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Ty
res Displa
ymessages
Possible causes/consequences and M
MSolutions
Tyre pressure Check tyres *T
he tyr epressur eloss warning sy stem has de tected asignificant los sinpressure. &
WARNING Risk of an accident du etoinsufficient tyr epressure
Ty resw ithi nsuf ficient tyr epressur eposet he following risks:
R The tyres ma yburst,e speciall yasthe load and vehicle speed increase.
R The tyres ma ywear excessively and/or une venly, whic hmaygreatl yimp air tyr etraction.
R ‑The drivin gcharacteristics, steering and braking ma ybegreatl yimp aired.
Yo uc ouldthen lose control of thev ehicle. #
Obser vether ecommende dtyrep ressures. #
Adjus tthe tyr epressur eifn ecessar y. #
Stop thev ehicle, paying attention toroad and traf ficc onditions. #
Chec kthe tyr epressur eand thet yres. #
When thet yrep ressur eisc orrect, restar tt he tyr epressur eloss warning sy stem .
Check tyre pressures then
restar tRun Flat Indicator *T
he tyr epressur eloss warning sy stem generated adispl ay messa geand has no tbeen restar teds ince. #
When thet yrep ressur eisc orrect, restar tt he tyr epressur eloss warning sy stem .
Run Flat Indicator inopera-
tive *T
he tyr epressur eloss warning sy stem is malfunctioning. #
Consult aqualified specialis tworks hop. 502
Displa ymessages and warning/indicator lamps
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Displa
ymessages
Possible causes/consequences and M
MSolutions
h Rectify tyre pressure *T
he tyr epressur eist oo lo winatl eastone of thet yres, or thet yrep ressur ediffe re nce betwee nthe wheels is too
great. #
Chec kthe tyr epressur eand add air ,ifnecessar y. #
When thet yrep ressur eisc orrect, restar tt he tyr epressur emonitoring sy stem .
h
Check tyre(s) *T
he tyr epressur eino ne or mor etyres has dropped significantl y.The wheel position is displa yed. &
WARNING Risk of an accident du etoinsufficient tyr epressure
Ty resw ithi nsuf ficient tyr epressur eposet he following risks:
R The tyres ma yburst,e speciall yasthe load and vehicle speed increase.
R The tyres ma ywear excessively and/or une venly, whic hmaygreatl yimp air tyr etraction.
R ‑The drivin gcharacteristics, steering and braking ma ybegreatl yimp aired.
Yo uc ouldthen lose control of thev ehicle. #
Obser vether ecommende dtyrep ressures. #
Adjus tthe tyr epressur eifn ecessar y. #
Stop thev ehicle, paying attention toroad and traf ficc onditions. #
Chec kthe tyr epressur eand thet yres. Displa
ymessages and warning/indicator lamps 503
Page 507 of 585

Displa
ymessages
Possible causes/consequences and M
MSolutions
h Warning tyre defect *T
he tyr epressur eino ne or mor etyres has dropped suddenly .The wheel position is displa yed. &
WARNING Risk of an accident from driving wi thaflat tyre
Flat tyres ar edangerous in thef ollowing ways:
R The tyres can overheat and cause afire.
R ‑The driving characteristics, steering and braking ma ybegreatl yimp aired.
Yo uc ouldthen lose control of thev ehicle. #
Do no tdrive wit haf lat tyre. #
Obser vethen otes on flat tyres. No
tesonf lat tyres (→ page409). #
Stop thev ehicle, paying attention toroad and traf ficc onditions. #
Chec kthe tyres.
Tyre press. monitor cur-
rently unavailable *N
osignals can be recei vedf romt he tyr epressur esensor sdue tostro ngradio signal source inter fere nce. The tyre
pressur emonitoring sy stem is temp oraril yunavailable. #
Driv eon.
The tyr epressur emonitoring sy stem restarts automaticall yassoon as thec ause has been rectified. 504
Displa ymessages and warning/indicator lamps
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Displa
ymessages
Possible causes/consequences and M
MSolutions
h Wheel sensor(s )missing *T
her eisnos ignal from thet yrep ressur esensor of one or mor ewheels. The pressur eofthe affected tyr eisnot
displ ayed. #
Have thef aulty tyr epressur esensor replaced at aqualified specialis tworks hop.
Tyre press. monitor inoper-
ative No wheel sensors *T
he wheels fitted do no thave suitable tyr epressur esensors. The tyr epressur emonitoring sy stem is deactivated. #
Fit wheels wit hsuitable tyr epressur esensors.
Tyre press. monitor inoper-
ative *T
he tyr epressur emonitoring sy stem is faulty. &
WARNING Thereisar isk of an accident if thet yrep ressur emonitoring sy stem is malfunctioning
If th et yrep ressur emonitoring sy stem is malfunctioning, it is no table toissue awarning if ther eisp ressure
loss in one or mor eofthe tyres.
Ty resw ithi nsuf ficient tyr epressur emay,for example, af fect thev ehicle's handling characteristics, steering and
braking. ‑ #
Have thet yrep ressur emonitoring sy stem checkedataq ualified specialis tworks hop. #
Consult aqualified specialis tworks hop.
Tyre(s) overheated *A
tlea st one tyre is overheating. The af fected tyres ar edispl ay ed in red. At temp eratures close tothel imit value,
th et yres ar edispla yediny ellow. #
Driv emores lowl y. Displ
aymessa gesa nd warning/indicator lamps 505
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Displa
ymessages
Possible causes/consequences and M
MSolutions
Tyre(s) overheated Reduce
speed *A
tlea st one tyre is overheating. &
WARNING Risk of an accident from driving wi thove rheated tyres
Overheated tyres ma yburst,p articularly at high speeds. #
Reduce speed so that thet yres cool down. #
Reduce speed so that thet yres cool down. Key
Displa
ymessages
Possible causes/consequences and M MSolutions
 Replace key *T
hekeyn eeds tobe replaced. #
Consult aqualified specialis tworks hop.
, Replace key See Owner's
Manual *
Ve hicles with adigital vehicl ekey: onlyaf ewor no authorisations remain fors tartin gt he engine. #
Mak esuret hat thei nterne tconnection is no tlimited bycer tain mobile phon esettings. #
Open theM ercedes me connect weba pp http://www.mercedes.me. and call up thed igital vehicle keys ervice. #
Deactivat ethe service firs ta nd then activat eitagain. #
Ifth ed ispla ymessag estilla ppears, con tact theM ercedes-Benz Cus tomer Assis tance Center (C AC). 506
Displa ymessages and warning/indicator lamps
Page 510 of 585
Displa
ymessages
Possible causes/consequences and M
MSolutions
 Change key batteries *T
hekeyb atte ry is dischar ged. #
Replace theb atter y.
Â
Key not detected (white
displa ymessage) *T
hekeyisc urrently und etected. #
Chang ethe location of thek eyinthev ehicle. #
Ifth ek eyisstill no trecognised, star tt he engine wit hthe keyint he stow agec ompartment .
 Key no tdetected (red dis‐
pla ym essage) *T
hekeyc anno tbed etected and ma ynolonger be in thev ehicle.
The keyisn olon gerint hevehicle and yous wit ch offt he engine:
R youc an no lon gers tart thee ngine.
R youc anno tcentrally loc kthe vehicle. #
Ensur ethat thek eyis in thev ehicle.
If th ek eydetection function ha samalfunction du etoastrongradio signal source: #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions. #
Place thek eyinthes towa ge compartment fors tartin gt he engine wit hthe key. Displa
ymessages and warning/indicator lamps 507
Page 511 of 585
Displa
ymessages
Possible causes/consequences and M
MSolutions
 Place the key in the
marked space See Owner's
Manual *T
hekeyd etection function is malfunctioning. #
Chang ethe location of thek eyinthev ehicle. #
Startt he vehicle wit hthe keyint he stow agec ompartment . Ve
hicle Displa
ymessages
Possible causes/consequences and M MSolutions
j Trailer coupling extending… *R
etra ct or extend theb all nec k.
Do no tattem pttospeed up, slo wdownori nitiatethe retracting or extending process using your hand, foot or other
aids. During ther etra cting or extending process, do no tcoupl eat railer.
When theb all nec khasreached an operational position ,the displa ymessag edisappears. 508
Displa ymessages and warning/indicator lamps
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Displa
ymessages
Possible causes/consequences and M
MSolutions
j Check trailer hitch lock *T
he trailer hitc hisnotoperational when youa redrivin gwithat railer. #
Stop thev ehicle immediately ,paying attention toroad and traf ficc onditions ,and switc hoffthee ngine. #
Uncoupl ethe trailer and safeguar ditagains trolling away. #
Initiat eanewswivelling procedur e. #
Ifth eb all nec kisextended, press and hol dthe button on thet ailgat euntil theb all nec kengages beneat hthe
bumper. #
When thed ispla ymessag edisappears, couple up thet railer and driv eon. &
WARNING Risk of an accident if theb all nec kisnotloc ked
If th eb all nec kisnotinthel oc kedp osition ,the trailer ma ycome loose. #
Pull overand stop thev ehicle safely as soon as possible, paying attention toroad and traf ficc onditions.
Do no tcontinu edriving under an ycircums tances. #
Uncoupl ethe trailer and secur eitagains trolling away. #
Initiat eanewswivelling procedur eand do no tre-couple thet railer until thed ispla ymessag edisappears. If
th ed ispla ymessag edoes no tdisappear ,the trailer hitc hisdefectiv eand theb all nec kisnotloc ked. #
Do no tcouple up thet railer .Drive on without thet railer .Notet he reduced ground clearance due tothe
unlo cked ball nec k. #
Consult aqualified specialis tworks hop.
The trailerh itchisn otoperational when thev ehicle is at astandstill. Displa
ymessages and warning/indicator lamps 509