2020 MERCEDES-BENZ CLS Owners Manual

R
Allelectr icalconsu mersar esw itched off.
R The igniti onissw itched off.
The electr icalfu ses arelocat edinvarious fuse
bo xes:
R Fuse boxin theengine compartmen ton the
dr iver's side (/page39 1)
R Fuse boxon thedr iver's side ofthecoc kpit
(/ page392)
R Fuse boxin thefront passeng erfoot we ll
(/ page392)
R Fuse boxin thetrunk ontheright- hand side
of theve hicle, when viewe din thedir ect ion
of tra vel(/ page392 ) Opening
andclosing thefus ebo xin the
engine compartmen t Re
quirement s:
R Adr yclo thand asc rewdr iver areav ailable.
Obse rveth eno teson electr icalfuses
(/ page390). Opening &
WARNIN GRisk ofinju ryfrom using the
winds hieldwiper swhile theengine hood
is open
When theengine hoodisopen andthewind‐
shield wipersar ese tin mo tion ,yo ucan be
trapped bythewiper linkage. #
Alw aysswitc hof fth ewindshield wipers
and ignition beforeopening theengine
hood. #
Turn clips 2 oncover1 count er-cloc kwise
a qu arter-tur n. #
Pullco ver1 upw ards inthedir ect ion ofthe
ar row . Br
ea kdo wnassista nce 39
1

#
Remo veanyex istin gmois turefrom thefuse
bo xusing adr yclo th. #
Loosen screws4, remo vefuse boxlid 3
fr om theto p.
Closing #
Chec kwhe ther theseal isposition edcor‐
re ctly inlid 3. #
Inser tlid 3 intoth ebr ac ketat there ar of
th efuse box. #
Folddo wn lid3 ofthefuse boxand tight en
scr ews4. #
Inser tco ver1 onboth sides. #
Turn clips 2 oncover1 cloc kwise aqu ar‐
te r-tur n. #
Close thehood. Opening
andclosing thefus ebo xin the
coc kpit The
fuse boxis on theside ofthedashboar d
under aco ver. #
Con tact an author ized Mercedes-B enzCen‐
te rfo rfur ther information . Opening
andclosing thefus ebo xin thefront
pa sseng erfoot we ll Obser
vetheno teson electr icalfuses
(/ page390). #
Open cover1 inthedir ect ion ofthear row
and remo veit. Opening
andclosing thefus ebo xin the
tr unk Obser
vetheno teson electr icalfuses
(/ page390). 392
Breakdo wnassis tance

#
Foldcover1 down inthedir ect ion ofthe
ar row .
The fuse assignment diagramisin are cess on
th eside ofthefuse box. Br
eakdo wnassis tance 39
3

No
teson noise orunusua lhand lingcharac‐
te rist ics
While driving ,pa yatt ent ion tovibr ations, noises
and unusu alhandl ingcharact eristic s,e.g .pullin g
to one side. Thismayindicat eth at thewheels or
tir es aredamag ed.Ifyo ususpe ctthat atir eis
def ective, reduce your spee dimm ediat ely. Stop
th eve hicle assoon aspossible tocheckth e
wheels andtires fordama ge.Hid den tireda m‐
ag ecou ldalso be cau sing theunusual handling
ch aract eristic s.Ifyo ufind nosigns ofdamag e,
ha ve thetir es and wheels checkedat aqu alif ied
spec ialistwo rkshop. No
teson regular lyinspect ingwheels and
tir es &
WARNIN GRisk ofacci dent from dam‐
ag ed tires
Dama gedtir es can cause tirepr essur eloss.
As are sult, youco uld lose contro lof your
ve hicle. #
Chec kth etir es regular lyforsigns of
dama geand replace anydamag edtires
immediat ely. &
WARNIN GRisk ofaquaplani ng dueto
insuf ficie nttiretrea d
Insu fficien ttir etread willresult inreduced
tir egr ip. The tiretread isno long erable to
dissipat ewa ter.
This means that inhea vyrain or slush the
ri sk ofhydroplaning isincr eased, inpar ticu‐
lar ifve hicle speed isno tadap tedto suit the
condi tions.
If th etir epr essur eis toohigh ortoolow,
tir es ma yex hibit differe nt leve ls of we arat
dif fere nt locati ons onthetir econ tact sur‐
fa ce. #
Thu s,yo usho uld regular lych eckth e
tr ea dde pthand thecon dition ofthetir e
con tact surface across theent ire widt h
of all tires. Minimum
tread depthfor:
R Summ ertires: 00CEin(3 mm)
R M+S tires: 00CFin(4 mm) #
Forsaf etyre ason s,replace thetir es
bef oreth eleg ally prescr ibed limit for
th eminimum tread depthisreac hed. Car
ryout thefo llo wing checks on allwheels reg‐
ular ly,at leas tonce amont hor as requ ired, e.g.
pr ior toalon gjo ur ne yor drivin gof f-ro ad:
R Chec kth etir epr essur e(/ page396).
R Visual lyinspect wheelsandtires fordama ge.
R Chec kth eva lve caps.
The valves mus tbe protect edagains tmois‐
tur eand dirtby theva lve caps approved
especiall yfo ryo ur vehicle byMer cedes-Ben z.
R Visual checkof thetir etread depthand the
tir econt actsurface across theent ire widt h.
The minimum tread depthforsummer tires is
00CE in(3 mm) andforwint ertires 00CF in
(4 mm). 39
4
Wheel sand tires

Six
mar ks1 showwher eth ebar indicat ors
(ar row )ar eint egr ated intoth etir etread. They
ar evisible onceatread depthofappr oximat ely
00CD in(1.6 mm) hasbeen reac hed. No
teson sno wch ains &
WARNIN GRisk ofacci dent dueto inc or‐
re ct mou nting ofsno wch ains
If yo uha ve mount edsno wch ains tothefront
wheels, thesno wch ains maydr ag agains t
th eve hicle body orchassis components. This
couldcaus edamag eto theve hicle or
th etir es. #
Nevermount snowch ains onthefront
wheels. #
Onlymount snowch ains onthere ar
wheels inpair s. *
NO
TEDama getothewheel trim from
mount edsno wch ains If
sn ow chains aremoun tedto steel wheels,
th ewheel trims can bedamag ed. #
Remo vethewheel trims ofsteel wheels
bef oremount ingsnowch ains . Obse
rveth efo llo wing noteswhen usingsnow
ch ains :
R Snow chains areon lype rm issible forcer tain
wheel/t ire com binat ions.Yo ucan obtain
inf ormat ionabout this from anaut hor ized
Mer cedes -Benz Cent er.
R Forsaf etyre ason s,on lyuse snow chains that
ha ve been specif icallyapproved foryo ur ve
hicle byMer cedes-Ben z,or sno wch ains
wit hth esame qualit yst andar d.
R Ifsn ow chains aremoun ted, themaximum
per missible speedis30 mph(50 km/h).
R Vehicl eswith Activ ePa rking Assis t:Do
no tuse ActivePa rking Assistwhen snow
ch ains aremoun ted.
R Vehicl eswith leve lcontr ol:Ifsno wch ains
ar emoun ted, onl ydr ive at raised vehicle
le ve l.
% Youcan deac tivateES P®
to pull away
( / pag e17 8). This allo ws thewheels to
spin, achie ving anincr eased driving forc e. Wheels
andtires 395

Ti
re pres sur e No
teson tirepr essur e &
WARNIN GRisk ofacci dent dueto insuf ‐
fi cie ntor excess ive tir epr ess ure
Under inflate dor ove rinf late dtir es pose the
fo llo wing risk s:
R The tires ma ybur st,especiall yas the
load andvehicle speed increase.
R The tires ma ywe arexc essiv elyand/or
une venly, whic hma ygr ea tly impair tire
traction .
R The drivin gch aract eristic s,as wellas
st eer ing and braking, maybe greatl y
im pair ed. #
Com plywithth ere comme ndedtire
pr ess ureand checkth etir epr essur eof
all tires including thespar ewheel regu‐
lar ly:
R atleas tonce amont h
R when theload chang es R
beforeembar kingon alon gerjour ney
R ifoper ating conditions chang e,e.g .of f-
ro ad drivin g #
Adjus tth etir epr essur eas neces sary. Ti
re pressur ewhic his toohigh ortoolow can:
R Shor tenth eser vice life of thetir es.
R Cause increased tiredamag e.
R Adversely affect drivi ng charact eristic sand
th us drivin gsaf ety, e.g. due tohydroplaning. &
WARNIN GRisk ofan acci dent dueto
insuf ficie nttirepr ess ure
Ti re swit hpr essur eth at istoolow can over‐
heat andburstas are sult.
In addition, they also sufferfr om excessiv e
and/or irre gular wear,whic hcan significan tly
im pair thebr aking proper tiesand thehan‐
dling charact eristic s. #
Avoid excessiv elylow tirepr essur esin
all thetir es, including thespar ewheel. Ti
re pressur ewhic his toolow can cause:
R Tire def ectsas are sult ofove rheating.
R Impair edhandling charact eristic s.
R Irre gular wear.
R Incr eased fuelconsum ption. &
WARNIN GRisk ofacci dent from exces‐
siv etir epr essur e
Ti re swit hexc essiv elyhigh pressur ecan
bur stbecause they aredamag edmor eeasil y
by highw ayfill, po tholes etc.
In addition, they also sufferfr om irre gular
we ar,whic hcan significan tly im pair thebr ak‐
ing proper tiesand thehandling charact eris‐
tic s. #
Avoid excessiv elyhigh tirepr essur esin
all thetir es, including thespar ewheel. Ti
re pressur ewhic his toohigh cancause:
R Increased brakin gdis tance.
R Impaired handl ing charact eristic s.
R Irre gular wear. 396
Wheelsand tires

R
Impai reddr iving comfort.
R Suscep tibilitytodamag e. &
WARNIN GRisk ofacci dent caused by
re peat eddrop intirepr essur e
If th etir epr essur edr ops repeat edly,th e
wheel, valve or tirema ybe damag ed.
Insuf ficie nttirepr ess urecan causethetir es
to bur st. #
Inspect thetir efo rsigns offore ign
obje cts. #
Chec kwhe ther thewheel orvalve has a
leak . #
Ifyo uar eunab leto rectify thedamag e,
con tact aqu alif ied spec ialistwo rkshop. Yo
ucan find informa tionon tirepr ess urefo rth e
ve hicle's fact or y-ins talled tires on thefo llo wing
labels:
R Tire and Loadi ngInfo rm atio nplacar don the
B‑pil larof your vehicle (/page403).
R Tire pressur eta ble ontheinside ofthefuel
fi ller flap (/ page39 7). Obse
rveth emaximum tirepr essur e
(/ page409).
Use asuit able pressur ega ug eto checkth etir e
pr essur e.The outerappear anceofatir edoes
no tper mit anyre liable conclusion aboutthetir e
pr essur e.
Ve hicl eswith atir epr ess uremonit oring sys‐
te m: Youcan also checkth etir epr essur eusing
th eon- board computer.
Onl ycor rect tirepr ess urewhe nth etir es are
cold. Condition sfo rcold tires:
R The vehicle hasbeen parkedwit hth etir es
out ofdir ect sunlight forat lea stthre ehour s.
R The vehicle hastrave led less than 1mile
(1 .6 km ).
A rise inthetir ete mp eratur eof 18 °F(10 °C)
incr eases thetir epr essur eby appr ox.10 kPa
(0. 1ba r/1 .5psi ).Ta ke this int oacc ount when
ch ecking thetir epr essur eof wa rm tires .
Th etir epr es su re recomme ndedforincr ease d
loa d/spee din thetir epr essur eta ble can affect
th eride comf ort. &
WARNIN GRisk ofacci dent dueto
uns uitable accessories ontireva lve
If yo umoun tuns uitable accessories onto tire
va lves, thetir eva lves ma ybe ove rloaded and
malfunct ion,whic hcan cause aloss oftire
pr essur e.Afterm arke ttir epr es su re monit or‐
ing systems willcause thetir eva lve to
re main open, depending onthedesign. This
can also result inaloss oftirepr essur e. #
Onlyscr ew standar dva lve caps orvalve
cap sspe cifica llyapprove dby
Mer cedes-Ben zfo ryo ur vehicle onto
th etir eva lve. Ti
re pres sur etab le The
tirepr ess ureta ble ison theinside ofthe
fuel filler flap.
% The datasho wnintheimag esisexam ple
dat a. Whee
lsand tires 39
7

The
tirepr essur eta ble showsthere comme nded
tir epr ess urefo rall tires app rove dfo rth is vehi‐
cle. The recomme ndedtirepr ess ures apply for
cold tires und ervarious oper ating condit ions,i.e.
loading and/orspeedoftheve hicle.
If one ormor etir esizes precede atir epr essur e,
th etir epr essur einf ormation follo wing isonl y
va lid forth ose tiresizes.
The load condit ions"partially laden" and"fully
laden" aredef ined intheta ble fordif fere nt num ‐
be rs of passeng ersand amounts oflugg age. The
actual number ofseats maydif ferfr om this. Som
etir epr essur eta bles onlysho wtherim
diame terins tead ofthecom pletetiresize, e.g.
R1 8.The rim dia me teris par tof thetir esize and
can befound onthetir eside wall(/ page41 0).
Be sureto also obse rveth efo llo wing further
re lat ed subje cts:
R Noteson tirepr essur e(/ page396)
R Tire and Loadi ngInfo rm atio nplacar d
(/ page40 3) R
Max imum tirepr essur e(/ page40 9) Chec
kingtirepr essu resmanu ally #
Read thetir epr essur efo rth ecur rent operat‐
ing cond itions from theTire and Loadi ng
In fo rm atio nplacar dor thetir epr essur e
ta ble. Obser vetheno teson tirepr essur e. #
Remo vetheva lve cap ofthetir eto be
ch ecked. #
Press thetir epr essur ega ug esec urelyon to
th eva lve. #
Read thetir epr essur e. #
Ifth etir epr essur eis lowe rth an there com‐
mend edvalue, increase thetir epr essur eto
th ere comme ndedvalue. #
Ifth etir epr essur eis higher than there com‐
mend edvalue, release air.To do so, press
do wn theme talpin intheva lve, e.g. using
th etip ofapen forex am ple. Then checkth e
tir epr es su re again usin gth etir epr essur e
ga ug e. #
Screw theva lve cap ontoth eva lve. 398
Wheels andtires