2018 MERCEDES-BENZ S-CLASS SEDAN Owner's Manual

Tire s
Displa ymessages
Possible causes/consequences and MSolutions
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he tire pressure is too low in at least one of the tires, or the tire pressure dif fere nce between the wheels is too
great.
#Check the tire pressure and add air, if necessar y.
#Whenthe tire pressure is cor rect, restart the tire pressure monitoring sy stem .
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he tire pressure in one or more tires has dropped significantl y.The wheel position is displa yed.
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WARNING Risk of an accident due toinsuf ficient tire pressure
Ti re pressures that are too low pose thefo llowing hazards:
RThe tires may bur st, especially as the load and vehicle speed increase.
RThe tires may wearexc essively and/or une venly, which may greatly impair tire traction.
RThe driving characteristics, as well as steering and braking, may be greatly impaired.
Yo u could then lose control of theve hicle.
#Obser vethere commended tire pressure.
#Ad just the tire pressure if necessar y.
#Stop theve hicle, paying attention toroad and traf fic conditions.
#Check the tire pressure and the tires.
Display messages and warning/indicator lamps 487

Displaymessages
Possible causes/consequences and MSolutions
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he tire pressure in one or more tires has dropped suddenly. The wheel position is displa yed.
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WARNING Risk of an accident from driving wi thaflat tire
Flat tires are dangerous in thefo llowing ways:
RThe tires can overheat and cause a fire .
RThe driving characteristics, as well as steering and braking, may be greatly impaired.
Yo u could then lose control of theve hicle.
#Do not drive with a flat tire.
#Observ eth e no tes on flat tires.
No tes on flat tires (→page 393).
#St op theve hicle, paying attention toroad and traf fic conditions.
#Check the tires.
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o signals can be receive d from the tire pressure sensor due tostro ngradio signal source inter fere nce. The tire
pressure monito ring sy stem is temp orarily una vailable.
#Drive on.
The tire pressure monitoring sy stem restarts automatically as soon as the cause has been rectified.
488
Display messages and warning/indicator lamps

Displaymessages
Possible causes/consequences and MSolutions
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here is no signal from the tire pressure sensor of one or more wheels. The pressure of the af fected tire is not
displ ayed.
#Ha ve the defective tire pressure sensor replaced at a qualified specialist workshop.
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he wheels ins talled do not ha vesuitable tire pressure sensors. The tire pressure monitoring sy stem is deactivated.
#Ins tall wheels with suitable tire pressure sensors.
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he tire pressure monitoring sy stem is malfunctioning.
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WARNING Thereis arisk of an accident if the tire pressure monitoring sy stem is malfunctioning
If th e tire pressure monitoring sy stem is malfunctioning, it is not able toissue a warning if there is pressure loss
in one or more of the tires.
Und erinflated tires ma y,forex ample, impair the driving, steering and braking characteristics.
#Ha ve the tire pressure monitoring sy stem checked at a qualified specialist workshop.
#Visit a qualified specialist workshop.
Display messages and warning/indicator lamps 489

SmartKey
Displaymessages
Possible causes/consequences and MSolutions
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he SmartK eyneeds tobe replaced.
#Visit a qualified specialist workshop.
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he SmartK eybattery is dischar ged.
#Re place the battery .
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he SmartK eyis cur rently und etected.
#Change the location of the SmartK eyintheve hicle.
#Ifth e SmartK eyisstill not recognized, start the engine with the SmartK eyinthestow age compartment .
490
Display messages and warning/indicator lamps

Displaymessages
Possible causes/consequences and MSolutions
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he SmartK eycannot be de tected and may no longer be in theve hicle.
The SmartK eyis no longer in theve hicle and youswit choff the engine:RYo u can no longe rst art the engine.
Ryo u cannot centrally lock theve hicle
#Ensure that the SmartK eyis in theve hicle.
If th e SmartK eydetection function has a malfunction due toast ro ng radio signal source:
#Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
#Place the SmartK eyinthestow age compartment forst arting the engine with the SmartK ey.
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warning tone also sounds. This message reminds youto take your Sm artK eywith youwhen you lea vetheve hicle.
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he SmartK eydetection function is malfunctioning.
#Change the location of the SmartK eyintheve hicle.
#Start theve hicle with the SmartK eyinthestow age compartment .
Display messages and warning/indicator lamps 491

Vehicle
Display messages
Possible causes/consequences and MSolutions
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Yo u ha veattem ptedto shift the transmission out of position jand into ano ther transmission position.
#Depress the brake pedal.
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Yo u ha veattem ptedto shift the transmission out of position jori into ano ther transmission position.
#Depress the brake pedal.
#St art the engine.
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The driver's door is not fully closed and the transmission is in position k,iorh.
#Shift the transmission toposition jwhen you park theve hicle.
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While theve hicle is rolling or while you are driving,the transmission has been shif tedto position i.
#Depress the brake pedal tostop and, when theve hicle is stationar y,shift the transmission toposition j.
#Tocontinue your journe y,shift the transmission toposition hork.
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The transmission can only be shif tedto position jwhen theve hicle is stationar y.
492
Display messages and warning/indicator lamps

Displaymessages
Possible causes/consequences and MSolutions
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he transmission is malfunctioning. The transmission position can no longer be shif ted.
#When the transmission is in position h, consult aqualified specialist workshop and do not shift the transmis‐
sion position.
#Fo r all other transmission positions, park theve hicle safely.
#Consult a qualified specialist workshop or breakdown service.
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ou are leaving theve hicle when it is in a ready-to-drive state.
#When you lea vetheve hicle, switch off the ignition and take the SmartK eywith you.
#Ifyo udo not lea vetheve hicle, switch off the electrical consumers, e.g. the seat heater. Otherwise, the12 V
battery might dischar geand it will then only be possible tostart theve hicle using a second battery (s tarting
assis tance).
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The transmission is malfunctioning. The transmission shift sto position iautomaticall y.
#Pullover and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions.
#Before le aving theve hicle, apply the electric parking brake.
#Switch the transmission toposition j.
#Consult a qualified specialist workshop.
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he transmission is malfunctioning. Reversege ar can no longe r be engaged.
#Visit a qualified specialist workshop.
Display messages and warning/indicator lamps 493

Displaymessages
Possible causes/consequences and MSolutions
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he transmission has overheated. Pulling away can be temp orarily impaired or not possible.
#Pull over and stop theve hicle safely as soon as possible, paying attention toroad and traf fic conditions. Do not
continue driving under any circums tances.
#St art the engine.
#Wa it until the display message disappears before pulling away.
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he auxiliary batteryforth e transmission is no longer being charge d.
#Visit a qualified specialist workshop.
#Un tilthen, manually set the transmission toposition jbefore you switch offthe engine.
#Before leaving theve hicle, apply the electric parking brake.
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peration of the climate control sy stem is temp orarily restricted. Air flow and fresh air supply are set toautomatic
mode.
#Ha ve the climate control sy stem checked at a qualified specialist workshop.
494
Display messages and warning/indicator lamps