2021 MERCEDES-BENZ CLS ECO mode

Ke
ep childr enaway. Obser
vethis Opera tor's Manua l.
Obser vethefo llo wing ifyo udo notint endto use
th eve hicle overan extende dpe riod oftime:
R Activatest andb ymode .
R Alternat ivel y: con nectth ebatt eryto abat ‐
te ry charge rapp rove dby Mer cedes-Ben zor
consult aqu alif ied spec ialistwo rkshop to
discon nectth ebatt ery. No
teson star ting assistance andchargin g
th e12 Vbatt ery Ve
hicl eswith alithium-ion battery
When chargin gth ebatt eryand during star tin g
assis tance, alwa ys use thejum p-startconne c‐
tio npo int intheengine compartmen t. *
NO
TEDama getothebatt eryfrom over‐
vo ltag e When
chargin gusin gabat tery charge rwit h‐
out amaximu mchargin gvo ltag e, thebatt ery
or theon- boar delectr onics maybe damag ed. #
Onlyuse batterych arge rs wit hamax i‐
mum chargin gvo ltag eof 14.8 V. All
other vehicl es
When chargin gth ebatt eryand during star tin g
assis tance, alwa ys use thejum p-start connec‐
tion pointintheengine compartmen t.
* NO
TEDama getothebatt eryfrom over‐
vo ltag e When
chargin gusin gabat tery charge rwit h‐
out amaximu mchargin gvo ltag e, thebatt ery
or theon- boar delectr onics maybe damag ed. #
Onlyuse batterych arge rs wit hamax i‐
mum chargin gvo ltag eof 14.8 V. &
WARNIN GRisk ofexplosion from hydro‐
ge nga signiting
Ther eis adang erofhydrog en gasigniting
when chargin gth ebatt eryif th er eis ashor t
cir cuit orspar ksstar tto form . #
Mak esur eth at thepositiv ete rm inal of
th econ nect edbatt erydoes notcome
int ocon tact with vehicle parts. #
Neverpla ceme talobje ctsor tools ona
batt ery. #
The descr ibedorder ofthebatt ery
clam psmus tbe obser vedwhen con‐
nec tingand discon nectingth ebatt ery. #
When giving star tin gassis tance, alwa ys
mak esur eth at youon lyconnect bat‐
te ry term inals withident icalpolar ity. #
Dur ing star tin gassis tance, youmus t
obse rveth edescr ibedorder forcon‐
necting anddisconnecting thejum per
cable. #
Donotcon nect ordiscon nectthebat‐
te ry cla mp swhile theengine isrunning . Br
ea kdo wnassist anc e285

Ne
verexc eed maximum tirepr essur e1 speci‐
fi ed forth etir e. Alw aysobser vethere comme n‐
ded tirepr ess urefo ryo ur vehicle when adjusting
th etir epr essur e(/ page299). Inf
ormat ionontirech aract eristics %
The datasho wnintheimag eis exam ple
dat a.
This informat iondesc ribes thetype oftirecor d
and thenumber oflaye rs inside wall1 and
under tiretread 2. Ti
re size designation, load-bearingcapacity ,
speed ratin gand load inde x &
WARNIN GRisk ofinju rythro ugh exceed‐
ing thespecif iedtireload-bear ingcapa‐
city ortheper missible speedrating
Ex cee ding thespecif iedtireload rating or
th eper missible speedrating mayle ad totire
da ma geand tothetir es bur sting. #
Ther efor e, onl yuse tiretypes andsizes
appr ovedfo ryo ur vehicle model. #
Obser vethetir eload rating andspee d
ra ting requ ired foryo ur vehicle. 1
Firstletter(s)
2 Nomin altirewidt hin millime ters
3 Aspe ctratio in%
4 Tire code
5 Rim diame ter
6 Load-be aring inde x
7 Speed rating
8 Loadind ex
% The datasho wnintheillus tration isexam ple
dat a.
In fo rm atio nabout readin gtir edat acan be
obt aine dfrom anyqu alif ied spec ialistwo rkshop. Wheels
andtires 31
1

Cha
nging awheel No
teson selecting, installing andreplac ing
tir es *
NO
TEMercede s-AMG vehicles #
Obser vetheno tesin theSupplement .
Yo uco uld other wise failto recogni ze
da ngers. &
WARNIN GRisk ofacci dent dueto inc or‐
re ct dimensi onsofwhe elsand tires
If whe elsand tires ofthewr ong size are
ins talled, thewheel brak es orwheel suspen‐
sion componen tsma ybe damag ed. #
Alw aysre place wheels andtires wit h
th ose that fulf illthespecif ication sof
th eor iginal part.
When replacing wheels, makesur eto fit th e
cor rect:
R Desi gnati on
R Mod el Whe
nre placing tires, mak esur eto ins tallth e
cor rect:
R Desi gnati on
R Manuf actu rer
R Model &
WARNIN GRisk ofinju rythro ugh exceed‐
ing thespecif iedtireload-bear ingcapa‐
city ortheper missible speedrating
Ex cee ding thespecif iedtireload rating or
th eper missible speedrating mayle ad totire
da ma geand tothetir es bur sting. #
Ther efor e, onl yuse tiretypes andsizes
appr ovedfo ryo ur vehicle model. #
Obser vethetir eload rating andspee d
ra ting requ ired foryo ur vehicle. *
NO
TEVehicle andtiredamag eth ro ugh
tir etyp esand sizes that have notbe en
ap prove d Fo
rsaf etyre ason s,on lyuse tires, wheel s
and accessories whic hha ve been speciall y
appr ovedby Mer cedes-Ben zfo ryo ur vehicle.
These tires arespecially adaptedto thecon ‐
tr ol systems, suchas ABS ,ES P®
and
4MA TIC,andmarkedas follo ws :
R MO =Mer cedes-Ben zOr iginal
R MOE =Mer cedes-Ben zOr iginal Extended
(r un-f lattireonl yfo rcer tain wheels)
R MO1 =Mer cedes -Benz Original (onlycer ‐
ta in AMG tires)
Cer tain charact eristic s,suc has han dling,
ve hicle noise emissions, consumption, etc.
ma yot her wise beadv ersely affect ed. Fur‐
th er mor e,other tiresizes could result inthe
tir es rubbing agains tth ebody andaxle com‐
ponen tswhen loaded. Thiscould result in
damag eto thetir eor theve hicle. 31
6
Wheels andtires

*
NO
TEPrema ture enginewearthro ugh
unle aded regular gasoline Im
pair ment ofthelong evity and perform anc e
of theengine.
If unleaded premium grade gasoline is
una vailable andyouha ve torefuel using
unle adedre gular gasoline: #
Onlyfill th efuel tank tohalf fullwith
unleaded regular gasoline andrefill as
soon aspossible withunleaded pre‐
mium grade gasoline. #
Donotdr ive at themaximum design
speed. #
Avoid sudden accelerationandengine
speeds over3000 rpm. Fu
rther information onfuel isavailable atthefo l‐
lo wing locations:
R Ataga sst atio n
R Ataqu alif ied spec ialistwo rkshop
R Onthehtt ps:/ /www .mbusa.c om(USAonl y) No
teson add itivesingasoline
Obser vetheno teson oper ating fluids
(/ page33 1).
* NO
TEDama gefrom use ofunsu itabl e
add itives Ev
en smal lamou ntsofthewr ong additiv e
ma ylead tomalfu nctions occurring. #
Only addcle ani ng additiv es recomme n‐
ded byMer cedes-Ben zto thefuel. Mer
cedes- Benzrecomme ndsthat youuse
br and -name fuels withaddit ives.
In som eco unt ries, thefuel available mayno t
ha ve suf ficie ntadditiv es. Residue could buildup
in thefuel injec tionsystem asare sult. Inthis
case, incon sult ation withan aut hor ized
Mer cedes -Benz Cent er,mix thefuel withth e
cle ani ng additiv ere comme ndedbyMer cedes-
Benz .Obser vetheno tesand mixing ratio sind i‐
cat edon theta nk . Ta
nk cont entand reser vefuel Model
Total cap acity
Al lmo dels 21.1ga l(80. 0liter s) Model
Ofwhic hre ser ve
All mod els3 .2gal(1 2. 0liter s) Engine
oil No
teson engine oil
Obser vetheno teson oper ating fluids
(/ page33 1). Te
ch nica lda ta 333

*
NO
TEEngi nedama gecau sed byan
inc orrect oil filt er ,inc orrect oil oraddi‐
tiv es #
Donotus eengi neoilsor oil filt er sot her
th an those whic hmee tth especif ica‐
tion sneces saryfo rth epr escr ibed
ser vice interva ls. #
Donotalt er theengine oiloroil filt er in
or der toachie velong erchang eint erva ls
th an presc ribed. #
Donotuse additiv es. #
Have theengine oilchang edafte rth e
pr escr ibed interva ls. Mer
cedes -Benz recomme ndsthat youha ve the
oil chang ecar ried out ataqu alif ied spec ialist
wo rkshop. Quality
andcapacity ofengine oil Gasoline
enginesM B-Freigabe orMB-
Appr oval
All mode ls 229.51,229.52,
229.6 1
229.7 1* *
Re comme ndedforlo we stpossible fuelcon‐
sum ption (lowe stSA Evis cos ityclassineach
case ;obs erve possible restrictions ofthe
appr ovedSA Evis cos ityclasse s).
To achie vethelowe stpossible fuelconsum ption,
it is recomme ndedtouse theengine oilspecif i‐
cation smar kedin theta ble forth elowe stSA E
viscosi tyclass .Po ssible restrictions ofthe
appr ovedSA Evis cos ityclasse smu stbe
obser ved.
The follo wing values referto an oilchang e,
inc ludin gth eoil filt er . Model
Capacity
CL S450 10.0 US qt(9.5 lite rs)
CL S45 04MA TIC 9.0US qt(8.5liter s) No
teson brak efluid Obser
vetheno teson oper ating fluids
(/ page33 1). &
WARNIN GRisk ofan acci dent dueto
va por pockets form ing inthebr ak esy s‐
te m
The brak efluid constantly absor bsmoi stur e
fr om theair .This lowe rstheboiling pointof
th ebr ak efluid. Ifth eboiling pointistoolow,
va por pockets ma yfo rm inthebr ak esy stem
when thebr ak es areapplied hard.
This causes thebr aking effect to be
im pair ed. #
Have thebr ak efluid rene we dat the
specif iedinterva ls. 33
4
Tech nica lda ta

Ha
ve thebr ak efluid regular lyreplaced ata
qu alif ied spec ialistwo rkshop.
Onl yuse abr ak efluid appr ovedby Mer cedes-
Benz accor dingtoMB-F reigabe orMB- Appr oval
33 1.0. Co
olan t No
teson coolant
Obser vetheno teson oper ating fluids
(/ page33 1). &
WARNIN G‑Ri sk offire and injuryfrom
ant ifreez e
If ant ifreez ecom esintocon tact with hot
com ponent partsintheengine compart‐
ment ,it ma yignit e. #
Allo wtheengine tocool down before
ad ding anti freeze . #
Makesur eth at no ant ifreez espills out
ne xt to thefiller open ing. #
Thor oughl yclean offan yant ifreeze
fr om com pone ntpar tsbef orest ar tin g
th eve hicle. *
NO
TEDama gecau sed byinc orrect cool ‐
ant #
Onlyus ecool antthat has been pre‐
mix edwithth ere qu ired ant ifreeze pro‐
te ction.
Inf ormati ononcool antisavailable atthefo l‐
lo wing locations:
R IntheMer cedes- BenzSpecif ication sfo r
Oper ating Fluids 310.1
- Athttps: //bevo.mer cedes-b enz.com
- IntheMer cedes- BenzBeVoapp
R Ataqu alif ied spec ialistwo rkshop *
NO
TEOverhea ting athigh outsid ete m‐
per atur es If
an inapp ropr iat ecoolant isused, the
engine cooling system isno tsuf ficie ntlypr o‐
te cted agains tov erheating andcorrosion at
high outside temp eratur es. #
Alw aysuse coolant approvedby
Mer cedes-Ben z. #
Obser vetheins truction sin the
Mer cedes-Ben zSpecif ications forOper‐
ating Fluids310.1. Ha
ve thecoolant regular lyreplaced ataqu alif ied
spec ialistwo rkshop.
Pr opor tionofantifr eezeconcen trat ein the
engine cooling system:
R Aminimum of50% (antifr eezeprotect ion
do wn toappr oximat ely-3 5°F (-37°C))
R Amaxim umof55% (antifreeze protect ion
do wn to-49°F (-45°C))
Co olant capacity Mode
lC apacity
All mode ls 13.7 US qt
(1 3.0 lite rs) No
teson windshield washer fluid Obser
vetheno teson oper ating fluids
(/ page33 1). Te
ch nica lda ta 335

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
ç Suspended *I
fyo udepr esstheaccelera torpeda lbe yond theAc tiveDis tance AssistDIS TRONI Cse tting ,th esy stem will switc h
to passiv emode (/page17 1).
ç Of f *A
ctiv eDis tan ceAssi stDIS TRONI Cwa sdeactiv ated. Ifawa rning tone also sou nds, ActiveDis tance Assist
DIS TRONI Cha sde acti vatedaut omatic ally(/ page17 3).
Active Distance AssistCu r-
rentl yUna vailab leSee
Ope rator' sMa nua l *A
ctiveDis tan ceAssi stDIS TRONI Cis temp orarily una vailable.
The ambien tcon dition sar eouts idethesy stem limits (/page17 1).
As soo nas theambient conditions arewit hin thesy stem limits, thesy stem will become available again. #
Drive on .
Ac tiveDis tan ceAssist Inop-
erat ive *A
ctiveDis tan ceAssi stDIS TRONI Cis ma lfunctio ning.
Ot he rdr ivi ng systems anddriving safetysy stems mayalso bemalfunct ioning. #
Consult aqu alif ied spec ialistwo rkshop.
Act ive Distance AssistNow
Availabl e *A
ctiveDis tan ceAssi stDIS TRONI Cis op erati ona lag ain. #
Swi tchon ActiveDis tance AssistDIS TRONI C(/ page 173). 36
4
Displ aymessa gesand warning/ indic ator lam ps

Ac
tiv eSte ering Assis t.............................1 78
Ac tivati ng/d eactiv ating ........... ............180
Ac tiveEmerg encyStop Assis t.............1 80
Ac tiveLa ne Chang eAssi st<0011001100110011001100110011001100110011001100110011001100110011
001100110011> 181
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011>178
Sy stem limits ....................................... 178
Ac tiv eTr af fic Jam Assis t
Ac tivati ng/d eactiv ating ........... ............178
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
00110011001100110011>177
Ad aptiv ecr uise contr ol
see ActiveDis tance AssistDIS TRONI C
Ad aptiv eHighb eamAssist
Fu nctio n<0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011001100110011> <0011001100110011001100110011001100110011001100110011001100110011
001100110011001100110011>117
Swi tching on/of f<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
00110011> 118
Ad diti ves.................................................. 333
En gine oil............................................ 333
Fu el ..................................................... 333
Ad diti ves(engine oil)
see Additiv es
Ad diti ves(fuel)
see Fuel
ADS PLUS dam ping system
see AIR BO DY CONTR OL Af
ter-sales service center
see ASSYSTPL US
Air bag
Re duced protect ion ...............................4 3
AIR BODY CONT ROL................................ 196
Se tting <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011> 197
Sus pens ion <0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011> 196
Air cond itioning menu
Callin gup ........................................ .... 128
Air distribut ion
Se tting ............................................ .....1 27
Se tting (MBU Xmul time diasy stem) ..... 129
Air freshen ersystem
see Perfume atomiz er
Air inle t
see Air-water duct
Air pressu re
see Tire pressur e
Air suspension
see AIRBODY CONTR OL
Air vents ................................................... 132
Ad jus ting (front) ............. .....................132
Ad jus ting (rea r) ............. .......................132 Air
vents
see Airvents
Ai r-condi tioningsystem
see Climat econ trol
Air -recir cula tion mode............................ 130
Air -water duct .......................................... 269
Ke eping free ........................................2 69
Airb ag....... ..................................................41
Ac tivati on ........... ...................................36
Fr ont airbag (driver ,fr ont passeng er)..... 41
Ins tallation locations .............................. 41
Knee airbag............................................ 41
Ov ervie w ................................................ 41
PA SSENGER AIRBAGind icat orlam p.....4 6
Pr otect ion ..............................................4 2
Sid eairba g<0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011001100110011
0011001100110011001100110011001100110011001100110011> 41
Wi ndo wcur tain airbag ...........................4 1
Air flow
Se tting .................................................1 27
Alar m
see Panic alar m
Al ar m system
see ATA(anti-t heftal ar m system) 402
Index