2014 MERCEDES-BENZ CLS sensor

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

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

VehicleRising
Your vehicleisadjustingtothelevel you haveselected.

VehicleRising
Please Wait
The vehiclelevel is toolow when thevehicleisstationary. A
warningtonealso sounds.
XDo notpull away.
The vehiclelevelisset when thedisplay message disappears.

StopVehicle
VehicleToo Low
You have pulled away while thevehiclelevelisstill toolow.
AIRMATIC setsthevehicletotheselected levelafterashort
period.
XPull overand stop the vehiclesafelyassoonaspossible,paying
attention to road and traffic conditions.
XSecure the vehicle against rolling away(Ypage 167).
XWait until the displaymessage disappears before pulling away.
AIRMATIC is defective.Awarning tone also sounds.
XDo notdriveatspeeds above50mph (80 km/h).
XMakeonlyslightsteering movements. Otherwise, the front
fender or the tires could be damagedifthe steering movement
is too large.
XListenfor scraping sounds.
XPull over and stop the vehicle safely, paying attention to road
and traffic conditions, and selectahigher vehicle level.
Depending on the malfunction, it may be possible to raise the
vehicle.
XVisitaqualified specialist workshop.

Malfunction
The AIRMATICfunction is restricted. The vehicle's handling
characteristics may be affected.
XDo not drive at speeds above 50 mph (80 km/h).
XVisitaqualified specialist workshop.

Off
The HOLD function is deactivated. The vehicle is skidding.
Awarning tone also sounds.
XReactivatetheHOLD function later(Ypage 186).
Radar Sensors
Deactivated See
Operator'sManual
The radar sensor system is deactivated.
XSwitch on theradar sensor system (Ypage 232).
252Display messages
On-boar dc omputer and displays

Display messagesPossible causes/consequences andSolutions
Blind SpotAssist
Currently
Unavailable See
Operator'sManual
orActive Blind
SpotAssist
Currently
Unavailable See
Operator'sManual
Blind Spot AssistorActiveBlind Spot Assististemporarily
inoperative. Possiblecauses are:
Rthesensorsare dirty.
Rfunction is impaireddue to heavyrain or snow.
Rtheradarsensor system is outside the operatingtemperature
range.
Rthe 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 yellowindicator lamps also light up in the exterior
mirrors.
When the causes stated above no longer apply, the display
message disappears.
Blind Spot Assist or Active Blind Spot Assist 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 rolling away (Ypage 167).
XClean the sensors(Ypage 315).
XRestart the engine.
Blind Spot Assist
Inoperativeor
Active Blind Spot
Assist Inoperative
Blind Spot Assist or Active Blind Spot Assist is defective.
The yellowindicator lamps also light up in the exterior
mirrors.
XVisitaqualified specialist workshop.
Park Assist
Canceled
The driver's door is open and the driver's seat belt has not been
fastened.
XRepeat the parkingprocess with the seat belt fastened and the
driver's door closed.
You have inadvertently touched the multifunction steering wheel
while steering intervention was active.
XWhile steering intervention is active, make sure that the
multifunction steering wheel is not touched unintentionally.
The vehicle has started to skid and ESP®has intervened.
XUse Active ParkingAssist again later (Ypage 196).
254Display messages
On-boar dc omputer and displays

Display messagesPossible causes/consequences andSolutions
DISTRONIC PLUS
Currently
Unavailable See
Operator'sManual
DISTRONIC PLUSistemporarily 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
stations or other sources of electromagnetic radiation.
Rthe system is outside the operating temperature range.
Rthe on-board voltage is too low.
Awarning tone also sounds.
When thecauses statedabovenolonger apply, thedisplay
message disappears.
DISTRONICisoperational again.
If thedisplay message does notdisappear:
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.
DISTRONIC PLUS
Inoperative
DISTRONIC PLUS is defective.
The following may have also failed:
RBAS PLUS (Brake Assist System PLUS)
RPRE-SAFE®Brake
Awarning tone also sounds.
XVisitaqualified specialist workshop.
DISTRONIC PLUS
Suspended
You have depressed the accelerator pedal. DISTRONIC PLUS is no
longer controlling the speed of the vehicle.
XRemove your foot from the accelerator pedal.
DISTRONIC PLUS
---mph
An activation condition for DISTRONIC PLUS is not fulfilled.
XCheck the activation conditionsfor DISTRONIC PLUS
(Ypage 177).
256Display messages
On-boar dc omputer and displays

Display messagesPossible causes/consequences andSolutions
TirePress.Monitor
Currently
Unavailable
Due toasource of radiointerference,nosignals can be received
from the wheelsensors.The tire pressure monitor is temporarily
malfunctioning.
XDrive on.
The tire pressure monitor restarts automatically as soon as the
problem has been solved.
TirePress.
Sensor(s) Missing
There is no signal from the tire pressure sensor of one or several
wheels. The pressure of the affected tire is not displayed in the
multifunction display.
XHave the faulty tire pressure sensor replaced ataqualified
specialist workshop.
Tire Pressure
Monitor
Inoperative No
Wheel Sensors
The wheels mounted do not haveasuitable tire pressure sensor.
The tire pressure monitor is deactivated.
XMount wheels with suitable tire pressure sensors.
The tire pressure monitor is activated automatically after driving
forafew minutes.
TirePress.Monitor
Inoperative
The tire pressure monitor is faulty.
XVisitaqualified specialist workshop.
Vehicle
Display messagesPossible causes/consequencesandSolutions
Shiftto'P'or'N'
To Start Engine
You have attempted to start the engine with the transmission in
positionRorD.
XShift the transmission to positionPorN.
Auxiliary Battery
Malfunction
The auxiliary battery for the automatic transmission is no longer
being charged.
XVisitaqualified specialist workshop.
Apply Brake
to Shift from 'P'
You have attempted to move the transmission selector lever to
positionD,RorNwithout depressing the brake pedal.
XDepress the brake pedal.
Risk of Rolling
Away
Vehicle Not in 'P'
The driver's door is open and the transmission is in positionR,N
orD.
Awarning tone also sounds.
XShift thetransmission to positionP.
XSecure thevehicle against rolling away (Ypage 167).
260Display messages
On-boar dc omputer and displays

Engine
ProblemPossible causes/consequences andSolutions
\n
The yellow Check
Enginewarning lamp
lightsupwhile the
engineisrunning.
Theremay beamalfunction, for example:
Rin theenginemanagement
Rin thefuel injection system
Rin theexhaust system
Rin theignition system
Rin thefuel system
The emission limit values may be exceeded and theenginemay
be runninginemergencymode.
XHavethevehicle checked as soon as possible ataqualified
specialist workshop.
iIn somestates, you must immediately visitaqualified
specialist workshopassoon as theyellow CheckEngine warning
lamp lights up.This is due to the legal requirements in effect in
these states. If in doubt, check whether such legal regulations
apply in the state in which you are currently driving.

The yellow reserve fuel
warning lamp lights up
while the engine is
running.
The fuel level has dropped into the reserve range.
XRefuel at the nearest gas station.

The yellow reserve fuel
warning lamp flashes
while the vehicle is in
motion.
In addition, the\n
Check Enginewarning
lamp may light up.
The fuel system pressure is too low. The fuel filler cap is not closed
correctly or the fuel system is leaking.
XCheck that the fuel filler cap is correctly closed.
XIf the fuel filler cap is not correctly closed:close the fuel filler
cap.
XIf the fuel filler cap is closed:visitaqualified specialist
workshop.

The red coolant
warning lamp lights up
while the engine is
running and the coolant
temperature gauge is
at the start of the scale.
The temperature sensor for the coolant temperature gauge is
defective.
The coolant temperature is no longer being monitored. There is a
risk of engine damage if the coolant temperature is too high.
XPull over and stop the vehicle safely and switch off the engine,
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.
Indicator and warning lampsinthe instrument cluster273
On-board computer and displays
Z

XClean theplastic lenses of themirror turn
signals in theexterior mirror housingusing
awet sponge and mild cleaning agent, e.g.
Mercedes-Benz car shampoo or cleaning
cloths.
Cleaning the sensors
!If you clean the sensors withapower
washer, make sure that you keep a
distance of at least 11.8in(30 cm) between
the vehicle and the power washer nozzle.
Information about the correct distance is
available from the equipment
manufacturer.
XClean sensorsof the driving systems
with water, car shampoo andasoft cloth.
Cleaning the rear viewcamera
!Do not cleanthe camera lens and the area
around the rear view camera withapower
washer.
XUse clear water andasoft cloth to clean
camera lens.
Cleaningthe exhaust pipes
!Do not clean the exhaust pipe with acid-
based cleaning agents such as sanitary
cleansers or wheel cleaners.
Impurities combined with the effectsofroad
grit and corrosive environmental factors may
cause flash rust to form on the surface. You
can restore the original shine of the exhaust
pipe by cleaning it regularly,especiallyin
winter and after washing.
XCleanthe exhaust pipe withacare product
tested and approved by Mercedes-Benz.
Interior care
Cleaningthe display
!For cleaning, do not use any of the
following:
Ralcohol-based thinner or gasoline
Rabrasive cleaning agents
Rcommercially-available household
cleaning agents
These may damage the displaysurface. Do
not put pressure on the displaysurface
when cleaning. This could lead to
irreparable damage to the display.
Care315
Maintenance and care
Z