitaqualified specialist workshop.

CheckLeftDaytime
Running Lightor
CheckRight
Daytime Running
Light
The left-handorright-handdaytime running lamp is faulty.
XVisitaqualified specialist workshop.

Active Light
System Inoperative
The active light function is defective.
XVisitaqualified specialist workshop.

Malfunction See
Operator's Manual
The exterior lighting is defective.
XVisitaqualified specialist workshop.

AutoLampFunction
Inoperative
The light sensor is defective.
XVisitaqualified specialist workshop.

Switch Off Lights
The lightsare still switched on when you leave the vehicle. A
warningtonealso sounds.
XTurn the light switchto\r.
Display messages247
On-board computer and displays
Z

Display messagesPossible causes/consequences andSolutions
Adaptive Highbeam
Assist Inoperative
Adaptive Highbeam Assistisfaulty.
XVisitaqualified specialist workshop.
Adaptive Highbeam
Assist Currently
Unavailable See
Operator's Manual
Adaptive Highbeam Assist is deactivated and temporarily
inoperative. Possible causes are:
Rthe windshieldinthe camera's field of vision is dirty.
Rvisibility is impaired due to heavy rain, snow or fog.
XCleanthe windshield.
If the system detectsthat the camera is fully operational again,
theAdaptive Highbeam Assist Now Availablemessage is
displayed.
Adaptive Highbeam Assist is operational again.
Engine
Display messagesPossible causes/consequencesandSolutions

Check Coolant
Level See
Operator'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.
XAdd coolant, observing the warning notes before doing so
(Ypage 308).
XIf coolant needs to be added more often than usual, have the
engine coolant system checked ataqualified specialist
workshop.
The fan motor is faulty.
XAt coolant temperatures below 248‡(120 †), drive to the
nearest qualified specialist workshop.
XAvoid subjecting the engine to heavy loads, e.g. driving in
mountainous terrain, and stop-and-go traffic.
248Display messages
On-board computer and displays