ECU MERCEDES-BENZ E-CLASS CABRIOLET 2021 Service Manual

fuel
filler flap. Other wise, engineoutput can be
re duced andfuel consum ption increased. 1
Fuelfiller flap
2 Brac ketfo rfuel filler cap
3 Tire pressur eta ble
4 QRcode forre scue card
5 Statio naryheat erind icat ion
6 Fueltype #
Press onthebac kar ea offuel filler flap 1. #
Turn thefuel filler cap coun ter-cloc kwiseand
re mo veit. #
Insertth efuel filler cap from aboveinto
br ac ket2. #
Comp lete ly inse rtthepum pnoz zleintoth e
ta nk filler neck,hook inplace andrefuel . #
Onlyfill th efuel tank unti lth epum pnoz zle
switc hesoff. #
Replace thecap onthefiller neckand turn
cloc kwise untilit eng ages audibl y. #
Close fuelfiller flap 1. Pa
rking Pa
rking theve hicl e &
WARNIN GRisk ofacci dent andinjury
cau sed byan insufficie ntlysecu redve hi‐
cle rolling away
If th eve hicle isno tsecur elyparkedsuf fi‐
cie ntly ,it can rollaw ay inan unc ontrolled
wa yev en ataslight downhill gradient. #
Onuphill ordownhill gradients, turnth e
fr ont whee lsso that theve hicle rolls
to wa rdsth ecurb ifit star ts mo ving. #
App lythepar king brak e. #
Switc hth etra nsmiss iontoposition 005D. &
WARNIN GRisk offire cau sed byhot
ex haus tsy stem parts
Flammable materials suchas lea ves, grass or
twigs mayignit e. #
Park theve hicle sothat no flammab le
mat erial can com eint ocon tact with hot
ve hicle component s. #
Inpar ticular ,do notpar kon drygr ass‐
land orhar vested grain fields. Dr
iving andparking 15
7

&
WARNIN GRisk ofacci dent andinjury
due tochildr enleftunat tende din the
ve hicle
If ch ildr enarelef tunsuper visedintheve hi‐
cle, they cou ld,in pa rticular :
R Open doors,ther eb yendang ering other
per sons orroad user s.
R Getout and bestru ck byoncom ingtraf‐
fi c.
R Ope rate vehicle equipment andbecome
tr apped, forex am ple.
In addit ion,th ech ildr encould alsosetth e
ve hicle inmo tion, forex am ple by:
R Releasing thepar king brak e.
R Changing thetra nsmiss ionposition .
R Startin gth eve hicle. #
Neverlea vechildr enunat tende din the
ve hicle. #
When leaving theve hicle, alwaysta ke
th eSmar tKey wit hyo uand lockth e
ve hicle. #
Keep theve hicle SmartKey out ofreac h
of childr en. *
NO
TEDama getotheve hicle duetoit
ro lling away #
Alw ayssecur eth eve hicle agains tro ll‐
ing away. *
NO
TEDama gedue totheve hicle lowe r‐
ing Ve
hicl eswith AIRBO DY CONT ROLor
le ve lcontr ol:The vehicle canlowe rbecau se
of temp eratur edif fere nces orlong er non-
op erati ona ltime s.Thi scan causedama geto
par tsof thebody . #
When stopping theve hicle andwhen
dr iving off,mak esur eth at ther ear eno
obs tacle ssu ch ascur bsunde ror inthe
immed iatevicin ityofthebody . #
Bring theve hicle toast ands tillby pressing
th ebr ak epedal. #
Ongradients, turnth efront wheels sothat
th eve hicle willrollto wa rdsth ecurb ifit
st ar ts mo ving. #
App lytheelectr icpar king brak e. 15
8
Driving and parking

#
Eng agetrans mis sion positio n005D inast atio n‐
ar yve hicle withth ebr ak epedal applied
(/ page15 2). #
Swi tchof fth eengine andtheignition by
pr essing button1. #
Release theser vice brak eslo wly. #
Getout oftheve hicle andlockit.
% When youpar kth eve hicle, youcan still
opera tetheside windo wsand thesof tto p
fo rapp roxima tely four min utes ifth edr iver's
door isclosed. Gar
agedoor opener Pr
og rammin gbutt onsfo rthe garage doo r
ope ner &
DANG ER Risk ofdeat hcause dby
ex haus tga ses
Combus tionengines emitpoisonous exhaus t
ga ses suchas carbon monoxide.Inhaling
th ese exhaus tga ses ishazar dous tohealt h
and leads topoisonin g. #
Neverlea vetheengine or,if pr esent ,
th eauxiliar yheating running inan
encl osedspa cewithout sufficie ntventi‐
la tio n. &
WARNIN GRisk ofinju rywhen opening
or clos ingadoor withth ega rage door
opener
When youoper ateor program thedoor with
th eint egr ated garage door opener ,per sons
in thera ng eof mo vement ofthedoor may
become trapped orbe stru ck bythedoor . #
Alw aysmak esur eth at nobody iswit hin
th era ng eof mo vement ofthedoor . Onl
yoper ateth efo llo wing doorsusing the
ga rage door opener :
R Door swit hasaf etyst op and reve rsing fea‐
tur e
R Doorswhic hcon form tothecur rent U.S.
sa fety standar ds Re
quirement s:
R The vehicle hasbeen parkedoutside the
ga rage oroutside thera ng eof mo vement of
th edoor .
R The engine isswitc hedoff.
R The ignition isswitc hedon.
% The garage door opener function isalw ays
av ailable whentheignition isswitc hedon. Dr
iving andparking 15
9

#
Push handle 1.
The red0049 (USA)or0024 (Canada) indica‐
to rlam plig hts upintheins trument cluster.
% The electr icpar king brak eis onl ysecur ely
applied ifth eindicat orlam pis lit con tinu‐
ously .
Re leasing #
Swit chon theignition . #
Pull handle 1.
The red0049 (USA)or0024 (Canada) indica‐
to rlam pin theins trument clustergoes out.
Emer gency braking #
Press and hold handle 1.
As long astheve hicle isdriving, thePlease
Release ParkingBrak emessag eis displa yed
and there d0024 indicat orlam pflashes .
When theve hicle hasbeen brak ed toa
st ands till,th eelectr icpar king brak eis
applied. Thered0049 (USA)or0024 (Can‐
ada) indicat orlam plights upintheins tru‐
ment cluster. No
teson par king theve hicl efo ran extended
per iod If
yo ulea vetheve hicle parkedfo rlong erthan six
we eks,itma ysuf ferdama gethro ugh disus e.
The 12Vbatt eryma yalso beimpair edordam‐
ag ed byhea vydisc harging.
% Further information canbeobt ained ata
qu alif ied spec ialistwo rkshop. St
andb ymode (ext ens ion ofthe star terbat‐
te ry 's per iod out ofuse) St
andb ymode function
% This function isno tav ailable forall model s.
If standb ymode isact ivat ed, energyloss willbe
min imis eddur ing ex tende dpe riods ofnon- oper‐
ation.
St andb ymode isch aract erised bythefo llo wing:
R The star terbatt eryis preser ved.
R The maximum non-opera tionaltime appear s
in themedia display.
R The conn ection toonline services isint erru p‐
te d. R
The ATA(anti-t heftal ar m system) isno tav ail‐
able.
R The function forde tecting collisions ona
pa rked vehicle isno tav ailable.
If th efo llo wing condition sar efulf illed, standb y
mode canbeact ivat ed ordeac tivated usin gth e
multime diasystem:
R The engine isswitc hedoff.
R The ignition isswitc hedon.
Ex ceeding theve hicle's displayednon -opera ‐
tion altime maycause inconvenience, i.e.it can‐
no tbe guarant eedth at thest ar terbatt erywil l
re liabl yst ar tth eengine.
The star terbatt erymus tbe charge dfirs tin the
fo llo wing situat ions:
R The vehicle's non-oper ational timemustbe
ex tende d.
R The Batte ryCh arg eInsu fficie ntfor Stand by
Mod emes sage appear sin themedia display.
% Standb ymode isaut omat icallydeac tivated
when theignition isswitc hedon. Dr
iving andparking 16
3

If
th eve hicle deviat esfrom thedir ect ion desir ed
by thedr iver ,ES P®
can stabiliz eth eve hicle by
int erve ning inthefo llo wing ways:
R One ormor ewheels arebr ak ed.
R The engine outputisadap tedaccor dingto
th esituation .
When ESP®
is deactiv ated, the00BB warning
lam plight sup con tinuousl y:
R Drivin gst abilit ywill nolongerbe improv ed.
R The drive wheels couldspin.
R ETS/4 ETStraction control isstill act ive.
% When ESP®
is deact ivat ed, youar est ill assis‐
te dby ESP ®
wh en braki ng.
Wh enthe00E5 warning lam pflashes ,on eor
se veralwheels hasreac hed itsgrip limit :
R Adaptyo ur drivin gst yle to suit thecur rent
ro ad and weather condition s.
R Donotdeac tivateES P®
.
R Onlyde pres sth eacceler ator pedal asfaras
is necessar ywhen pulling away. Dea
ctivateESP ®
in thefo llo wing situat ionsto
im prove tracti on:
R Whenusing snowch ains .
R Indeep snow .
R Onsand orgrav el.
% Spinn ingthewheels results inacutting
action, whichenhances traction.
If th e00E5 ESP®
wa rning lam plight sup con tinu‐
ousl y,ESP ®
is no tav ailable duetoamalf unction.
Obse rveth efo llo wing informatio n:
R Warning and indic ator lam ps(/ page392 )
R Disp lay mess ages (/ page343)
ET S/4ET S(Electr onicTractio nSy stem)
ET S/ 4ETS tracti oncontr olispa rtof ESP ®
and
mak esitpossible topull away and accelerat eon
a slippe ryroad.
ET S/ 4ETS can improve theve hicle's traction by
int erve ning inthefo llo wing ways:
R The drive wheels arebr ak ed individually if
th ey spin. R
Mor edr ive to rq ue istrans ferred tothewheel
or wheels withtra ction.
Inf luence ofdrive pr og rams onESP®
The drive pr og rams enabl eESP ®
to adap tto dif‐
fe re nt we ather and road con dition sas wellas
th edr iver's prefer reddr iving style. Depen dingon
th eselect eddrive pr ogr am, theappr opriate
ES P®
mode willbeactiv ated. Youcan selectthe
dr ive pr ogr ams using theDY NA MIC SELE CT
switc h(/ page15 0). Fu
nction ofESP ®
Cr osswind Assist ES
P®
Cr osswind Assistde tects sudde ngu stsof
side wind andhelps thedr iver tokeep theve hi‐
cle inthelane:
R ESP®
Cr osswind Assistis activ eat vehicle
speeds between appr ox.47 mph(7 5 km/h)
and 125mp h(2 00 km/h) whendr iving
st ra ight ahead orcor ner ing slight ly.
R The vehicle isstabiliz edbymeans ofindivi d‐
ua lbr ak eapp lication onone side. Dr
iving andparking 16
7

R
The incline mustno tbe great erthan 30%.
Ac tiv atin g/deac tivatin gthe HOL Dfun ction &
WARNIN GRisk ofan acci dent dueto the
HOLD functio nbei ng activ ewhe nyo u
lea vetheve hicle
If th eve hicle isonl ybr ak ed withth eHOLD
func tion itcould, inthefo llo wing situat ions,
ro llaw ay:
R Ifth er eis amalfunct ioninthesy stem or
in thepo we rsupp ly.
R Ifth eHOLD function isdeactiv ated by
depr essing theaccelera torpeda lor brak e
peda l,e.g. byave hicle occupant. #
Alw ayssecur eth eve hicle agains tro ll‐
ing away bef oreyo ulea veit. Re
quirement s:
R The vehicle isstatio nary.
R The driver's door isclosed ortheseat belton
th edr iver's side isfastened. R
The engine isrunning orhasbe en automati‐
cally switc hedoffby theEC Ostar t/ stop
funct ion.
R The electr icpar king brak eis released.
R ActiveDis tance AssistDIS TRONI Cis de acti ‐
va ted.
R The transmis sionisin position 005B,005Eor005C.
Ac tiv atin gthe HOL Dfunc tion #
Dep ress thebr ak epedal, andafte ra shor t
time quickl ydepr essfurther until the00D9
displa yappear sin themultifunc tiondispla y. #
Release thebr ak epedal.
Deactiv atingtheHOLD function #
Depr esstheacceler ator pedal topull away.
or #
Depr essthebr ak epedal untilthe00D9 dis‐
pla ydisappear sfrom themultifunc tiondis‐
pla y.
The HOLD functionisdeactiv ated inthefo llo w‐
ing situat ions:
R ActiveDis tance AssistDIS TRONI Cis acti va‐
te d. R
The transmission isshif tedto position 005D.
R The vehicle issecur edwithth eelectr icpar k‐
ing brak e.
In thefo llo wing situat ions,th eve hicle isheld by
tr ans missi on positio n005D and /or bytheelectr ic
par king brak e:
R The seat beltisunf astened andthedr iver's
door isopened.
R The vehicle isswitc hedoff.
R Ther eis amalfunction inthesy stem orthe
po we rsupp lyis insuf ficie nt. Fu
nction ofHill StartAss ist Hill
StartAs sis tholds theve hicle fora shor t
time when pulling away on ahill under thefo l‐
lo wing condition s:
R The transmiss ionisin posit ion005Bor005E.
R The elect ric pa rking brak eis released.
This gives youen ough timeto mo veyour foot
fr om thebr ak epedal totheaccelera torpeda l
and depr essitbef oreth eve hicle begins toroll
aw ay. Dr
iving and parking 16
9

St
eer ing wheel controlpanel forcr uis econtr ol
J Adoptsthestor ed/de tected spe ed
± Deacti vatescr uise control
M Activates cruise contr ol
N Deactivates cruise contr ol
1 Contr olpa nel toinc rease/ decrease spee d #
Toactiv atecr uise contr ol: press M. Ac
tiv atin gcr uis eco ntr ol #
Press M orN oncontr olpa nel 1.
The current spe edisstor ed and maint ained
by theve hicle.
or #
Press J.
The lastst or ed speed iscalled upand main‐
ta ined bytheve hicle.
If th elas tst or ed speed hasprev iousl ybeen
dele ted, thecur rent vehicle speed isstor ed.
% When youswit choffth eve hicle, thelas t
speed stor ed isdele ted.
Incr easing/decr easingthesto redspe ed #
Toinc rease thestor ed speed: swipeupwards
fr om thebo ttom ofcon trol panel 1.
R The stor ed speed isincr eased by1mp h
(1 km/ h). #
Todecr ease thestor ed speed: swipedown‐
wa rdsfrom theto pof con trol panel 1.
R The stor ed speed isdecr eased by1mp h
(1 km/ h).
or #
Brief lypress M orN oncon trol panel
1.
The stor ed speed isincr eased ordecr eased
to thefo llo wing values depen dingonthe
unit :
R mph:thene xt value endin gin 5
R km/h: thene xt value endin gin 0
or #
Accel erateth eve hicle tothedesir edspeed. #
Press M oncon trol panel 1.
Ad opting ade tected spe ed
If cr uise control isact ivat ed and Traf fic Sign
Assi sthas detected aspe edrestriction signwi th
a max imum permiss iblespee dand this isdis‐
pla yedin theins trument cluster: #
Press J.
The maximum permissible speedshownby
th etraf fic sig nis stor ed and theve hicle
maint ainsthis speed.
Deactiv ating cruise contr ol #
Press ±. Dr
ivin gand parking 17
3

#
Press M ontheupper sectionofcon trol
panel 1.
Ad opting thelimit speed shownintheins tru‐
ment cluster #
ActivateAc tiveDis tance AssistDIS TRONI C. #
Press J.
The limit spee ddisp laye din theins trument
clus teris ado ptedas thestor ed speed. The
ve hicle adaptsits speed tothat oftheve hicle
in front, butonlyup tothestor ed speed.
Pulling away wit hAc tiv eDi stance Assist
DI ST RO NIC #
ActivateAc tiveDis tance AssistDIS TRONI C
and remo veyour foot from thebr ak epedal. #
Press J.
or #
Depr esstheacceler ator pedal brief lyand
fi rm ly.
The funct ionsofActiveDis tan ceAssi st
DIS TRONI Cconti nuetobe car ried out. Re
duci ngorinc reasin gth especif ieddis‐
tance from theve hicl ein front #
Press K.
The Ò display app earsunder theç
st atus displa y.
The specif ieddistance isreduced byone
le ve l.
If th elowe stleve lis alr eady selected, the
selection jumpstothehighes tle ve l.
Deactiv ating Activ eDi stance Assist
DI ST RO NIC &
WARNIN GRisk ofan acci dent dueto
Ac tiveDis tan ceAssi stDIS TRONI Cbe ing
acti vewhen youlea vethedr iver's seat
If yo ulea vethedr iver's seat while theve hicle
is being brak ed byActiveDis tance Assist
DIS TRONI Conly ,th eve hicle canrollaw ay. #
Alw aysdeactiv ateAc tiveDis tance
Assi stDIS TRONI Cand secureth eve hi‐
cle topreve ntitfrom rolling away
bef oreyo ulea vethedr iver's seat. #
Press ±.
% Ifyo ubr ak e, deac tivateES P®
or ifES P®
int erve nes, ActiveDis tance Assist
DIS TRONI Cis de acti vated.
Fu nction ofActiv eSpe edLimit Assist
If speed limitch ang ebe tween 12mp h
(20 km/ h)and 80mph(1 30 km/h) isde tected
and theaut omatic adoptionofspeed limitsis
activ e,itwill beaut omaticall yadop tedas the
st or ed speed (/page19 1).
Th edr iven spee dis adj ustedwhen theve hicle is
le ve lwit hth etraf fic sig nat thelat est.In the
case ofsig ns indi cati ngentr yint oan urb anarea ,
th espeed isadap tedaccor dingtothespeed
per mitt edwithin theurban area. The speed limit
displa yin theIns trument Displayis alw aysupda ‐
te dwhen theve hicle isleve lwit hth etra ffic sign .
If th er eis no speed restriction onanunlimited
st re tchof road (e.g.on afree wa y), there com‐
mend edspe edisau tomatical lyadop tedas the
st or ed speed. Thesystem uses thespeed stor ed
on anunlimit edstre tchof road asthere com‐
mend edspe ed. Ifyo udo notalt er thestor ed 17
8
Driving and parking

If
th esy stem detects that thedr iver has not
st eer edtheve hicle fora consider ableper iod of
time orhas remo vedth eir hands from thesteer‐
ing wheel, display1 appear sin themultifunc ‐
tion displa y.Ifth edr iver still does notst eer the
ve hicle, orgiv es no conf irmation tothesy stem,
a wa rning tone sou nds inad ditio nto thevisual
wa rning mess age.
If th edr iver still does notre spond tothewa rn‐
ing, theBeginn ingEmer gencySt op messag e
appear sin themultifunc tiondispla y.Ifth edr iver
st ill does notre spond, ActiveDis tance Assist
DIS TRONI Creduces thespeed. Thevehicle is
deceler ated instag es toast ands till.
De pen dingon thecount ry,at speeds below
40 mph(60 km/h) thehazar dwa rning light s
switc hon aut omat ically.
When theve hicle isstatio nary,thefo llo wing
act ions arecar ried out :
R The vehicle issecur edwithth eelectr icpar k‐
ing brak e.
R ActiveDis tance AssistDIS TRONI Cis end ed
R The vehicle isunloc ked. R
Ifpossible, anemer gency callis place dto
th eMer cedes- Benzemergency callcent er
The driver can cance lth edeceler ationatany
time byper form ing one ofthefo llo wing actions :
R Steer ing
R Braking oracceler ating
R Deact ivating ActiveDis tance Assist
DIS TRONI C Ac
tiv eLan eCha ngeAs sist Fu
nction ofActiv eLan eCha ngeAs sist
Ac tiveLa ne Chang eAssi stsuppor tsthedr iver
when chang inglane sby appl ying steer ing torq ue
if th edr iver oper ates atur nsignal indicat or.
Obser vetheno teson driving systems andyour
re sponsibili ty;yo uma yot her wise failto recog‐
nize dangers(/ page 164).
Assis tancewhe nch ang inglane sis prov ided ifall
th efo llo wing condition sar eme t:
R Youar edr ivin gon afree wa yor road with
mult iplelanesin thedir ect ion oftra vel. R
The neigh boring lane issepar ated byabr o‐
ke nlane ma rking.
R Novehicle isde tected intheadjacen tlane.
R The vehicle speed isbe tween 50mph
(80 km/ h)and 110mp h(1 80 km/h).
R ActiveLa ne Chang eAssi stisswitc hedonin
th emultimedia system.
R ActiveSt eer ing Assis tis activ ated and activ e.
If no vehicle isde tected intheadjacen tlane and
a lane chang eis per mitted, thelane chang e
begin saf te rth edr iver has activ ated thetur nsig‐
nal indicat or.This issho wntothedr iver wit ha
gr een arro w ne xt to the± steer ing wheel
symbol. TheLane Change tothe Left messag e,
fo rex am ple, also appear s.IfAc tiveLa ne Chang e
Assi sthas been activated withth etur nsignal
indicat orbut alane chang eis no timm ediat ely
poss ible, agr ay arro w appear sne xt to the±
st eer ing wheel symbol, whichre mains green.
When thelane chang eassis tance star ts,th etur n
signal indicat orisaut omaticall yactiv ated along
wit hth edispla yin themultifunc tiondispla y. 18
4
Driving and parking

%
The displa yalso goes outinthefo llo wing
cases :
R When turnin gof fbef oreth eint ersect ion
int oacr oss orside stre et
R When turning beforeth eint ersect ion
% The direct ion arrow sar edispla yeddepend‐
ing onthefo llo wing functions:
R Atur nsign alisset
R Alane isrecomme ndedduring acti ve
ro uteguidan ce
If ne ither function isact ive, there maini ng
time untilthene xt green phase forth elane
st ra ight ahead isdispla yed.
% Use ofthetraf fic light informati onser vice
re qu ires there gular transmission ofvehicle
positions anddriving directions to
Mer cedes-Ben z.The datais immediat ely
anon ymized byMer cedes-Ben zand forw ar‐
ded tothepr ov ider ofthetra ffic light infor‐
matio nser vice .The vehicle positions and
dr iving directions aredele tedaf te ra ve ry
shor ttime (afew sec ond s)and areno tper‐
man entlysave d. If
yo udo notwa nttotrans mitth eve hicle
positions anddriving directions, youha ve
th efo llo wing option s:
R Youdeac tivateth eser vice inthe
Mer cedes mePortal.
R Youha ve theser vice deactiv ated atan
aut hor ized Mercedes- BenzCenter.
R Youdeac tivateth eser vice intheAssis-
tanc emenu inthemultimedia system
(/ page19 4).
% This traf fic light data ser vice isonly available
in cit ies and regions countries.
The func tion issuppor tedunder thefo llo wing
con dition s:
R The vehicle iseq uipped withamultimedia
sy stem featur ingnavig atio nand acom mun i‐
cat ion modul ewit han act ivat ed, integrated
SIM card.
R Youha ve auser accoun tfo rth eMer cedes
me Portal.
R The vehicle hasbeen connectedwithth e
user accoun t. R
The navig atio nser vices optio nis available,
subsc ribed toand activat ed intheMer cedes
me Portal.
R The traffic light data ser vice iswit hin the
scope ofthena vig ation service.
The current vehicle position andthedir ect ion of
tra velar etransmit tedvia thecomm unication
module andaligned withth edat afrom thetraf‐
fi c light data ser vice prov ider .The prov ider gath‐
er sdat afrom traffic light swhic htransm itth eir
ch ang ingphase s.When theve hicle approaches
an intersection withne tworke dtra ffic light s,
dat ais transm itted totheve hicle.
A se ttur nsignal leftor right and lane recom‐
mend ations during acti verouteguidan ceare
tak en intoacc oun tfo rth edispla y.
The service isforinf ormation purposes onlyand
is no tlink edtoanyot her vehicle functions, sys‐
te ms orcom ponents. Pleasenote that thedis‐
pla yeddat ais no tav ailable inall traf fic ar ea s
and maybe incor rect.
Ce rtain light signalsystems automatic allyadap t
th eir switc hingtimes tothecur rent traf fic situ a‐ Dr
iving and parking 19
3