2019 MERCEDES-BENZ S CLASS Owners Manual

Tires
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Warning Tire Malfunction
*The tire pressure in one or more tires has dropped suddenly. The wheel position is displayed.
&WARNINGRisk of an accident from driving withaflat tire
Flat tires are dangerous inthefollowingways:
RThe tires canoverheat and cause afire.
RThe drivingcharacteristics, aswell assteering and braking, may be greatly impaired.
You couldthen lose control ofthevehicle.
#Do not drive with aflat tire.
#Observethe notes onflat tires.
Notes onflat tires (→page413).
#Stopthevehicle, paying attentiontoroad and traffic conditions.
#Checkthe tires.
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Check Tires
*The tire pressure in one or more tires has dropped significantly.The wheel position is displayed.
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Display messagesPossible causes/consequences andPPSolutions
&WARNINGRisk of an accident duetoinsufficient tire pressure
Tirepressuresthat aretoo low posethefollowing hazards:
RThe tires may burst, especially asthe load andvehicle speed increase.
RThe tires maywearexcessively and/or unevenly,which may greatly impair tire traction.
RThe drivingcharacteristics, aswell assteering and braking, may be greatly impaired.
You couldthen lose control ofthevehicle.
#Observetherecommended tire pressure.
#Adjustthe tire pressure if necessary.
#Stopthevehicle, paying attentiontoroad and traffic conditions.
#Checkthe tire pressure (→page 435) andthe tires.
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Please Correct Tire Pres-sure
*The tire pressure istoo low in at least one ofthe tires, orthe tire pressure difference betweenthe wheels istoogreat.
#Checkthe tire pressure and add air, if necessary.
#Whenthe tire pressure is correct,restartthe tire pressure monitoring system (→page441).
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*There is interference from a powerfulradio signal source. As aresult, no signals fromthe tire pressure sensor arereceived. The tire pressure monitoring system istemporarily unavailable.
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Tire Press. Monitor Cur-rently Unavailable
#Drive on.The tire pressure monitoring systemrestarts automatically as soon asthe cause has beenrectified.
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Wheel Sensor(s) Missing
*The tire pressure sensor signal is missing from one or more tire(s). The pressure ofthe affected tire is not dis‐played.
#Havethe defective tire pressure sensorreplaced at aqualified specialistworkshop.
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Tire Pressure Monitor Inop-erative No Wheel Sensors
*The wheels installed do not havesuitable tire pressure sensors. The tire pressure monitoring system is deactivated.
#Install wheels with suitable tire pressure sensors.
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Tire Press. Monitor Inopera-tive
*The tire pressure monitoring system is defective.
&WARNINGThereis arisk of an accident ifthe tire pressure monitoring system is malfunctioning
Ifthe tire pressure monitoring system is malfunctioning, it is not abletoissue awarning ifthere is pressure lossin one or more ofthe tires.
Underinflated tires may,forexample, impairthe driving,steering and brakingcharacteristics.
#Havethe tire pressure monitoring systemchecked at aqualified specialistworkshop.
#Visit aqualified specialistworkshop.
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Tires Overheated*At least one tire isoverheating. The affected tires are displayed inred.Attemperatures closetothe limitvalue,thetires are displayed inyellow.
#Drive more slowly.
Decrease Speed*At least one tire isoverheating. The affected tires are displayed inred.Attemperatures closetothe limitvalue,thetires are displayed inyellow.
&WARNINGRisk of an accident from driving withoverheated tires
Overheated tires may burst, particularly at high speeds.
#Reduce speed sothatthe tires cool down.
#Reduce speed sothatthe tires cool down.
SmartKey
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#Ensurethatthe SmartKeyis inthevehicle.
Ifthe SmartKeydetection function has a malfunction duetoastrongradio signal source:
#Pullover andstopthevehicle safely as soon as possible, paying attentiontoroad and traffic conditions.
#Placethe SmartKeyinthe marked spaceforstartingthe engine withthe SmartKey (→page169).

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Display messagesPossible causes/consequences andPPSolutions

Display messagesPossible causes/consequences andPPSolutions
Active Hood MalfunctionSee Operator's Manual
*The active hood (pedestrian protection) is malfunctioning or inoperative after having already been triggered.
#Consult aqualified specialistworkshop.