2019 MERCEDES-BENZ CLA warning
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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
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the preset list or station list in the desiredfrequency range is shown.
XTo select a station:briefly press cor d.
iSIRIUS XM satellite radio functions like anormal radio.
You can find further information on operationin the "Satellite radio" section of the DigitalOperator's Manual for the multimedia sys-tem.
Operating an audio player or audio
media
CCurrent title
Audio data from various audio devices or mediacan be played, depending on the equipmentinstalled in the vehicle.
XSwitch on the multimedia system and switchon CD or MP3 mode (see the Digital Opera-tor's Manual).
XPress the Yor ebutton on the steeringwheel to select theAudioAudiomenu.
XTo select the next/previous track:brieflypress the cor dbutton.
XTo select a track from the track list (rapidscrolling):press and hold the cor dbutton until desired track appears.
If you press and hold cor d, the rapidscrolling speed is increased. Not all audiodrives or data carriers support this function.
If track information is stored on the audio deviceor medium, the multifunction display will showthe number and title of the track.
Video DVD operation
You can only operate DVD videos in theAudioAudiomenu in vehicles with COMAND.
XSwitch on COMAND and select DVD Video(see the Digital Operator's Manual).
XPress the Yor ebutton on the steeringwheel to select theAudioAudiomenu.
XTo select the next or previous scene:briefly press the cor dbutton.
XTo select a scene from the scene list(rapid scrolling):press and hold the cor dbutton until desired scene Cappears.
Telephone menu
Introduction
GWARNING
If you operate information systems and com-
munication equipment integrated in the vehi-
cle when driving, you may be distracted from
the traffic situation. You could also lose con-
trol of the vehicle. There is a risk of an acci-
dent.
Only operate this equipment when the traffic
situation permits. If you are not sure that this
is possible, park the vehicle paying attention
to traffic conditions and operate the equip-
ment when the vehicle is stationary.
When telephoning, you must observe the legalrequirements for the country in which you arecurrently driving.
XSwitch on the mobile phone (see the manu-facturer’s operating instructions).
XSwitch on the multimedia system (see theDigital Operator's Manual)
Menus and submenus185
On-board computer and displays
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Displaying the assistance graphic
XPress the Yor ebutton on the steeringwheel to select theDriveAssistDriveAssistmenu.
XPress cor dto selectAssist.Assist.GraphicGraphic.
XPress vto 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)
XPress dto 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 the Yor ebutton on the steeringwheel to select theDriveAssistDriveAssistmenu.
XPress cor dto selectESPESP.
XPress vto confirm.The current selection appears.
XTo activate/deactivate:press the vbut-ton again.
ESP®is deactivated if the
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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 the vor 8button 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 the Yor ebutton on the steering wheel to select theServ.Serv.menu.If there are display messages, the multifunction display shows2 Messages2 Messages, for example.
XPress the cor dbutton to select the entry, e.g.2 Messages2 Messages.
XPress vto confirm.
XPress the cor dbutton to scroll through the display messages.
Displaymessages193
On-b oard computer and displays
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Display messagesPossible causes/consequences and P PSolutions
The yellow $warning lamp and the red I(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 red I(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 red I(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
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Display messagesPossible causes/consequences and P PSolutions
The yellow $warning lamp lights up. The red I(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 red I(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 red I(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.
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On-b oard computer and displays
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Display messagesPossible causes/consequences and P PSolutions
The yellow $warning lamp lights up and the red I(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) or M(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.
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Display messagesPossible causes/consequences and P PSolutions
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