2023 MERCEDES-BENZ GLC COUPE Owners Manual

ASS
YS ASS
YSTPL T
PL US ser US
service int vice
interv er
val dis pla y al
dis pla y FF
uncti onoft uncti
onofthe ASS YS he
ASSYST PL T
PL US ser US
service int vice
interv er
val dis - al
dis -
pla y pla
y The
ASSYSTPL US service interva ldispla yon the
inst rument displa yinf orms youof thetime ordis-
ta nce remainin gbef oreth ene xt ser vice duedate.
Yo ucan hide this ser vice displa yusing theG
bac kbutt ononthesteer ing wheel.
Depending onhowtheve hicle isused, the
ASS YSTPL US service interva ldispla yma yshor ten
th eser vice interva l,e.g. inthefo llo wing cases :
R Mainl yshor t-dist ance driving
R When theengine isoTen leTidling forlong
per iods
R Intheev ent offreq uent coldstar tphases
Mer cedes-Benz recommen dsavo iding suchoper -
ating conditions.
Yo ucan obtain information concerningtheser vic-
ing ofyour vehicle from aqu ali/ed special ist
wo rkshop, e.g.an aut hor izedMer cedes- BenzCen -
te r. DisplaDispla
yingt ying
the ser he
ser vice duedate vice
duedate On-boar
dcom puter:
4 Service 5
ASSYST PLUS
The next ser vice duedateis displa yed. #
T T
o e o
exit t xit
the displa y he
displa y: :
pr ess thebac kbutt on
G onthesteer ing wheel.
Bear inmind thefo llo wing relat ed topic:
R Oper ating theon-boar dcom puter
(/ page223). InfInf
or or
mation onr mation
onregular maint egular
maintenance w enance
wor k or
k *
N NO O
TE TE
Prematur ewe arthro ugh failur eto
obser veser vice duedates Main
tenanc ewo rkwhic his no tcar ried out at
th eright time orinco mplete ly can lead to
incr eased wearand damag eto theve hicle. #
Adher eto thepr escr ibed service inter-
va ls. #
Alwaysha ve thepr escr ibed maint enance
wo rkcar ried out ataqua li/ed specialist
wo rkshop. NNo o
t t
es on special ser es
on special service r vice
req eq
uir uir
emen ts emen
ts The
prescr ibed service interva lis based onnor -
mal oper ation oftheve hicle. Have themaint e-
nance workcar ried out mor eoTen than prescr i-
bed ifoper atingcond itions aredi1cu ltor the
ve hicle issubj ecttoincr eased stress.
The ASSYSTPL US service interva ldispla yis onl y
an aid. Itis there sponsi bilityof thedr iver ofthe
ve hicle tohave maint enance workcar ried out
mor eoTen than prescr ibed duetoactual operat-
ing cond itions and/ orstre sses.
Ex am ples ofarduous operatingcond itions:
R Regula rcity driving withfreq uent intermedi ate
st ops
R Mainl ysh ort-dist ance driving
R Freq uent operation inmount ainous terrain or
on poor road sur faces Main
tenanc eand care
271 271

R
When theengine isoTen leTidling forlong
per iods
R Oper ation inpar ticular lydust ycondition s
and/or ifair -recir culation modeisfreq uentl y
used
In these orsimilar operating conditions, have the
int erior air/lter,air /lter,engine oiland oil/lter,
fo rex am ple, chang edmor efreq uen tly. Ifsubj ect
to incr eased stress, checkth etir es mor e.Further
inf ormatio ncan beobt aine dat aquali/ed special-
is two rkshop. Bat
t Bat
ter er
ydiscon nectionper y
discon nectionperiods iods
The
ASSYST PLUS service interva ldispla ycan cal-
culat eth eser vice duedateonl ywhen thebatt ery
is connect ed. #
Displa yand note down theser vice duedate
on theinst rument displa ybef oredisconne ct-
ing thebatt ery(/ page271). Engine
com Engine
compar par
tment tment
Opening
andclosing t Opening
andclosing the hood he
hood &
W W
ARNIN G ARNIN
GRisk ofaccident duetodriving
wit hth ehood unlocked
The hood mayope nand blockyour vie w. #
Neverre lease thehood when driving. #
Beforeev erytrip, ensur eth at thehood is
loc ked. &
W W
ARNIN G ARNIN
GRisk ofaccident andinjury
when openingand closin gth ehood
The hood maysuddenl ydr op intoth eend
position.
Ther eis arisk ofinjuryfo ran yone inthe
hood's rang eof mo vement. #
Donotopen orclose thehood ifth er eis
a per son inthehood's rang eof mo ve-
ment. &
W W
ARNIN G ARNIN
GRisk ofbur nswhen openin gth e
hood
If yo uopen thehood intheev ent ofan ove r-
heat edeng ineor/rein theengine compart-
ment, thefo llo wing situations mayoccur :
R Youma ycome intocont actwithho tga ses.
R Youma ycome intocont actwithot her
escapin gho toper ating0uids. #
Beforeopen ingthehood, allowthe
engine tocool down. #
Intheev ent ofa/r ein theengine com-
par tment, keep thehood closed andcall
th e/r eser vice. &
W W
ARNIN G ARNIN
GRisk ofinjur ydue tomo ving
par ts
Com ponen tsintheengine compartment may
continue torunor star tune xpectedl yev en
when thedr ive sy stem isswitc hedo..
Obser vethefo llo wing ifyo umust open the
hood: 272272
Main
tenanc eand care

#
Switcho. theve hicle. #
Neverto uc hth edang erzones surround-
ing moving components, e.g.thero tation
ar ea ofthefa n. #
Remo vejewe leryand watches . #
Keep items ofclo thing and hair away
fr om moving parts. &
W W
AR NIN G AR
NIN GRisk ofinjuryfrom touc hing live
com ponents
The ignition system and thefuel injection sys-
te m oper atewit hahigh voltag e. Youcould
re ceiv ean elect ric shoc k. #
Neverto uc hcom ponents oftheignition
sy stem orfuel injection system when the
ve hicle isswitc hedon. The
livecom pone ntsincl ude thefo llo wing, for
ex am ple:
R Ignition coils
R Fuelinject ors R
Electr iclines totheignition coilsandthefuel
inject ors &
W W
ARNING ARNING
Riskofbur nsfrom hotcom po-
nent partsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
GRisk ofinjur yfrom using the
wind shield wiperswhen thehood isopen
If th ewindshield wipersst ar tmo ving when the
hood isopen ,yo ucould betrapped bythe
wiper linkage . #
Alwaysswitc ho. thewindshield wipers
and theve hicle /rst ifyo uneed toopen
th ehood. Opening
t Opening
the hood he
hood #
Torelease thehood, pullonhandle 1. Maint
enance andcare
273 273

#
Push handle 1ofthehood catchupw ards
and liTthehood untilitopens automaticall y.
Closing t Closing
the hood he
hood #
Lowe rth ehood toaheig htofaroun d8 in
(20 cm) andthen allo witto fall, appl ying alit-
tle forc eas youletit go. #
Ifth ehood canstillbeliTed slightl y,open the
hood again and close itwit halit tle mor efo rc e
until iteng ages cor rectl y. Engi
neoil Engi
neoil ChecChec
kingt king
the eng ineoillev he
eng ineoillevel using t el
using the oildips he
oildips tick tic
k &
W W
ARNIN G ARNIN
GRisk ofbur nsfrom hotcom po-
nen tpar tsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. RR
eq eq
uir uir
ements ements
R The engine hasanoildipstic k.Ifno t,the
engine oilleve lcan becheckedonl ywit hth e
on-boar dcom puter(/ page275) .
Dependin gon theengine, theoil dipstic kma ybe
inst alled intheengine compartment indi.er ent
locations. The
waiting time beforech ecking theoil leve l
when theengine isat nor mal oper ating temp era-
tur eis /veminut es. #
Park theve hicle onaleve lsur face. #
Pulloil dips tick1 out and wipe o.. 274274
Main
tenanc eand care

#
Slowly slide oildips tick1 intoth eguide tube
to thestop, and pullitout again aTer approx-
imat elyth re eseconds.
R Oilleve lis cor rect: oilleve lis be tween 2
and 3.
R Oilleve lto olow: oil leve lis at 3 orbelo w.
R Oilleve lto ohigh: oilleve lis abo ve2 . #
Ifth eoil leve lis toolow, add 1.1USqt(1liter)
of eng ineoil. #
Ifth eoil leve lis toohigh, drain o.excess
eng ineoil.Visit aqu ali/ed special istwo rk-
shop.
Chec Chec
kingt king
the eng ineoillev he
eng ineoillevel usin gt el
usin gthe on- boar d he
on- boar d
com com
put put
er er
R R
eq eq
uir uir
emen ts: emen
ts:
R The enginehas been warmed up.
R The vehicle ispar kedon aleve lsur face.
R The engineisrunning atidle speed.
R The hoodis clo sed .
The engine oilleve lis de term ined during driving.
De term ining theengine oilleve lcan take up to 30
minut eswithanor mal driving styleand even
long erwit han activ edr iving style.
On-boar dcom puter:
4 Service 5
Engine OilLevel
One ofthefo llo wing messa geswill appear onthe
inst rument displa y:
R Measuring EngineOil Level... :meas urement
of theoil leve lis no tye tpos sible. #
Repeat there qu est aTer amaximum of
30 minut es'driving.
R Engine OilLevel OKand thebar displa yfo r
indicating theoil leve lon theinst rument dis-
pla yis green and isbe tween "min" and"max":
th eoil leve lis cor rect.
R Engine OilLeve lAdd 1.0land thebar displa y
fo rindicating theoil leve lon theinst rument
displa yis orang eand isbelo w"min": #
Add1.1 USqt(1l)of engin eoil.
R Red uce Engine OilLevel andthebar displa y
fo rindicating theoil leve lon theinst rument
displa yis orang eand isabo ve"max": #
Drain o.anyex cess engineoilthat has been
added. Todo so, consult aqua li/ed specialist
wo rkshop.
R For Engine OilLeve lSwi tch Ignition On #
Switchon theve hicle tocheckth eengine oil
le ve l.
R Engine OilLevel System Inoperative: Theoil
le ve lsensor isdef ectiv eor notconnect ed. #
Consult aqua li/ed specialist workshop.
R Engine OilLeve lSys tem Currentl yUnav ail. #
Close thehood.
T T
op upengine oil op
upengine oil &
W W
ARNIN G ARNIN
GRisk ofbur nsfrom hotcom po-
nent partsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. Maint
enance andcare
275 275

&
W W
ARNI NG ARNI
NGRisk of/reand injur yfrom
engine oil
If engine oilcom esintocont actwit hho tcom -
ponent partsintheengine compartment, it
ma yignit e. #
Mak esur eth at no eng ineoilisspill ed
ne xt to the/ller opening. #
Allo wtheengine tocool o.and thor -
oughl yclean theengine oilfrom com po-
nent partsbef orestar ting theve hicle. *
N NO O
TE TE
Eng inedamag ecaused byan inco r-
re ct oil /lter,incor rect oil oradditi ves #
Donotuse engin eoils oroil /lterswhic h
do notcor respond tothespeci/c ations
ex plicitl ypr escr ibed forth eser vice inter-
va ls. #
Followtheinst ruction son theser vice
int erva ldispla yfo rch ang ingtheengine
oil and obser vethepr escr ibed chang e
int erva ls. #
Donotuse additiv es. *
N NO O
TE TE
Damag ecaused byre/ll ing too
muc hengi neoil To
omuc hengin eoil can damag eth eengine or
th ecat alytic converter . #
Have excess engineoilremo vedat a
qu ali/ed special istwo rkshop. %
Depen dingon drivi ng style, theve hicle con-
sumes upto0.9 USqt(0.8 liter s) of oil per
600 miles (1,000 km).Theoilconsum ption
ma ybe higher than this when theve hicle is
ne wor ifyo ufreq uentl ydr ive at high engine
speeds. #
Turn cap 1count er-cloc kwise andremo veit. #
Addengin eoil. #
Replace cap1and turnit cloc kwise untilit
eng ages. #
Chec kth eoil leve lag ain (/ page274). 276276
Maint
enance andcare

ChecChec
kingt king
the coolant lev he
coolant level el
&
W W
ARNIN G ARNIN
GRisk ofbur nsfrom hotcom po-
nent partsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
GRisk ofscalding from hotcool-
ant
If yo uopen thecap, youcould bescalde d. #
Letth emo torcool down beforeopening
th ecap. #
When opening thecap, wearprotectiv e
glo vesand safetygl asses. #
Open thecap slowly torelease pressur e. #
Park theve hicle onaleve lsur face. #
Chec kth ecoolant temp eratur edispla yon the
inst rument displa y.
The coolant temp eratur emust beinthebo t-
to m quarterof thete mp eratur eindicat or. #
Slowly turncap 1count er-cloc kwiseto
re lease overpressur e. #
Con tinue turnin gcap 1coun ter-cloc kwise
and remo veit.
The coolant leve lis cor rect inthefo llo wing cases :
R Ifth eengine iscold, thecoolant isup to
mar kerbar 2.
R Ifth eengine iswa rm,th ecoolant isup to
0.6 in(1.5 cm)overth emar kerbar 2. #
Ifnecessar y,re/ll withcoo lantth at has been
appr ovedfo rMer cedes-Benz.
% Further informatio non coolan t(/ page346) AA
ddin g ddin
g0uid 0uid
t t
o t o
the wind shield w he
wind shield washer syst asher
system em
&
W W
AR NIN G AR
NIN GRisk ofinjurydue tomo ving
par ts
Com ponen tsintheengine compartment may
continue torunor star tune xpectedl yev en
when thedr ive sy stem isswitc hedo..
Obser vethefo llo wing ifyo umust open the
hood: #
Switcho. theve hicle. Main
tenanc eand care
277 277

#
Neverto uc hth edang erzones surround-
ing moving components, e.g.thero tation
ar ea ofthefa n. #
Remo vejewe leryand watches . #
Keep items ofclo thing and hair away
fr om moving parts. &
W W
AR NIN G AR
NIN GRisk ofbur nsfrom hotcom po-
nen tpar tsintheengine compartment
Cer tain com ponent partsintheengine com-
par tment canbevery hot,e.g .th eengine, the
cooler andpartsof theex haus tsy stem. #
Allow theengine tocool down and only
to uc hcom ponent partsdescr ibedinthe
fo llo wing. &
W W
ARNIN G ARNIN
G‑Risk of/reand injur yfrom
windshield washer conce ntrate
Wi ndsh ieldwasher conce ntrate ishighl y0am-
mable. Itcould igniteif it comes intocont act
wit hho tengine component partsor the
ex haus tsy stem. #
Mak esur eth at no wind shield washer
conce ntrate spill sout next to the/ller
opening. #
Remo vecap 1using tab. #
Addwa sher 0uid.
% Further informatio non wind shield washer 0uid
(/ page347) KK
eepi ngt eepi
ngthe air/ w he
air/ wat at
er duct fr er
duct free ee
#
Keep thear ea between thehood andthe
wind shield free ofdeposi ts,e.g.ice, snowor
lea ves. Clean
ingand care Clean
ingand care InfInf
or or
matio non w matio
non washing t ashing
the v he
vehicle inacar w ehicle
inacar wash ash
&
W W
AR NIN G AR
NIN GRisk ofacciden tdue to
re duced braking e.ect aTerwashing the
ve hicle
The braking e.ect isreduced aTerwashing
th eve hicle. #
ATer theve hicle hasbeen washed, brak e
car efull ywhile paying attent ion tothe
tr a1 cco nd itio ns untilth ebr aking e.ect
has been fullyre stor ed . 27
8 27
8 Ma
intena ncean dca re