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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 155).
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 351).
XShift the transmission to position ].
XTurn the front wheels towards the curb.
XConsult a qualified specialist workshop.
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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 155).
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 brakeis not applied automatically.
XVisit a qualified specialist workshop.
If it is not possible to release the electric parking brake manually:
XRelease the electric parking brake automatically (Ypage 155).
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 of 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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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.
In addition, the '(USA only) or M(Canada only) warning lamplights up in the instrument cluster and a warning tone sounds.
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 152).
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.
USA only: the red 'brake system warning lamp is lit while theengine is running.
GWARNING
If the brake pads/linings have reached their wear limit, braking per-formance may be impaired.
There is a risk of an accident.
XDrive on carefully.
XVisit a qualified specialist workshop immediately.
S
InoperativeInoperative
One or more main features of the mbrace system are malfunctioning.
XVisit a qualified specialist workshop.
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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 152).
XRestart the engine.
ActiveActiveBrakeBrakeAssistAssistFunctions LimitedFunctions LimitedSee Operator's Man‐See Operator's Man‐ualual
Active Brake Assist is unavailable due to a malfunction. AdaptiveBrake Assist may also have failed.
XVisit a qualified specialist workshop immediately.
PRE-SAFE Inopera‐PRE-SAFE Inopera‐tivetiveSeeSeeOperator'sOperator'sManualManual
Important functions of PRE-SAFE®have failed. All other occupantsafety systems, e.g. air bags, remain available.
XVisit a qualified specialist workshop immediately.
ActiveActiveBrakeBrakeAssistAssistFunctionsFunctionsCurrentlyCurrentlyLimited See Opera‐Limited See Opera‐tor's Manualtor's Manual
Active Brake Assist with cross-traffic function is temporarily inopera-tive.
Possible causes are:
Rfunction is impaired due to heavy rain or snow
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
RMercedes-AMG vehicles: ESP®is deactivated
When the causes stated above no longer apply, the display messagedisappears.
Active Brake Assist with cross-traffic function 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 152).
XRestart the engine.
XMercedes-AMG vehicles: switch ESP®on again (Ypage 70).
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ActiveActiveBrakeBrakeAssistAssistFunctions LimitedFunctions LimitedSee Operator's Man‐See Operator's Man‐ualual
Active Brake Assist with cross-traffic function is unavailable due to amalfunction.
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 Lane Keeping Assist
RActive Blind Spot Assist
RActive Distance Assist DISTRONIC with Active Steering Assist
If the radar sensor system in front is dirty, Active Blind Spot Assist willnot perform a course-correcting brake application.
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 152).
XSwitch off the engine.
XClean all sensors (Ypage 309).
XRestart the engine.The display message disappears.
u
SRSSRSMalfunctionMalfunctionSer‐Ser‐vice Requiredvice Required
The restraint system is malfunctioning. The uwarning lamp alsolights up in the instrument cluster.
GWARNING
The air bags or Emergency Tensioning Devices may either be triggeredunintentionally or, in the event of an accident, may not be triggered.
There is an increased risk of injury.
XVisit a qualified specialist workshop immediately.
Further information about the restraint system (Ypage 43).
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