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ing condition (→page 387). Observethenotes on tiretemperature (→page 386).
Thevalues displayed inthe multifunction dis‐play may deviate fromthose ofthe tire pres‐suregauge astheyrefertosea level.Athighaltitudes,the tire pressurevalue indicatedbya pressuregauge are higherthanthoseshownbythe on-board computer. Inthiscase, do notreducethe tire pressure.
Make suretoobservethefollowing furtherrela‐ted subject:
RNotes on tire pressure (→page 386)
Restartingthe tire pressure monitoring sys‐tem
Requirements:RTherecommended tire pressure is correctlysetfortherespective operatingstatus oneach ofthefour wheels (→page 386).
Restartthe tire pressure monitoring system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
On-board computer:
Service Tires
Swipe downwards onTouch Control ontheleft-hand side ofthesteering wheel.TheUse Current Pressures as New Refer-ence Values?message is shown inthe multi‐function display.
Tobeginrestart, pressTouch Control ontheleft-hand side ofthesteering wheel.TheTire Press. Monitor Restartedmessage isshown inthe multifunction display.
Currentwarning messages are deleted andtheyellow wwarning lamp goes out.
Afteryou havebeen drivingfor afewminutes,the systemcheckswhetherthe cur‐rent tire pressures are withinthe specifiedrange. The current tire pressures arethenaccepted asreferencevalues and monitored.
Make suretoobservethefollowing furtherrela‐ted subject:
RNotes on tire pressure (→page 386)
Radio equipment approval ofthe tire pres‐sure monitoring system
Radio equipment approval numbers
CountryRadio type approval number
Canada IC: 2546A-AG5SP4
USAFCC ID: MRXAG5SP4
FCC ID: MRXMFR
Further information onthe declaration of con‐formityfor wirelessvehicle components(→page 23).
Tirepressure losswarning system
Function ofthe tire pressure losswarningsystemThe tire pressure losswarning systemwarnsthedriverbymeans of display messages whenthereis a severetire pressureloss.
After achange in tire pressure, a wheelrotationor a tirechange, or ifyou havere-installedwheels or tires,the tire pressure losswarningsystem hastoberestarted (→page 392).
Wheels and tires391
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The tire pressure losswarning system does notreplacethe needtoregularlycheckthe tire pres‐sure.
System limitations
The system may be impaired or may not functionparticularlyinthefollowing situations:
RIncorrectly set tire pressure
RSudden pressure loss caused,forexample,byaforeign object penetratingthe tire
RSteady pressure loss in several tires
The system has arestricted or delayed functionparticularly inthefollowing situations:
RPoor ground conditions, e.g. snow or gravel
RDriving withsnowchains
RWhen adopting averysporty drivingstylewith high cornering speeds or sudden accel‐eration
RDriving with a high load
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
RDisplay messages aboutthe tires(→page 460)
Restartingthe tire pressure losswarningsystem
Requirements:RTherecommended tire pressure is correctlysetfortherespective operatingstatus oneach ofthefour wheels (→page 386).
Restartthe tire pressure losswarning system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
On-board computer:
Service Tires
Swipe downwards ontheTouch Control onthe left-hand side ofthesteering wheel.TheTire Pressure Control SystemActiveRestart: Press Touch Controlmessageis shown inthe multifunction display.
Restartthe tire pressure losswarning system inthefollowing situations:
RThe tire pressure haschanged.
RThe wheels or tires havebeenchanged ornewly installed.
Tobegintherestart, presstheTouch Controlonthe left-hand side ofthesteering wheel.TheTire Pressure Now OK?message isshown inthe multifunction display.
SelectYes.
Toconfirmtherestart, presstheTouch Con‐trol onthe left-hand side ofthesteeringwheel.TheRun Flat Indicator Restartedmessage isshown inthe multifunction display.
Afteryou havedrivenfor afew minutes,thetire pressurelosswarning system monitorsthe set tire pressures of allthe tires.
Be suretoalso observethefollowing furtherrelated subjects:
RNotes on tire pressure (→page 386)
392Wheels and tires
Page 429 of 530
Display messages
Introduction
Notes on display messagesDisplay messages appear onthe multifunctiondisplay.
Displaymessages with graphic symbols are sim‐plified inthe Operator's Manual and may differfromthe symbols onthe multifunction display.The multifunction display showshigh-priority dis‐play messages inred. Certain display messagesare accompaniedbyawarningtone.
Pleaserespond in accordance withthe displaymessages andfollowthe additional notes inthisOperator's Manual.
For some display messages, a symbol is alsoshown:
R
Page 430 of 530
Safety systems
Display messagesPossible causes/consequences and P PSolutions
Page 431 of 530
Display messagesPossible causes/consequences and P PSolutions
(Canada only)
Turn On the Ignition toRelease the Parking Brake
I
(USA only)
$
(Canada only)
Parking Brake See Opera-tor's Manual
*Theyellow $indicator lamp is lit. The electric parking brake is malfunctioning.
Toapply:
Switch offthe ignition and switch it back on.
Applythe electric parking brake manually (→page164).
If it isnot possibletoapplythe electric parking brake:
Visit aqualified specialistworkshop.
Where necessary,also safeguardthe parkedvehicle againstrollingaway.Theyellow $andthered I(USA only) or $(Canada only) indicator lamps are lit. The electric parkingbrake is malfunctioning.
Torelease:
Switchoffthe ignition and switch it back on.
Releasethe electric parking brake manually (→page164).
or
Releasethe electric parking brake automatically (→page163).If it isstill not possibletoreleasethe electric parking brake:
Do not continue driving under any circumstances. Consult aqualified specialistworkshop.
Display messages andwarning/indicator lamps429
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Display messagesPossible causes/consequences and P PSolutions
Theyellow $indicator lamp is lit andthered I(USA only) or $(Canada only) indicator lamp isflashing.The electric parking brake is malfunctioning.
The electric parking brake could not be applied orreleased.
Switchoffthe ignition and switch it back on.
Toapply:
Release andthen applythe electric parking brake manually (→page164).
Torelease:
Apply andthenreleasethe electric parking brake manually.
Ifthe electric parking brake cannotbe applied orthered I(USA only) or $(Canada only) indicator lampcontinuestoflash:
Do not continue driving under any circumstances. Consult aqualified specialistworkshop.
Where necessary,also safeguardthe parkedvehicle againstrollingaway.Theyellow $indicator lamp is on andthered Iindicator lamp (USA only) orthe $indicator lamp (Can‐ada only)flashesfor approximatelyten seconds afterthe electric parking brake has been applied orreleased. Itthenremains lit or goes out. The electric parking brake is malfunctioning.
Ifthe batterychargelevel istoo low:
Chargethe battery.
Toapply:
430Display messages andwarning/indicator lamps
Page 433 of 530
Display messagesPossible causes/consequences and P PSolutions
Switch offthe ignition.The electric parking brake is applied automatically.
Ifthe electric parking brake should not be applied, e.g. whenwashingthevehicle in an automatic carwash or whenhavingthevehicletowed, leavethe ignition switched on. This does not include havingthevehicletowed withtherear axleraised.
Ifthe electric parking brake is not applied automatically:
Switch offthe ignition and switch it back on.
Release andthen applythe electric parking brake manually (→page164).
If it isstill not possibletoapplythe electric parking brake:
Visit aqualified specialistworkshop.
Where necessary,also safeguardthe parkedvehicle againstrollingaway.
Torelease:
Ifthe conditionsfor automaticrelease are fulfilled andthe electric parking brake is notreleased automatically,releasethe electric parking brake manually (→page164).
If it isstill not possibletoreleasethe electric parking brake:
Do not continue driving under any circumstances. Consult aqualified specialistworkshop.
Display messages andwarning/indicator lamps431
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Display messagesPossible causes/consequences and P PSolutions
I
(USA only)
$
(Canada only)
Please Release ParkingBrake
*Thered I(USA only) or $(Canada only) indicator lampflashes.
The electric parking brake is applied whileyou are driving:
RA conditionfor automaticrelease ofthe electric parking brake is not fulfilled (→page163).
RYou are performing emergency braking usingthe electric parking brake (→page164).
Checkthatthe conditionsfor automaticrelease ofthe electric parking brake are fulfilled.
Releasethe electric parking brake manually.
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