2014 MERCEDES-BENZ CLS warning light

Rsteer slightly in the opposite direction
Ruseaturn signal
Rclearly brake or accelerate
Alane-correcting brakeapplicationis
interrupted automatically if:
Radrivingsafetysystem intervenes,e.g.
ESP®,PRE-SAFE®Brake or ActiveBlind
Spot Assist.
Rlane markings can no longer be recognized.
Switching on Active Lane Keeping Assist
XSwitch on ActiveLane KeepingAssist using
the on-board computer;todoso, select
StandardorAdaptive(Ypage 229).
If you drive at speeds above 40 mph
(60 km/h) and lane markings are detected,
the lines in the assistancegraphicsdisplay
(Ypage 227)are shown in green.Lane
KeepingAssist is ready for use.
IfStandardis selected, no warning
vibration occurs if:
Ryou have switched on the turnsignals.In
thisevent, the warnings aresuppressed
foracertainperiodoftime.
Radriving safety systemintervenes, such
as ABS, BAS or ESP®.
IfAdaptiveis selected, no warning
vibrationoccurs if:
Ryouhaveswitched on the turnsignals.In
thisevent, the warnings aresuppressed
foracertainperiodoftime.
Radriving safety systemintervenes, e.g.
ABS, BAS or ESP®.
Ryouaccelerate hard, e.g.kickdown.
Ryou brakehard.
Ryou steer actively, e.g. swervetoavoid
an obstacle or change lanes quickly.
Ryou cut the corner onasharp bend.
In order that you are warnedonly when
necessary and in good timeifyou cross the
lane marking, the system recognizes certain
conditions and warns you accordingly.
The warning vibration occurs earlier if:
Ryou approach the outer lane marking on a
bend.
Rthe road has very wide lanes, e.g. a
highway.
Rthe system recognizes solid lane markings.
The warning vibration occurs later if:
Rthe road has narrow lanes.
Ryou cut the corner onabend.
216Driving systems
Driving and parking

GWARNING
If you deactivate ESP®,ESP®no longer
stabilizes the vehicle. There is an increased
risk of skidding and an accident.
Only deactivate ESP®in the situations
described in the following.
It may be best to deactivate ESP®in the
following situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
Activating/deactivating ESP®on AMG
vehicles (Ypage70).
For further information about ESP®,see
(Ypage68).
XStart the engine.
XPress the\norbutton on the
steering wheeltoselect theDriveAssist
menu.
XPress theorbutton to select
ESP.
XPress thebutton.
The current selection is displayed.
XTo activate/deactivate:press the
button again.
ESP®is deactivated if the warning lamp
in the instrument cluster lights up
continuously when the engine is running.
If thewarning lamp and the
warning lamp are lit continuously,ESP®is not
available due toamalfunction.
Observe the information on warning lamps
(Ypage269).
Observe the information on display messages
(Ypage238).
Activating/deactivating PRE-SAFE®
Brake
PRE-SAFE®Brake is only available in vehicles
with DISTRONIC PLUS.
XPress\noron the steering wheel
to select theDriveAssistmenu.
XPress theorbutton to select
PRE-SAFEBrake.
XPress thebutton.
The current selection is displayed.
XTo activate/deactivate:press the
button again.
When PRE-SAFE®Brake is deactivated, the
assistance graphic showsthe
symbol in
the multifunction display.
For more information on PRE-SAFE®Brake,
see (Ypage72).
Activating/deactivating ATTENTION
ASSIST
XPress\noron the steering wheel
to select theDriveAssistmenu.
XPressorto selectAttention
Assist.
XPress thebutton.
The current selection is displayed.
XTo activate/deactivate:press the
button again.
When ATTENTION ASSIST is deactivated, the

symbol and OFF appear in the
multifunction display in the assistance
display when the engine is running.
For further information about ATTENTION
ASSIST, see (Ypage203).
Activating/deactivating Blind Spot
Assist
XPress\noron the steering wheel
to select theDriveAssistmenu.
XPress theorbutton to select
Blind Spot Asst.
228Menus and submenus
On-board computer and displays

XPress thebutton.
The currentselection is displayed.
XTo activate/deactivate:press the
button again.
If theBlind Spot Assist Sensors
DeactivatedorAct. Blind Spot Asst.
Sensors Deactivatedmessage appears,
the radar sensor system is deactivated.
XSwitchonthe radar sensor system
(Ypage 232).
For further information about Blind Spot
Assist,see (Ypage 207).
For further information about Active Blind
Spot Assist,see (Ypage 211).
Activating/deactivating Lane Keeping
Assist
XPress\noron the steering wheel
to select theDriveAssistmenu.
XPress theorbutton to select
Lane Keep. Asst.
XPress thebutton.
The currentselection is displayed.
XPressto confirm.
XPress theorbutton to setOff,
StandardorAdaptive.
XPress thebutton to save the setting.
For further information about Lane Keeping
Assist,see (Ypage 209).
For further information about Active Lane
Keeping Assist,see (Ypage 214).
Maintenance menu
In theServ.menu, you have the following
options:
RCalling up display messages in message
memory (Ypage 237)
RRestarting the tire pressure loss warning
system (Ypage 342)
RCheckingthe tire pressure electronically
(Ypage 342)
RCalling up the servicedue date
(Ypage 310)
Settings menu
Introduction
In theSett.menu, you have the following
options:
RChanging the instrument cluster settings
(Ypage 229)
RChanging the light settings (Ypage 230)
RChanging the vehicle settings
(Ypage 232)
RChanging the convenience settings
(Ypage 233)
RRestoringthe factory settings
(Ypage 234)
Instrument cluster
Selecting the unit of measurement for
distance
TheDisplay Unit Speed-/Odometer:
function allows you to choose whether
certain displays appear in kilometers or miles
in the multifunction display.
Menus and submenus229
On-boar dc omputer and displays
Z

Safety systems
Display messagesPossible causes/consequences andSolutions

Currently
Unavailable See
Operator's Manual
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, andwarning lamps light up in
the instrumentcluster.
ATTENTIONASSIST is deactivated.
Possible causes are:
Rself-diagnosis is not yet complete.
Rthe on-board voltage may be insufficient.
GWARNING
The brake system continues to function normally, but without the
functions listed above. The wheels 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.
XCarefully driveasuitable distance, making slight steering
movements, ataspeed above 12 mph (20 km/h).
If the displaymessage disappears, the functions mentioned
above are available again.
If the displaymessage continues to be displayed:
XDrive on carefully.
XVisitaqualified specialist workshop.

Inoperative See
Operator's Manual
ABS,ESP®,BAS,PRE-SAFE®,the HOLD function and hill start
assist are unavailable due toamalfunction.
The(USA only)/
(Canada only),, and
warning lamps in the instrumentcluster also light up.
ATTENTION ASSISTisdeactivated.
GWARNING
The brakesystem continues to function normally, but without the
functionslisted above. The wheels could therefore lock if you
brakehard, for example.
238Display messages
On-board computer and displays

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

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