2021 MERCEDES-BENZ CLS-Class sensor

&
WARNIN GRisk ofburnsfrom theta il‐
pipe andtailpipe trims
The exhaus tta ilpipe andtailpipe trims can
becom eve ry hot.Ifyo uco me intoco ntact
wit hth ese partsof theve hicle, youco uld
bur nyo urself . #
Alw aysbe par ticular lycareful arou nd
th eta ilpipe andtheta ilpipe trims and
super visechildr enespec iallycloselyin
th is area. #
Allo wvehicle partsto cool down before
to uc hin gth em. To
avo iddamag eto theve hicle, observethe
no teson cleaning andcareof thefo llo wing vehi‐
cle parts:
Wheels andrims
R Use waterand acid-free alloy wheel cleaners.
R Donotuse acidic alloywheel cleanersto
re mo vebrak edus t.This could damag ewheel
bolts andbrak ecom ponen ts.
R Toavo idcor rosion ofthebr ak ediscs and
br ak epads, drive th eve hicle fora fe w minut
esafte rclea ning beforepar king it.The
br ak ediscs andbrak epa dswarm upand dry
out .
Wi ndo ws
R Clean thewindo wsinsid eand outs idewitha
dam pclo thand withacle anin gag ent recom‐
mend edforMer cedes-Benz.
R Donotuse dryclo thsor abr asiv eor sol vent-
ba sed cleani ng agents tocle an theinside of
windo ws.
Wi per blades
R Movethewiper arms intoth ere placemen t
position (/page12 1).
R With thewiper arms folded out,clean the
wiper blades withadam pclo th.
R Donotcle an thewiper blades tooof ten.
Ex terior light ing
R Clean thelenses withawe tsp ong eand mild
cle ani ng agent, e.g.car shampoo.
R Onlyuse cleaning agents orcleaning cloths
th at aresuit able forpla stic lens es. Sensor
s
R Clean thesensor sin thefront and rear
bum perswit hasof tclo thand carsham poo
(/ page16 1).
R Whenusing apo we rwa sher ,maint ainamini‐
mum distance of11.8 in(30 cm).
Re ar vie wcamer aand surround viewcamer a
R Open thecamer aco verwit hth emultimedia
sy stem (/ page203).
R Use clean waterand asof tclo thtocle an the
came ralens .
R Donotuse apo we rwa sher .
Ta ilpip es
R Clean withaclean ingagent recomme nded
fo rMer cedes-Benz, especiallyin thewint er
and afte rwa shing theve hicle.
R Donotuse acidic cleaning agents. Maint
enance andcare27
3

pr
essur ete lltale when oneormor eof your
tir es issign ifican tly unde rinf late d. Ac cor d‐
ing ly,if th elow tirepr essur ete lltale illumi‐
nat es, yousho uld stop and checkyo ur tires
as soo nas poss ible, andinflateth em tothe
pr oper pressur e.Driving onasignif icantly
under inflated tirecauses thetir eto ove rheat
and canlead totirefa ilur e.Un der inflation
also reduces fuelefficie ncy and tiretrea d
li fe ,and mayaf fect theve hicle's handling
and stopping ability.Please note that the
TPMS isno ta subs titutefo rpr oper tiremain‐
te nance ,and itis thedr iver's responsibili ty
to maint aincorrect tirepr ess ure, eve nif
und erinf latio nha sno tre ac hed theleve lto
tr ig ge rill umina tionoftheTPMS low tirepr es‐
sur ete lltale.
Yo ur vehicle hasalso been equipped witha
TPMS malfunction indicatortoindic atewhen
th esy stem isno toper ating proper ly.The
TPMS malfunct ionindicat oriscombin edwith
th elow tirepr essur ete lltale. When thesy s‐
te m detects amal functi on,theindicat or
lam pwill flash forapp roxima tely amin ute and
then remain continuously illumina ted.
This sequence willcontinue upon subseq uent
ve hicle star t-ups aslon gas themalfunct ion
ex ists.
When themalfunct ionindicat orisillumina‐
te d, thesy stem mayno tbe able todetect or
sig nal low tirepr ess ureas intende d.TPM S
mal functi onsmayoccu rfo ra va riet yof rea‐
son s,inc ludin gth eins tallation ofinc om pati‐
ble replacemen tor alternat etir es orwheels
on theve hicle that prev ent theTPMS from
func tioningproper ly.
Alw aysch eckth eTPMS malfunct iontelltale
af te rre placing oneormor etir es orwheels
on your vehicle toensur eth at there place‐
ment oralternat etir es and wheels allowthe
TPMS tocontinu eto function proper ly. The
system checks thetir epr essur eand thetir e
te mp eratur eof thetir es installed ontheve hicle
by means ofatir epr essu resensor .
The tirepr essur eand thetir ete mp eratur e
appear intheon- boar dcom puter(/ page302). If
th er eis asubs tantia lpr ess ureloss orifth e
tir ete mp eratur eis exc essiv e,youwill bewarned
in thefo llo wing ways:
R viadisp lay messa ges(/ page380).
R viathe0077 warning lam pin theins trument
clus ter(/ page399)
The tirepr essu remonit oring system isonl yan
aid. Itis thedr iver's responsibili tyto setth etir e
pr essur eto there comme ndedcoldtirepr ess ure
su itab leforth eoper ating situation .
In mos tcases, thetir epr essur emonit oring sys‐
te m wil lau tomatical lyupd ateth ene wrefere nce
va lues afte ryo uha ve chang edthetir epr essur e.
Yo ucan ,ho we ver,also updat eth ere fere nce val‐
ues byrestar tin gth etir epr essur emonit oring
sy stem manuall y(/ page399).
Sy stem limit s
The system maybe impair edorma yno tfunc tion
par ticular lyin thefo llo wing situat ions:
R The tirepr essur ehas been setinc orrectly
R Sud den press urelos scau sed byafo re ign
obje ctpene tratin gth etir e, forex am ple Whee
lsand tires 30
1

of
skidding andhydroplaning onwetro ads is
inc reased.
In addit ion,th etir egr ip isgreatl yre duced at
a low outside temp eratur eand tireru nning
te mp eratur e. #
Switc hon theES P®
and adap tyo ur
dr ivin gst yle accor dingly. #
Use 004D M+Stires atoutside temp er‐
atur esofless than 50 °F(10 °C) . #
Onlyuse thetir es forth eir intended pur‐
pose. Obser
vethefo llo wing when selecting,ins talling
and replacing tires:
R Further mor e,theuse ofcer tain tiretypes in
cer tain regions andareas ofoper ation can
be highl ybenef icial.
R Onlyuse tires and wheels ofthesame type
(summer tires, wint ertires, MOEx tende d
tir es) and thesame make.
R Onlyins tallwheels ofthesame sizeonone
axle (leftand right). It
is onl yper missible toins talla dif fere nt
wh eelsi ze intheeve ntofaflat tirein order
to drive to thespecialis two rkshop.
R Vehicl eswith atir epr ess uremonit oring
sy stem: Allinstalled wheels mustbe equip‐
ped withfunc tioningsensorsfo rth etir e
pr essur emonit oring system.
R Attemp eratur esbelo w45 °F(7°C) use win‐
te rtir es orall-seaso ntir es mar ked004D M+S
fo rall whee ls.
Wi nter tires prov ide thebes tpossible grip in
wintr yro ad con dition s.
R For004D M+Stires, only usetires wit hth e
same tread.
R Obser vethemaximum permissible speedfor
th e004D M+Stires installed.
If th etir e's maximum speedisbelo wthat of
th eve hicle, this mus tbe indic ated byan
appr opriatelabel inthedr iver's field of
vision.
R Break inne wtires atmoder atespeeds for
th efirs t60 miles(1 00 km) . R
Replace thetir es afte rsix yearsat thelat est,
re ga rdless ofwe ar.
R Wh enreplac ingwith tires that donotfe a‐
tur eru n-f lat charact eristics :ve hicles with
MOExt ended tires areno teq uipped witha
TIREFIT kitatthefa ct or y. Eq uip th eve hicle
wit haTIREFIT kitafte rre placing withtir es
th at do notfe atur eru n-f latch aract eristic s,
e.g .wint ertires.
Fo rmor einf ormation onwhee lsand tires, con‐
ta ct aqu alif ied spec ialistwo rkshop.
Be sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page29 7)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page30 4)
R Tire size designation, load-bearing cap acity,
spe edrating andload index(/ pag e31 1)
R Tire pressur eta ble (/ page299)
R Noteson theemer gency sparewheel
(/ page32 5) 31
8
Wheels andtires

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
: Autom aticHeadlamp Mode
Inoperat ive *T
helight sensor ismalfunctionin g. #
Consult aqu alif ied spec ialistwo rkshop.
: Act ive Headla mpsInopera-
tive *T
heactiv eheadla mpsar emalfunctioning. #
Consult aqu alif ied spec ialistwo rkshop.
: Switch OnHeadla mps *Y
ouaredr iving without low- beam headlam ps. #
Turn thelight switc hto the0058 or0058 position .
:
Switc hOff Lights *Y
ouarelea ving theve hicle andthelights arest ill switc hedon. #
Turn thelight switc hto the0058 position . Displa
ymessag esand warning/ indic ator lam ps 34
7

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
Act ive Lane Keeping Assist
Currently Unavailable See
Operator' sManual *A
ctiveLane Keeping Assistis temp orarily una vailable.
The ambien tcon dition sar eouts idethesy stem limits (/page19 4).
As soo nas theambient conditions arewit hin thesy stem limits, thesy stem will become available again. #
Drive on .
Ac tiveLan eKeep ingAssist
In oper ative *A
ctiveLane Keeping Assistis malfunct ioning. #
Consult aqu alif ied spec ialistwo rkshop.
ç
00B0
00C7
¸ Currently Unavailable
Rada rSensors Dirty *T
heradar sensor system ismalfunct ioning.Possible causes:
R Dirton thesensor s
R Hea vyrain or sno w
R Extende dcou ntrydr ivi ng without other traf fic, e.g. inthedeser t
Dr iving systems anddriving safetysy stems maybe malfunct ioningortemp orarily una vailable.
Onc eth ecause ofthepr oblem isno long erpresent ,th edr iving systems anddriving safetysy stems willbeavailable
ag ain.
If th edispla ymessag edoes notdisappear : #
Pull overand stop theve hicle safely assoon aspossible, paying attention toroad and traf fic condi tions. #
Clea nallsenso rs(/ pag e27 2). #
Restar tth eengine. 368
Displa ymessag esand warning/ indic ator lam ps

Ti
re pres sur emoni tor Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
Tire Press. MonitorCur-
rent lyUnavailable *T
her eis int erfere nce from apo we rful radio signal sourceAs are sult, nosignals from thetir epr essur esensor sar e
being recei ved. The tirepr essur emonit oring system istemp orarily una vailable.
The tirepr essur emon itor ing system will restar taut omat icallyas soon asthecause hasbeen rectif ied. #
Drive on.
Tir ePre ss. Moni torInope ra-
tive *T
hetirepr essur emonit oring system ismalfunct ioning. &
WARNIN GThe reisarisk ofan accident ifth etir epr essur emonit oring system ismalfunct ioning
The tirepr essur emonit oring system cann otissue awa rning ifth er eis pressur eloss inone ormor eof thetir es.
Ti re swit hinsuf ficie nttirepr ess urema yim pa irth edr iving charact eristic sas wellas steer ing and braking. #
Have thetir epr essur emonit oring system checkedat aqu alif ied spec ialistwo rkshop. Tire
Pressure MonitorInop-
erative NoWheel Sensors *T
hewheels installed donotha ve suit able tirepr essur esensor s.The tirepr essur emonit oring system isdeactiv ated. #
Installwheels withsuit able tirepr essur esen sors.
0077 Wheel Sensor(s )Missin g *T
her eis no signal from thetir epr essur esensor sof one ormor ewheels. Nopressur eva lue isdispla yedfo rth e
af fect ed tire. #
Have thefa ulty tirepr ess uresen sor replaced ataqu alif ied spec ialistwo rkshop. 380
Displa ymessag esand warning/ indic ator lam ps

Engine
Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
ÿ Coolant warning lam p(red) *T
he redcoolant warning lam pis lit while theengine isrunning .
Po ssible causes:
R The temp eratur esensor ismalfunct ioning
R The coolant leve lis toolow
R The airsuppl yto thera diat orisobs truct ed
R The radiat orfanis faulty
R The engin eco olan tpum pis faulty
If th er eis an additional warning tone, thecoolant temp eratur ehas exceeded themaximum permissible temp eratur e. &
WA RNIN GDang erofburnswhen opening thehood
If yo uopen thehood when theengine hasoverheat edordur ing afire intheengine compartmen t,yo uco uld
co me intoco ntact withho tga ses orother escaping operating fluids. #
Beforeopen ingthehood, allowtheengine tocool down. #
Intheeve ntofafire intheengine compartmen t,ke ep thehood closed andcallthefire ser vice. #
Stop theve hicle immediat elyinaccor dance withth etraf fic condi tions andswitchof fth eengine. Donotcon tinue
dr iving under anycir cums tances. #
Notethemessag eson themultifunc tiondispla y. 390
Displa ymessag esand warning/ indic ator lam ps

Wa
rning/indicat orlam p
Possible causes/conseq uencesand0050 0050
Solutions
If th ecoolant temp eratur edispla yis at thelowe rend ofthete mp eratur escale: #
Consult aqu alif ied spec ialistwo rkshop.
If th ecoolant temp eratur edispla yis at theupper endofthete mp eratur escale: #
Exitth eve hicle andkeep asaf edis tance from itunti lth eengine hascooled down. #
Chec kth ecoolant leve l(/ page268) . #
Mak esur eth at theair supply tothera diat orisno tobs truct ed. #
Avoiding highloads ontheengine, drive to thenear estqu alif ied spec ialistwo rkshop. Indoing so,ensur eth at the
cool anttemp eratur edispla yre mains belowthere dar ea.
ÿ Coolant warning lam p(yel‐
lo w) *T
he yello wcoolan twa rning lam pis lit while theengine isrunning .
Po ssible causes:
R The temp eratur esensor ismalfunct ioning
R The charge air,tr ans miss ionoilorbat tery cool ingisfaulty #
Avoiding highloads ontheengine, drive to thenear estqu alif ied spec ialistwo rkshop.
00B9
Engine diagnosis warning
lam p *T
he yello wChec kEn gine warning lam pis lit while theengine isrunning .
A ma lfunctio nha soccu rred intheengine, theex haus tsy stem orthefuel system.
The emission limitvalues maybe exc eeded andtheengine maybe inemer gency mod e.
In som est at es, legalrequ iremen tsstipulat eth at youmus timm ediat elyco nsult aqu alif ied spec ialistwo rkshop as
soon astheye llo wChec kEn gine warning lam plight sup. Disp
lay mess ages and warning/ indic ator lam ps 39
1