2022 MERCEDES-BENZ S CLASS battery

se
vere internal burnstooccur within two
hour s.
Ther eis arisk offata linj ury. #
Keep batt eries out ofthere ac hof chil‐
dr en. #
Ifth eco verand/or capofthebatt ery
com partmen tdoes notclose securely,
do notuse theSmar tKey anylon gerand
ke ep out ofthere ac hof childr en. #
Ifbatt eries aresw allo wed,seek medical
att ent ion immediat ely. +
ENVIR
ONMEN TALNO TEEnvironme ntal
da ma gedue toimproper disposal ofbat‐
te ries Batt
eries con tain polluta nts. Itis
illeg alto dispose ofthem withth ehousehold
ru bbish. #
Dispose
ofbatt eries inan
en vironmen tally re sponsible manner.
Ta ke disc hargedbatt eries toaqu alif ied
spec ialistwo rkshop ortoacol lection
poin tfo rused batteries. Re
quirement s:
R Youre qu ire aCR 203 23V cell battery.
Mer cedes-Ben zre comme ndsthat youha ve the
batt eryre placed ataqu alif ied spec ialistwo rk‐
shop. #
Remo vetheemer gency key(/ pag e75 ). #
Press emer gency key2 into theopening in
th eSmar tKey inthedir ect ion ofthear ro w
unt ilco ver1 opens. Whendoingso,donot
hold cover1 closed . 76
Opening andclosing

Switc
hingsepar atetrunk locking onand off Multimedia
system:
4 © 5
Set ting s5
Vehicle
5 Openin g/closing
Switc hingsepar atetrunk locking on #
Select BlockTrunk Access. #
Creat eaPIN. #
Press OKtoconf irm thePIN. #
Enterth ePIN again and confirm it.
The trunk willremain lockedifyo uunlo ckthe
ve hicle centrally .
% Ifan acc ident hasbeen detected, thetrunk
will unloc keve nif sep aratelock ing is
switc hedon.
% Youcan open thetrunk withth eemer gency
ke yev en while trunk lockis activ e.Separ ate
tr unk locking willremain active.
Swi tching separ atetrunk locking off #
Select BlockTrunk Access . #
EnterthePIN.
If th ePIN iscor rect, sep aratetrunk locking
wi llbe swi tched offand thePIN dele ted.
Re setting thePIN
If yo uha ve forg ottenth ePIN ,yo ucan switchoff
separ atetrunk locking withth eemer gency key. #
Select BlockTru nkAccess . #
Confirm Forg etPIN? . #
Unloc kth etrunk within thre eminut eswit h
th eemer gency key.
Sepa rate trunk lock ing will beswitc hedoff
and thePIN dele ted. Un
loc king andopening thetrunk from insid e
wit hth eemer gency release Re
quirement s:
R The 12Vve hicle batteryis conn ectedand
ch arge d. #
Press emer gency release button1 brief ly. Un
loc king thetrunk lidusing theemer gency
ke y #
Take theemer gency keyout oftheSmar tKey
( / pag e75 ). #
Insertth eemer gency keyin to thetrunk lock
as faras itwil lgo. 88
Opening andclosing

#
Mak esur eth at cup holde r2 isem pty. #
Remo veSmar tKey 1 from theke yring. #
Place Sma rtKe y1 incup hold er2.
The vehicle willstar taf te ra shor ttime.
If Smar tKey 1 isremo vedfrom cup holder
2, theengine continues running .Fo rfur ther
engine star ts,ho we ver,Smar tKey 1 mus t
be locat edincup hold er2 during theent ire
jour ney. #
Have Smar tKey 1 checkedat aqu alif ied
spec ialistwo rkshop.
If th eve hicl edoes notst ar t: #
Lea veSmar tKey 1 incup holder 2. #
Depr essthebr ak epedal andstar tth eve hi‐
cle using thest ar t/ stop butt on.
% Youcan also switchon thepo we rsupp lyor
th eignition withth est ar t/ stop butt on.
Obser vetheinf ormation rega rding displa ymes‐
sag esthat can bedispla yedon thedr iver dis‐
pla y. St
arting theve hicl evia Remo teOnline Serv‐
ices Cooling
orheating theve hicl eint erior before
st ar ting thejou rney
Ensu rethefo llo wing beforest ar tin gth eengine:
R theleg alstipulation sin thear ea wher eyo ur
ve hicle ispar kedallo wengin est ar tin gvia
smar tphon e.
R itis saf eto star tand runth eengine where
yo ur vehicle ispar ked.
R thefuel tank issu fficien tly full.
R thest ar terbatt eryis suf ficie ntly charge d. Char
ging thest ar terbatt erybe fore star ting
th ejou rney
If th eve hicle batteryis disc harged, youcan
re cei veames sageon your smar tphon e.Youcan
th en star tth eve hicle withth esmar tphon eto
ch arge thebatt ery. The vehicle isaut omatically
switc hedoffaf te rte nminu tes.
Ensur eth efo llo wing beforest ar tin gth eengine:
R The legalstipulation sin thear ea wher eyo ur
ve hicle ispar kedallo wengin est ar tin gvia
smar tphon e.
R Itis saf eto star tand runth eengine where
yo ur vehicle ispar ked.
R The fuel tank issu fficien tly full.
St arting theve hicl e(R emo teOnline) &
WARNIN GRisk ofcrus hing orentr ap‐
ment dueto unin tentio nalstar tin gof the
engine
Limbs couldbecrushed ortrapped ifth e
engine isstar tedunint entionall ydur ing
ser vice ormaint enanc ewo rk. Dr
iving and parking 18
3

*
NO
TEWearing out thebr ak elinings by
continu ously dep ressing thebr ak epedal #
Donotdepr essthebr ak epedal contin‐
uousl ywhils tdr iving. #
Touse thebr aking effect of theengine,
shif tto alowe rge ar ingood time. *
NO
TEDama getothedr ivet ra in and
engin ewhen pulling away #
Donotwa rm uptheengine whilethe
ve hicle isstatio nary.Pull away immed i‐
at ely. #
Avoid high engine speeds anddriving at
full thro ttle untilth eengine hasreac hed
its operatin gte mp eratur e. *
NO
TEDama getothecat alytic converter
due tonon-co mbusted fuel The
engine isno tru nning smoothly and is
misf iring.
Non-c ombus tedfuel mayge tint oth ecat a‐
lyt iccon verter . #
Onlydepr esstheaccelera torpeda l
slig htly. #
Have thecause rectif ied imme diat ely at
a qu alif ied spec ialistwo rkshop. *
NO
TEReduced batterylif e due tofre‐
qu ent shor t-dis tance trip s The
12Vbatt eryma yno tbe suf ficie ntly
ch arge dwhen theve hicle isused onlyfo r
shor t-distance trip s. Thi sre duces thelife of
th ebatt ery. #
Drive long er dist anc esregular lyto
ch arge thebatt ery. No
teson driving witharo of load ,tr ailer or
full ylad envehicl e
When driving withaloa ded roof lugg agera ck or
tr ailer aswellas wit hafull yladen orfull yocc u‐
pied vehicle, theve hicle's driving andsteer ing
ch aract eristic sch ang e. Yo
usho uld bear thefo llo wing inmin d:
R Donotexc eed theper missible roof load and
to wing capac ity.Als oobser vethete ch nica l
da ta inthepr int ed Oper ator's Manual.
R Evenl ydis tribut eth ero of load, andplace
hea vyobject sat thebo ttom. Also comply
wit hth eno teson loadi ngtheve hicle
(/ page12 8).
R Drive att enti vely,and avoidsudden lypulling
aw ay,br aking andsteer ing aswellas rapid
cor ner ing.
No teson driving onsalt- treat edroads
The braking effect islimit edon salt-tr eated
ro ads.
Ther efor e, obse rveth efo llo wing notes:
R due tosalt build-up onthebr ak ediscs and
br ak epads, thebr aking distance canincrease
consi derably orresult inbraking onlyonone
side
R maint ainamuc hgr eat ersaf edis tance tothe
ve hicle infront 18
8
Driving and parking

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 e35
1

&
WARNIN GRisk ofexplosion during
ch argin gpr oce ssand star tin gassis tance
Dur ing thech argin gpr oce ssand star tin g
assis tance, thebatt eryma yre lease anexplo‐
siv ega smixtur e. #
Avoid fire ,open flames ,cr eat ing spar ks
and smoking. #
Mak esur eth er eis suf ficie ntventil a‐
tio n. #
Donotle an ove ra batt ery. &
WARNIN GRisk ofexplosion from afro‐
zen battery
A disc hargedbatt eryma yfreeze attemp era‐
tur es slightl yabo veorbelo wfreezing point.
Dur ing star tin gassis tance orbatter ych arg‐
ing ,bat tery gascan bereleased. #
Alw aysallo wabatt eryto thaw before
ch argin git or per form ing star tin gassis ‐
ta nce. If
th eindicat or/warning lampsintheins trument
clus terdo notlig ht up atlow temp eratur es,itis
ve ry likelyth at thedisc hargedbatt eryhas fro‐
zen .In this case youma yne ither jump-start the
ve hicle norcharge thebatt ery.
The service life of abatt eryth at has been
th awe dma ybe dramaticall yshor tened .The
st ar tin gch aract eristic sma ybe impair ed,espe ‐
ciall yat low temp eratur es.
It is recomme ndedthat youha ve ath aw ed bat‐
te ry checkedat aqu alif ied spec ialistwo rkshop.
All vehicl es
* NO
TEDama gecau sed bynum erou sor
ex tende datt em ptsto star tth eengine Nu
me rous orextende datt em ptsto star tth e
engine maydamag eth ecat alytic converter
due tonon-co mbusted fuel. #
Avoid numer ousand extende datt em pts
to star tth eengine. Obser
vethefo llo wing pointsdur ing star tin g
assis tance and when chargin gth ebatt ery:
R Onlyuse undamag edjum per cables/c harg‐
ing cables withasuf ficie ntcross -secti onand
insu late dte rm inal clam ps.
R Non-insulat edpar tsof thete rm inal clam ps
mus tno tcom eint ocon tact with other metal
par tswhile thejum per cable/c harging cable
is con nect edtothebatt ery/jum p-start con‐
nectio npoi nt.
R The jumper cable/c harging cable mustno t
com eint ocon tactwi th anypar tswhic hma y
mo vewhen theengine isrunning .
R Alw aysmak esur eth at nei ther youno rth e
batt eryis elect rostatic allych arge d.
R Keep away from fire and open flames .
R Donotlean overth ebatt ery.
Obser vetheadditional follo wing pointswhen
ch argin gth ebatt ery:
R Onlyuse batterych arge rs tested and
appr oved forMer cedes-Benz.
R Read thebatt erych arge r's oper ating instruc‐
tions beforech argin gth ebatt ery. 352
Breakdo wnassis tance

usin
gth ejum per cable. Startwit hth edonor
ve hicle firs t. #
Startth eengine ofyour ow nve hicle. #
Letth eengines runfo rse veralmin utes. #
Beforedisco nnect ing thejum per cables,
switc hon anelectr icalconsumer inyour ow n
ve hicle, e.g.there ar wind owheat eror the
light ing.
When star tin gassis tance hasfinis hed : #
First,re mo vethejum per cable from the
gr ou nd point ofyour ow nve hicle andthe
neg ative term inal ofthedonor battery, then
re mo vethejum per cable from thepositiv e
con tacts ofboth vehicles. Alwaysst ar twit h
yo ur ow nve hicle firs t. #
Close protect ive co ver2 ofposi tivecont act
3 and close cover1.
Fu rther information canbeobt ained ataqu ali‐
fi ed specialis two rkshop. Char
ging the12 Vbatt ery #
Connect thepositiv econ tacts oftheve hicle
and thech arge rwit hth ech argin gcable .
St artwit hth eve hicle firs t. #
Connect theneg ativecon tact of thech arge r
and grou nd point 4 ontheve hicle withth e
ch argin gcable .St artwit hth ech arge rfirs t. #
Startth ech argin gpr oce ss.
When thech argin gpr oce ssiscom plete: #
Remo vethech argin gcable from groun d
poin t4 ontheve hicle andtheneg ativecon ‐
ta ct of thech arge rfirs tand then from the
positiv econ tacts ontheve hicle andcharge r.
Alw aysst ar twit hth eve hicle firs t. #
Close protect ive co ver2 ofposi tivecont act
3 and close cover1. Re
plac ingthe 12Vbatt ery #
Obs erve theno teson the12 Vbatt ery
(/ page349).
Mer cedes-Benz recomme ndsthat youha ve the
12 Vbatt eryre placed ataqu alif ied spec ialist wo
rkshop, e.g.atan aut hor ized Mercedes-Benz
Cent er.
Obser vethefo llo wing notesif yo uwa ntto
re place thebatt eryyo urself :
R Alw aysre place afa ulty battery wit habatt ery
whic hmee tsthespecif icvehicle requ ire‐
men ts.
The vehicle iseq uipped withan AGMtech nol ‐
ogy batter y(A bso rbentGlas sMa t)or alith ‐
ium-io nbatt ery. Fu llve hicle functionality is
onl yguar anteed withan AGMbatt eryor lith‐
ium-ion battery. Fo rsaf etyre ason s,
Mer cedes-Ben zre comme ndsthat youon ly
use batteries whic hha ve been tested and
appr ovedfo ryo ur vehicle byMer cedes-Ben z.
R Carryove rde tach able parts,suc has vent
hos es,elbo wfitting sor term inal covers from
th ebatt erybeing replaced.
R Mak esur eth at theve nt hos eis alwa ys con‐
nect edtotheor iginal opening ontheside of
th ebatt ery.
Ins tallan yex istin gor supplied cellcaps.
Ot her wise, gases orbatt eryacid could
escape. 35
4
Breakdo wnassis tance

Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
PRE-S AFEInoperat iveSee
Operator' sManual *
The PRE‑S AFE®
funct ionsaremalfunct ioning. #
Consult aqu alif ied spec ialistwo rkshop.
PRE-SA FEImpulse Side
Inoperative SeeOperator's
Manual *
The PRE‑S AFE®
Im pulse Sidesystem ismalfunct ioningorinoper ativeaf te rha ving alread ybeen trigg ered. #
Consu ltaqu alif ied spec ialistwo rkshop. Smar
tKey Disp
laymes sages
Possible causes/conseq uencesand0050 0050
Solutions
Á Obtain aNew Key *H
aveSmar tKey replaced. #
Consult aqu alif ied spec ialistwo rkshop.
Á Repla ceKey Battery *T
heSmar tKey batt eryis disc harged. #
Replace thebatt ery(/ page75 ). Displa
ymessag esand warning/ indic ator lam ps 499