2020 MERCEDES-BENZ C-CLASS SEDAN Owner's Manual

ve
hicle dynamics andsafetysy stems fora shor t
per iod oftime, typica lly30 seconds orless.
The EDR inthis vehicle isdesigned torecor d
su ch dat aas:
R Howvarious systems inyour vehicle were
oper ating
R Whe ther or notth edr iver and front
passeng erseat belts werebuc kled/f astened
R Howfar(if at all)th edr iver wa sdepr essing
th eaccelera torand/or brak epeda land
R Howfast theve hicle wastrave ling
This datacan help prov ide abe tter under stand‐
ing ofthecir cums tances inwh ich acci dents and
inju ries occur .NO TE: EDRdat ais recor ded by
yo ur vehicle onlyif anon- trivial crash situation
occur s;no dat ais recor ded bytheED Runder
nor mal driving conditions andnoper sonal data
(e.g. name, gende r,ag eand acciden tloc atio n)is
re cor ded .Ho wever,ot her parties, suchas law
enf orcement ,could combine EDRdatawit hth e
typ eof personally identifying dataro utin ely
acq uired dur ing acr ash inve stigation . Ac
cess totheve hicle and/or theED Ris needed
to read dat ath at isrecor ded bytheED R,and
special equipment isrequ ired. Inaddition tothe
ve hicle manuf acturer,ot her parties that have the
special equipment, suchas law enf orcement,
can read theinf ormation byacc essi ngtheve hi‐
cle ortheED R.
ED Rdat ama ybe used incivil andcriminal mat‐
te rs as ato ol inaccident recons tructi on,acci ‐
dent claims and vehicle safety. Since theCr ash
Dat aRe trie va l(CDR) tool that isused toextract
da ta from theED Ris comm erciall yav ailable,
Mer cedes-Ben zUS A,LLC("MBUS A")expressl y
disclaims anyand allliability arising from the
ex tracti onofthis inf ormatio nby unaut horized
Mer cedes-Ben zper son nel.
MB USAwill notshar eED Rdat awit hot her swit h‐
out thecon sent oftheve hicle owner or,if th e
ve hicle isleased, without thecon sent oftheles‐
see. Excep tion sto this repr esent ation include
re sponses tosubpoenas bylaw enf orcem ent;by
fe der al,stat eor loc algo vernment ;in connection
wit hor arising outoflitig ation invo lvin g MBUS A
or its subsidia ries and affiliat es; or,as requ ired
by law. Wa
rning: theED Ris acom ponen tof the
Re stra int System Module. Tamp ering with,alt er‐
ing, modifying orremo ving theED Rcom ponen t
ma yre sult inamalfunction oftheRe stra int Sys‐
te m Modu leand other systems.
St atelaws orregulations rega rding EDRs that
con flict withfe der alregulation arepr e-em pted.
This means that intheeve ntofsuch conf lict, the
fe der alregulation governs. As ofDecember
20 16 ,17 stat es have enact edlaws relatin gto
EDRs . Co
pyright Fr
ee and open- sourcesof tware In
fo rm atio non lice nsefo rfr ee and open-sou rce
sof twareused inyour vehicle canbefound on
th edat acar rier inyour vehicle document wallet
and withupdat eson thefo llo wing websit e:
htt p:// www .mercedes- benz.com/open source Gener
alno tes 31

Re
gis tere dtrademar ks R
Bluetoo th®
is are gis tere dtra demar kof Blue‐
to othSIG Inc.
R DTS™ isare gis tere dtrademar kof DT S,Inc.
R Dolb y®
and MLP ™arere gis tere dtra demar ks
of DOLB YLabor ator ies.
R Bab ySmar t™,ESP®
and PRE-S AFE®
arere g‐
is te re dtra demar ksofDaimler AG.
R HomeL ink®
is are gis tere dtra demar kof
Johnson Controls.
R iPod ®
and iTune s®
arere gis tere dtra demar ks
of Apple Inc.
R Burmes ter®
is are gis tere dtra demar kof
Bur mes terAu diosy steme GmbH.
R Micr osoft®
and Windo wsMedia ®
arere gis‐
te re dtra demar ksofMicr osoftCor poration.
R SIRIUS ®
is are gis tere dtra demar kof Sir ius
XM Radio Inc.
R HD Radio™ isare gis tere dtrademar kof iBiq‐
uity Digit alCor poration. R
Graceno te®
is are gis tere dtra demar kof
Gr aceno te,Inc .
R ZAGA TSurve y®
and relat ed brands arere gis‐
te re dtra demar ksofZag atSur vey, LL C. 32
Gener alno tes

Re
stra int system Pr
otection bythere stra int system The
restra int system includes thefo llo wing com‐
pone nts:
R Seat beltsystem
R Airbags
R Child restra int system
R Child seatsecur ingsystems
The restra int system can help preve nttheve hi‐
cle occupants from coming intocont actwith
par tsof theve hicle interior intheev ent ofan
acciden t.In theev ent ofan acciden t,th e
re stra int system can also reduce thefo rc es to
whic hth eve hicle occupants aresubject ed.
A seat beltcanonlypr ov ide thebes tle ve lof pro‐
te ction ifit is wo rncor rectl y.Dep endingonthe
de tected acci dent situation, Emerg encyTensi on‐
ing Device sand /or airba gssupp lement thepr o‐
te ction offere dby acor rectl ywo rnseat belt.
Emer gency Tensi oni ng Device sand /or airba gs
ar eno tde ploy ed ineve ryacc iden t. In
order forth ere stra int system toprov ide the
int ended leve lof protect ion, eachve hicle occu‐
pant mustobser vethefo llo wing informatio n:
R Fasten seat belts correctl y.
R Sitinan almos tup right seat position with
th eir bac kag ains tth eseat backres t.
R Sitwithth eir feet resting onthefloor ,if pos‐
sible.
R Alw ayssecur eper sons under 5ft (1.50 m)
ta llin an addition alrestra int system suitable
fo rMer cedes-Benz vehicles.
Ho wever,no system available toda ycan com‐
ple tely elim inat einj uries and fata lities ineve ry
acc iden tsit uatio n.Inpar ticular ,th eseat belt
and airbag gener ally do notpr otect agains t
objec tspene trating theve hicle from theoutside.
It is also notpossible tocom plet elyru le out the
ri sk ofinjur ycaused bytheairbag deploying. Re
duce dre stra int system protection &
WARNIN GRisk ofinju ryor deat hfrom
modif ications tothere stra int system
The restra int system can nolong erfunc tion
cor rectly afte ralt erations have been made.
The restra int system mayth en notpr otect
th eve hicle occupants asintended byfailing
in an acc ident ortrigg ering une xpec tedly ,fo r
ex am ple #
Neveralt er thepar tsof there stra int
sy stem. #
Neverta mp erwit hth ewir ing orany
electr oniccomponen tpar tsor their
sof tware. If
it is neces saryto modify theve hicle toacc om‐
modat eaper son withdisabil ities, con tact an
au thor ized Mercedes-B enzCent erforde tails.
US Aonl y:forde tails, con tact ourCu stomer
Assis tance Center on 1-800-F OR-MER Cedes
(1‑80 0‑367‑63 72). Occ
upant safety 33

Re
stra int system functiona lity When
theignition isswitc hedon,aself-t estis
per form ed, during whic hth e0075 restra int sys‐
te m wa rning lam plight sup. Itgoes outnolater
th an afe w sec ond saf te rth eve hicle isstar ted.
The com ponen tsof there stra int system areth en
func tional. Malfu
nctioning restra int system A
malfun ction has occurredin there stra int sys‐
te m if:
R The 0075 restra int system warning lam p
does notlight upwhen theignition is
switc hedon
R The 0075 restra int system warning lam p
light sup con tinuousl yor repeat edly during a
jour ney &
WARNIN GRisk ofinju rydue tomalfu nc‐
tions inthere stra int system
If th ere stra int system ismalfunct ioning,
re stra int system com ponen tsma ybe trig‐ ge
redunint entionall yor ma yno tdeplo yas
int ended during anacciden t.This mayaf fect
th eEmer gency Tensi oni ng Device sor air‐
ba gs, forex am ple. #
Have there stra int system checkedand
re pair edimmediat elyat aqu alif ied spe‐
cialis two rkshop. Fu
nction ofthere stra int system inan acci‐
dent Ho
wthere stra int system worksis de term ined by
th ese verity of theim pact detected and thetype
of acciden tantic ipated:
R Front alim pact
R Rear impact
R Sideim pact
R Rollover
The activ ation thre sholds forth ecom ponen tsof
th ere stra int system arede term ined based on
th eev aluatio nof thesensor values measur edat
va rious points intheve hicle. Thisprocess ispre-
em ptive in nat ure. The trigg ering/ deplo yment ofth
ecom ponen tsof there stra int system mus t
ta ke place ingood timeatthest ar tof thecolli‐
sion.
Fa ctor swhi chcan only besee nand measured
af te ra colli sion hasoccur reddo notpla ya deci‐
siv ero le in thedeplo yment ofan airbag. Nordo
th ey prov ide anindic ation ofairbag deployment .
The vehicle maybe def ormed signif icantl ywit h‐
out anairbag beingdeployed. This isthecase if
onl ypar tswhic har ere lativ elyeasil ydef ormed
ar eaf fect ed and thera te ofvehicle deceler ation
is no thigh. Conversely ,an airbag maybe
deplo yedev en though theve hicle suffers onl y
minor deformation. Ifve ry rigid vehicle parts
suc has longitudinal membersar ehit, forex am‐
ple, this ma yre sult insuf ficie ntly highleve ls of
ve hicle deceler ation. 34
Occupant safety

The
comp onent sof there stra int system can
be act ivat ed ordep loye dinde pendently of
eac hot her : Com
pone nt Detected dep loy‐
men tsit uation
Fr ont Emer gency Ten‐
si oni ng Device s Fr
ont alim pact, rear
im pact ,side impact ,
ro llo ver Re
ar Em erge ncy Ten‐
si oni ng Device s Fr
ont alim pact, rear
im pact ,ro llo ver Dr
iver' sai rba g,front
pa sse nger airba g Fr
ont alim pact Knee
airbag Front alim pact Side
airbag Sideimpact
Wi ndo wcur tain air‐
bag Side
impact ,ro llo ver,
fr ont alim pact The
front passeng erairb agcan onlybe depl oyed
in an acciden tif th ePA SSENGER AIRBAGOF F
ind icat orlam pis off.Ifth efront passeng erseat
is occupied, makesur e,bo th bef oreand during th
ejour ney,that thest atus ofthefront
passeng erairbag iscor rect (/ page 45). &
WARNIN GRisk ofburnsfrom hotair bag
com ponents
The airbag partsareho taf te ran air bag has
been deployed. #
Donotto uc hth eair bag parts. #
Have adeplo yedair bag replaced ata
qu alif ied spec ialistwo rkshop assoon
as possible . Mer
cedes-Benz recomme ndsthat youha ve the
ve hicle towe dto aqu alif ied spec ialistwo rkshop
af te ran accide nt.Take this int oacc ount ,par tic‐
ular lyifan Em erge ncy Tensi oni ng Device istrig ‐
ge redor an airbag deployed.
If th eEmer gency Tensi oni ng Device sar etrig ‐
ge redor an airbag isdeplo yed, youwill hear a
ban g,and asmal lamoun tof powder mayalso be
re leased:
R The bang willnotge ner ally affect your hear ‐
ing . R
Ingener al,th epo wder released isno thaz‐
ar dous tohealt hbut maycause short-term
br eat hing difficul ties toper sons suffering
fr om asthma orother pulmonar yconditions .
Pr ov ided itis saf eto do so, leavetheve hicle
immediat elyoropen thewindo win order to
pr eve ntbrea thing difficul ties .
Airb agsand pyrotech nic Emerg encyTensi oni ng
De vice scont ain pe rchlor atemat erial, whic hma y
re qu ire spec ialhandlin gor environm entalpro‐
te ction measures. Na tional guideline sre ga rding
wa ste disposal mustbe obser ved. InCalif ornia,
see http:// www .dtsc. ca.go v/Hazar dousW aste/
Pe rchlor ate/inde x.cfm. Seat
belts Pr
otection prov ided bytheseat belt Alw
aysfa sten your seat beltcorrect lybef ore
st ar tin gajo ur ne y.Asea tbe ltcan only prov ide
th ebes tle ve lof protect ion ifit is wo rncor rectl y. Occupant
safety 35

&
WARNIN GRisk ofinju ryor deat hdue to
inc orrectl yfa stened seatbelt
If th eseat beltisno two rncor rectly ,it can‐
no tper form itsintended protect ive func tion.
In addition, anincor rectly fastened seatbelt
can also cause injuries,forex am ple, inthe
ev ent ofan acciden tor when braking or
ch ang ingdirect ion sudden ly. #
Alw aysensur eth at all vehicle occu‐
pants have their seat belts fastened
cor rectl yand aresitti ngprope rly. Alw
aysobser vetheins truction sabout thecor‐
re ct driver's seatpos ition and adjus ting the
seats (/page93).
In order forth ecor rectly wornseat belttopro‐
vide theint ended leve lof protect ion, eachve hi‐
cle occupant mustobser vethefo llo wing infor‐
matio n:
R The seat beltmustno tbe twis tedand must
fi t tig htly and snuglyacr oss thebody . R
The seat beltmustbe routed acr oss thecen‐
te rof theshoulder andaslow do wn across
th ehips aspossible.
R The shoulder sectionoftheseat beltshould
no tto uc hyo ur neck nor berouted und er
yo ur arm or behin dyo ur bac k.
R Avoid wearing bulk yclo thing, e.g. awint er
coat .
R Push thelap belt down asfaras possi ble
acr oss your hips andpulltight wit hth eshoul‐
der sect ionofthebelt. Neverro uteth elap
belt across your abdom en.
Pr egn ant women mustals ota ke par ticular
car ewit hth is.
R Neverro uteth eseat beltacross shar p,poin‐
te d, abr asiv eor fragile objec ts.
R Onlyone person mayuse eachseat beltat
an yone time. Infants andchildr enmus t
ne vertr ave lsitt ing onthelap ofave hicle
occupant.
R Neversecur eobjects withaseat beltifth e
seat beltisbeing usedbyone oftheve hi‐
cle's occupants. Alwaysobser vetheins truc‐ tion
sfo rloa ding theve hicle when securing
object s,lugg ageor loads (/page10 5).
Als oensu rethat no obj ect s,e.g .a cus hion ,
ar eeve rpla ced between aper son and the
seat.
The seat belts onthefo llo wing seats areeq uip‐
ped withaspec ialseatb eltretract or:
R Co-dr iver seat
R Rear seat s
Ac tivateor deacti vate thespecial seatbelt
re tract oroftheseat belt(/page55).
If ch ildr enaretrav eling intheve hicle, besur eto
obser vetheins truction sand safetyno teson
"Chi ldren intheve hicle" (/page50). Re
duce dse at beltpr otection &
WARNIN GRisk ofinju ryor deat hdue to
inc orrect sea tpos ition
The seatbel tdoe sno tof ferth eint ended
le ve lof protect ion ifyo uha ve notmo vedth e
seat backres tto an almos tve rtical posit ion. 36
Occupant safety

When
braking orintheeve ntofan acci dent,
yo uco uld slide underne athth eseat beltand
sus tain abdomin alor nec kinj uries, forex am‐
ple. #
Adjus tth eseat proper lybef orebegin‐
ning your jour ne y. #
Alw aysensur eth at theseat backres tis
in an almos tve rtical posit ionand that
th eshoulder sectionofyour seat beltis
ro uted acr oss thecent erofyour sho ul‐
der . &
WARNIN GRisk ofinju ryor deat hwhen
additional restra int systems areno tused
fo rper sons withasmal lerbuild
Pe rsons under 5ft (1.50 m)tallcan notwe ar
th eseat beltcorrectly without asuit able
additional restra int system.
If th eseat beltisno two rncor rectly ,it can‐
no tper form itsintended protect ive func tion.
In addition, anincor rectly fastened seatbelt
can also cause injuries,forex am ple, inthe ev
ent ofan acciden tor when braking or
ch ang ingdirect ion sudden ly. #
Alw ayssecur eper sons under 5ft
(1 .50 m)tallin asuit able restra int sys‐
te m. &
WARNIN GRisk ofinju ryor deat hdue to
damag edormodif iedseat belts
Seat belts cannotprov ide protect ion inthe
fo llo wing situat ions:
R The seat beltisdamag ed,has been modi‐
fi ed, isex treme lydirty, bleac hedordyed
R The seat beltbuckleisdamag edor
ex treme lydir ty
R Modif ication sha ve been made tothe
Emerg encyTensi oni ng Device ,sea tbe lt
anc horageor sea tbe ltre tract or
Sea tbe lts ma ysu stain non-visi ble damag ein
an acc iden t,e.g .due toglass splin ters.
Modif iedordamag edseat belts could tear or
fa ilin theev ent ofan acciden t,forex am ple. Modif
iedEmerge ncy Tensi oni ng Device sma y
be deploy ed unint entionally ornotfunc tion
as intended. #
Nevermodify theseat belts, Emergency
Te nsi oni ng Device s,sea tbe ltanc ho‐
ra ge sor seat beltretract ors. #
Makesur eth at theseat belts areno t
damag ed,areno two rnand arecle an. #
Alw aysha ve theseat belts checked
immed iatelyaf te ran accide ntata
qu alif ied spec ialistwo rkshop. Onl
yuse seat belts whichha ve been approved
fo ryo ur vehicle byMer cedes-Ben z. &
WARNIN GRisk ofinju ryor deat hfrom
deplo yedpy rotech nic Emerg encyTen‐
si oni ng Device s
Py rotech nic Emerg encyTensi oni ng Device s
th at have been deployedar eno long eroper a‐
tion aland areunable toper form their inten‐
ded protect ive func tion. #
Ther efor e, have deplo yedpy rotech nic
Emerg encyTensi oni ng Device simm edi‐ Occu
pant safety 37

at
elyre placed ataqu alif ied spec ialist
wo rkshop. Mer
cedes-Benz recomme ndsthat youha ve the
ve hicle towe dto aqu alif ied spec ialistwo rkshop
af te ran accide nt.
* NO
TEDama gecau sed bytrap ping the
seat belt If
an unused seatbeltisno tfully retract ed,it
ma ybe come trap pe din thedoor orinthe
seat mechanism. #
Alw aysensur eth at an unus edseat belt
is full yre tract ed. Re
leasing there ar passe nger comp artment
ce nter seat belt If
th elef t-hand rear seat backres tis folded down
and backup again, itma yno tbe possible topull
out there ar passe nger com partment centerseat
belt. Theseat beltmustbe released. #
Pull theseat beltoutappr oximat ely1 in
(25 mm) attheseat beltoutle ton theseat
bac kres tand then release itag ain.
The seat beltisretract edand released. Fa
stening andadjust ing theseat belts If
th eseat beltispulled quickl yor shar ply, the
seat beltretract orlock s. The seat beltstra pcan‐
no tbe pulled outanyfur ther. #
Alw ayseng ageseat belttongu e2 ofthe
seat beltintoseat beltbuckle1 ofthecor‐
re sponding seat. #
Press and hold theseat beltoutle tre lease
and slide seatbeltoutle t3 intoth edesir ed
position . #
Letgo oftheseat beltoutle tre lease and
ens ureth at seat beltoutlet3 locksinto
posit ion. 38
Occupant safety