2019 MERCEDES-BENZ CLA Engine

There is a short delay before a change in outsidetemperature appears in the multifunction dis-play.
Coolant temperature gauge
GWARNING
Opening the hood when the engine is over-
heated or when there is a fire in the engine
compartment could expose you to hot gases
or other service products. There is a risk of
injury.
Let an overheated engine cool down before
opening the hood. If there is a fire in the
engine compartment, keep the hood closed
and contact the fire department.
!A display message is shown if the coolanttemperature is too high.
If the coolant temperature is over 248 ‡(120 †), do not continue driving. The enginewill otherwise be damaged.
The coolant temperature gage is in the instru-ment cluster on the right-hand side (Ypage 33).
TheHmarking in the coolant temperature gaugecorresponds to a coolant temperature ofapproximately 248 ‡ (120 †).
Under normal operating conditions and at thecorrect coolant level, the coolant temperaturegauge may rise to theHmarking.
Operating the on-board computer
Overview
CMultifunction display
DRight control panel

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

temperature. Avoid driving at full engine out-put during this time.
SETUP
CDrive systemComfortComfort/SportSport/Sport +Sport +
DChassisComfortComfort/SportSport/Sport +Sport +

XPress the8button on the steering wheel.
XConfirmYesYeswithv.
The RACE TIMER interrupts timing if you stop thevehicle and turn the SmartKey to positionGinthe ignition lock. If you turn the SmartKey topositionIand then pressvStartStartto con-firm, timing is continued.
Resetting the current lap
XStop the RACE TIMER.
XPress theYorebutton to selectReset LapReset Lap.
XPressvto reset the lap time to "0".
Deleting all laps
If you switch off the engine, the RACE TIMER isreset to "0" after 30 seconds. All laps aredeleted.
You cannot delete individual stored laps. If youhave stopped 16 laps, the current lap does nothave to be reset.
XReset the current lap.
XPressvto confirmResetReset.Reset Race-Timer?Reset Race-Timer?appears in the multi-function display.
XPress thedbutton to selectYesYesand pressthevbutton to confirm.All laps are deleted.
Overall statistics
CRACETIMER overall evaluation
DTotal time driven

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
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

Engine
Display messagesPossible causes/consequences andPPSolutions

Display messagesPossible causes/consequences andPPSolutions
=
See Operator's Man‐See Operator's Man‐ualual
The battery is not being charged.
A warning tone also sounds.
Possible causes are:
Ra defective alternator
Ra torn poly-V-belt
Ra malfunction in the electronics
!Do not drive any further. Otherwise the engine may overheat.
XPull over and stop the vehicle safely and switch off the engine, pay-ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 142).
XConsult a qualified specialist workshop.
=
Stop Vehicle SeeStop Vehicle SeeOperator's ManualOperator's Manual
The battery is no longer being charged and the condition of charge istoo low.
A warning tone also sounds.
XPull over and stop the vehicle safely and switch off the engine, pay-ing attention to road and traffic conditions.
XSecure the vehicle against rolling away (Ypage 142).
XObserve the instructions in the display message=See Oper‐See Oper‐ator's Manualator's Manual.
XConsult a qualified specialist workshop.