esp MERCEDES-BENZ CLA 2019 Repair Manual

Displaying the assistance graphic
XPress theYorebutton on the steeringwheel to select theDriveAssistDriveAssistmenu.
XPresscordto selectAssist.Assist.GraphicGraphic.
XPressvto confirm.The multifunction display shows the ActiveDistance Assist DISTRONIC distance displayon the assistant display.
The assistance graphic displays the status ofand information from the following drivingsystems or driving safety systems:
RActive Distance Assist DISTRONIC(Ypage 152)
RActive Brake Assist (Ypage 62)
RATTENTION ASSIST (Ypage 173)
RLane Keeping Assist (Ypage 176)
XPressdto display the ATTENTION ASSISTassessment.
Deactivating/activating ESP®
Observe the important safety notes on ESP®
(Ypage 64).
GWARNING
If you deactivate ESP®, ESP®no longer sta-
bilizes the vehicle. There is an increased risk
of skidding and an accident.
Only deactivate ESP®in the situations descri-
bed in the following.
It may be best to deactivate ESP®in the follow-ing situations:
Rwhen using snow chains
Rin deep snow
Ron sand or gravel
Deactivating/activating ESP®in Mercedes-AMG vehicles (Ypage 66).
For further information about ESP®, see(Ypage 64).
XStart the engine.
XPress theYorebutton on the steeringwheel to select theDriveAssistDriveAssistmenu.
XPresscordto selectESPESP.
XPressvto confirm.The current selection appears.
XTo activate/deactivate:press thevbut-ton again.
ESP®is deactivated if the

RActive Distance Assist DISTRONIC
RASSYST PLUS service interval display
Switching the additional speedometer
on/off
If the additional speedometer is switched on,the speed is shown in the status bar in the mul-tifunction display instead of the outside tem-perature.
The speed displayCis an alternative to yourspeedometer.
XPress theYorebutton on the steeringwheel to select theSett.Sett.menu.
XPress thedorcbutton to select theInstrument ClusterInstrument Clustersubmenu.
XPressvto confirm.
XPress thedorcbutton to select theSpeedometer [km/h]Speedometer [km/h]orSpeedometerSpeedometer[mph][mph]function.You will see the selected setting:OnOnorOffOff.
XPress thevbutton to save the setting.
Selecting permanent display
ThePermanent Display:Permanent Display:function allows youto choose whether the multifunction displayalways shows the outside temperature or thespeed.
The speed displayCis an alternative to yourspeedometer.
XPress theYorebutton on the steeringwheel to select theSett.Sett.menu.
XPress thedorcbutton to select theInstrument ClusterInstrument Clustersubmenu.
XPressvto confirm.
XPress thedorcbutton to select thePermanent Display:Permanent Display:function.The current setting,Outside TemperatureOutside TemperatureorSpeedometer [km/h]Speedometer [km/h]/SpeedometerSpeedometer[mph][mph], appears.
XPress thevbutton to save the setting.
Lights
Switching the daytime running lamps on/
off
This function is not available in Canada.
XPress theYorebutton on the steeringwheel to select theSett.Sett.menu.
XPress thedorcbutton to select theLightLightsubmenu.
XPressvto confirm.
XPress thedorcbutton to select theDaytime Running LightsDaytime Running Lightsfunction.If theDaytimeDaytimeRunningRunningLightsLightsfunction hasbeen switched on, the multifunction displayshows the cone of light and the

Display messages
Introduction
General notes
Display messages appear in the multifunction display.
Display messages with graphic displays may be shown in simplified form in the Operator's Manualand may therefore differ from the multifunction display.
Please respond in accordance with the display messages and follow the additional notes in thisOperator's Manual.
Certain display messages are accompanied by an audible warning tone or a continuous tone.
When the ignition is switched off, all display messages are deleted, apart from some high-prioritydisplay messages. Once the causes of the high-priority display messages have been rectified, thecorresponding display messages are also deleted.
When you stop and park the vehicle, please observe the notes on:
RHOLD function (Ypage 158)
RParking (Ypage 142)
Hiding display messages
XPress thevor8button on the steering wheel.The multifunction display hides the display message.
The multifunction display shows high-priority display messages in red. Some high-priority displaymessages cannot be hidden.
The multifunction display shows these messages continuously until the causes for the messageshave been remedied.
Message memory
The on-board computer saves certain display messages in themessage memory. You can call upthe display messages:
XPress theYorebutton on the steering wheel to select theServ.Serv.menu.If there are display messages, the multifunction display shows2 Messages2 Messages, for example.
XPress thecordbutton to select the entry, e.g.2 Messages2 Messages.
XPressvto confirm.
XPress thecordbutton to scroll through the display messages.
Displaymessages193
On-b oard computer and displays
Z

Safety systems
Display messagesPossible causes/consequences andPPSolutions
%

Display messagesPossible causes/consequences andPPSolutions

Display messagesPossible causes/consequences andPPSolutions
z%

Display messagesPossible causes/consequences andPPSolutions
The yellow$warning lamp and the redI(USA only) or$(Canada only) indicator lamp light up.
The electric parking brake is malfunctioning.
To release:
XSwitch off the ignition and turn it back on.
XRelease the electric parking brake manually.
or
XRelease the electric parking brake automatically (Ypage 143).
If the electric parking brake still cannot be released:
XDo not drive on.
XConsult a qualified specialist workshop.
The redI(USA only) or$(Canada only) indicator lamp flashesand the yellow$warning lamp lights up.
The electric parking brake is malfunctioning.
To release:
XSwitch off the ignition and turn it back on.
XRelease the electric parking brake manually.
To apply:
XSwitch off the ignition and turn it back on.
XApply the electric parking brake manually.
If the redI(USA only) or$(Canada only) indicator lamp con-tinues to flash:
XDo not drive on.
XSecure the vehicle against rolling away (Ypage 312).
XShift the transmission to position].
XTurn the front wheels towards the curb.
XConsult a qualified specialist workshop.
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On-b oard computer and displays
Z

Display messagesPossible causes/consequences andPPSolutions
The yellow$warning lamp lights up. The redI(USA only)or$(Canada only) indicator lamp flashes for about ten secondsafter the electric parking brake has been applied or released. It thengoes out or remains lit.
The electric parking brake is malfunctioning.
XSwitch off the ignition and turn it back on.
XApply the electric parking brake.
If it is not possible to apply the electric parking brake:
XShift the transmission to position].
XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake manually:
XRelease the electric parking brake automatically (Ypage 143).
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.
The yellow$warning lamp lights up. If you manually apply orrelease the electric parking brake, the redI(USA only) or$(Canada only) indicator lamp flashes.
The electric parking brake is malfunctioning. It is not possible to applythe electric parking brake manually.
XShift the transmission to position]as the electric parking brake isnot applied automatically.
XVisit a qualified specialist workshop.
I(USA
only)$(Canada
only)
Parking Brake Inop‐Parking Brake Inop‐erativeerative
The yellow$warning lamp lights up. The redI(USA only)or$(Canada only) indicator lamp flashes for about ten secondsafter the electric parking brake has been applied or released. It thengoes out or remains lit.
The electric parking brake is malfunctioning, e.g. because of over-voltage or undervoltage.
XRemove the cause for the overvoltage or undervoltage, e.g. bycharging the battery or restarting the engine.
XApply or release the electric parking brake.
If it remains impossible to apply or release the electric parking brake:
XSwitch off the ignition and turn it back on.
XApply or release the electric parking brake.
If the electric parking brake still cannot be released:
XConsult a qualified specialist workshop.
If the electric parking brake still cannot be applied:
XVisit a qualified specialist workshop.
198Displaymessages
On-b oard computer and displays

Display messagesPossible causes/consequences andPPSolutions
The yellow$warning lamp lights up and the redI(USA only)or$(Canada only) indicator lamp flashes.
It is not possible to apply the electric parking brake manually.
XShift the transmission to position].
XVisit a qualified specialist workshop.
'(USA only)
M(Canada only)
Check Brake FluidCheck Brake FluidLevelLevel
There is not enough brake fluid in the brake fluid reservoir.
A warning tone sounds. The'(USA only) orM(Canada only)warning lamps in the instrument cluster may also light up.
GWARNING
The braking effect may be impaired.
There is a risk of an accident.
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions. Do not continue drivingunder any circumstances.
XSecure the vehicle against rolling away (Ypage 142).
XConsult a qualified specialist workshop.
XDo not add brake fluid. This does not correct the malfunction.
&
CheckCheckBrakeBrakePadPadWearWear
The brake pads/linings have reached their wear limit.
XVisit a qualified specialist workshop.
S
InoperativeInoperative
Malfunction of one or more main functions of the Mercedes me con-nect system.
XVisit a qualified specialist workshop.
MercedesMercedesmemeconnectconnectServices LimitedServices LimitedSee Operator's Man‐See Operator's Man‐ualual
Service limited.
Malfunction of one or more main functions of the Mercedes me con-nect system.
XObserve the notes on diagnostics connection (Ypage 28).
XVisit a qualified specialist workshop.
Displaymessages199
On-b oard computer and displays
Z

Display messagesPossible causes/consequences andPPSolutions
ActiveActiveBrakeBrakeAssistAssistFunctionsFunctionsCurrentlyCurrentlyLimited See Opera‐Limited See Opera‐tor's Manualtor's Manual
Active Brake Assist is temporarily inoperative.
Possible causes are:
Rthe radar sensor system is temporarily inoperative, e.g. due to elec-tromagnetic radiation emitted by nearby TV or radio stations orother sources of electromagnetic radiation
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 messagedisappears.
Active Brake Assist is operational again.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 142).
XRestart the engine.
Active BrakeActive BrakeAssist:Assist:SystemSystemInop‐Inop‐erativeerative
Active Brake Assist is unavailable due to a malfunction. Situation-dependent braking assistance may also have failed.
XVisit a qualified specialist workshop immediately.
RadarRadarSensorsSensorsDirtyDirtySee Operator's Man‐See Operator's Man‐ualual
The radar sensor system is malfunctioning.
Possible causes are:
Rdirt on sensors
Rheavy rain or snow
Rwhen driving on inter-urban roads without traffic or infrastructure,e.g. in desert-like areas
At least one driving system or driving safety system is malfunctioningor is temporarily unavailable:
RActive Brake Assist
RActive Distance Assist DISTRONIC
A warning tone also sounds.
Once the cause of the problem is no longer present, the driving anddrive safety systems will be available again. The display message dis-appears.
If the display message does not disappear:
XPull over and stop the vehicle safely as soon as possible, payingattention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 142).
XSwitch off the engine.
XClean all sensors (Ypage 269).
XRestart the engine.The display message disappears.
200Displaymessages
On-b oard computer and displays