Page 217 of 348

#
Inthee vent of afireint he engine com‐
partment, keep theh ood closed and call
th ef ires ervice. &
WARNING Risk of inju rydue tomoving
parts
Cer tainc omponents in thee ngine compart‐
ment ma ycontinue tomo veor suddenly
mo veagain even af tert he ignition has been
switched off, e.g. thec ooler fan.
Ma kesur eoft hefollowing befor eperform ing
ta sk sint he engine compartment: #
Switc hthe ignition off. #
Nevertouc hthe danger zone sur round‐
ing movin gcomponent parts ,e.g.t he
ro tatio na reaoft hefan. #
Remo vejewe lrya nd watches. #
Keep items of clo thing and hair away
from moving parts. &
WARNING Risk of inju ryfrom touching
component parts unde rvoltage
The ignition sy stem and thef uel injection sys‐
te mw orku nde rhigh voltage. If yout ouch
component parts whic hareunde rvoltage,
yo uc oul drecei vean electric shoc k. #
Nevertouc hcomponent parts of the
ignition sy stem or thef uel injection sys‐
te mw hen thei gnition is switched on. Liv
ec omponents of thef uel injection sy stem
include thei njec tors,for example.
Liv ec omponent softhe ignition sy stem include
th ef ollowing, fore xamp le:
R Ignitio ncoils
R Spar kplug connec tors
R Diagnostic soc ket &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponents in thee ngine compart‐
ment can be very hot, e.g. thee ngine, the
ra diator and parts of thee xhau stsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. If
yo uh ave tocar ryout an yworkint he engine
compartment, touc ho nlyt he following compo‐
nents:
R Hood
R Engine oil filler openin gcap
R Washer fluid reser voir cap
R Coolant expansion reser voir cap &
WARNING Risk of inju ryfrom using the
windshield wiper swhile thee ngine hood
is open
When thee ngine hood is open and thew ind‐
shield wiper saresetinm otion, youc an be
trapped bythew iper linkage. #
Alwayss witc hoffthew indshield wipers
and ignition befor eopening thee ngine
hood. #
Park thev ehicle in asafel ocation and on a
le ve ls urface if possible. #
Switc hoffthee ngine. #
Secur ethe vehicle agains trolling away. &
WARNING Risk of inju rywhen theh ood
is opened
When youo pen theh ood, it ma ysuddenly
drop int othe end position.
Ther eisar isk of injur yfor an yone in the
hood's rang eofm ovement. #
Befor ereleasing theh ood, ensur ethat
th es uppor tisfirmlyseatedint he
holder. #
Open theh ood onl ywhen ther eisn o-
one in theh ood's rang eofm ovement. Maintenance and care
215
Page 218 of 348

#
Toopen: pull handle 1torelease theh ood. #
Reachi ntot he gapa nd push theh ood catch
handle upwards. #
Open theh ood and hold it up. #
Take support 1from theb rack et on the
hood and pull it down wards. #
Inse rtthes uppor tint ot he brac ketb elow 2. &
WARNING Risk offire due toflammable
material in thee ngine compartmen tor
th ee xhau stsystem
Clo thsoro ther flammable materials lef tin
th ee ngine compartmen tbymista ke could
igni teupon coming int ocontact wi thhots ec‐
tions of thee ngine or exhaus tsyst em. #
Ensur ethat ther ea reno flammable
ex tern al materials in thee ngine com‐
partmen torontheexhaus tsyst em
af te rm aintenance workhas been con‐
ducted. &
WARNING Risk of accident and inju ry
when opening and closing thee ngine
hood
When opening or closing thee ngine hood, it
ma ysuddenl ydropi ntot he end position.
Ther eisar isk of injur yfor an yone in the
engine hood's rang eofm ovement. #
Only open or close thee ngine hood
when ther ea reno persons in thee ngine
hood's rang eofm ovement. *
NO
TEDama getotheh ood Pushing
theh ood closed wit hyour hands
could dama geit. #
Toclos ethe hood, le titdropf romt he
specified height. #
Toclose: liftt he hood slightl y. #
Movesupport 1totheb rack et on theh ood
and apply light pressur etoengageit. #
Lowe rthe hood and le titdropf romah eight
of appr oximately 0.5 ft(15c m). #
If it is still possible toliftt he hood alittle,
open theh ood again and le titdropf roma
height of appr oximately 0.7 ft(20 cm) until it
engages cor rectly. Engin
eoil Che
cking thee ngine oil le velw ithad ipst ick &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponent pa rtsint he engine com‐
partment can be very hot, e.g. thee ngine, the
cooler and pa rtsoft heexhaus tsystem. #
Letthe engine cool down and only
to uc ht he component parts described
as follo ws. Depending on
thee ngine, thed ipstic kmaybe in
va rying locations in thee ngine compartment.
Wa itin gtimeb efor echecking theo il le vel:
R engin eatn ormal operatin gtemperature:
fi ve minutes
R engine no tatnormal operating temp erature
(the engine waso nlys tarted briefly ,for exam‐
ple): 30 minutes 216
Maintenance and care
Page 219 of 348

Dip
stick( example) #
Park thev ehicle on an even sur face. #
Remo vedipstick 1and wipe it off. #
Slowl yinser tdipstick 1intot he dipstick
guide tube as farasitw illgoa nd pullito ut
af te rt hree seconds.
R Oil le velO K:theo il le velisb etwe en the
MIN and theM AX mar k.
R Oil le veltoo low: theo il le velisatt he MIN
mar korb elow. #
Ifth eo il le velist oo lo w,add appr ox.
1. 1USq t(1l iter) engine oil. #
Ifth eo il le velist oo high, drain of fexcess
engine oil.
Vi sit aq ualified specialis tworks hop.
Checking thee ngine oil le velw itht he on-
boa rdcompu ter
Re quirements:
R The vehicle is le veld uring them easuring
process.
R The hood is no topen.
R Dependin gonthe driving profile, theo il le vel
can be displa yedo nlya fter ad riving time of
up to30 minutes and onl ywhen thei gnition
is switched on.
On-boar dcomputer:
4 Service 5
Engine Oil Level
Yo uw ills ee one of the following messa geson
th em ultifunction displa y: #
Measuring Engine Oil Level...:m easurement
of theo il le veln ot ye tpossible. Repeat the
qu erya fter drivin gfor am aximu mof
30 minutes. #
Engine Oil Level OK andtheb ar showing the
oil le velont he multifunction displa yisgreen
and lies between "MIN" and "MAX": theo il
le ve lisO K. #
Engine Oil Level Drive until the engin eis
warm. :warmupt he engine tooperating tem‐
perature. #
Engine Oil Level Correct Measurement Only
if Vehicl eIsonL evel Ground:p arkt he vehicle
on aleve lsurface. #
Engine Oil Leve lAdd 1,0 liq.gal. andtheb ar
showing theo il le velont he multifunction dis‐
pla yiso rang ea nd lies belo w"MIN": add
1. 1USq t(1l)ofe ngine oil. #
Reduce Engine Oil Level andtheb ar showing
th eo il le velont he multifunction displa yis
orang eand lies abo ve"MAX": drain of fexcess
engine oil.
Vi sit aq ualified specialis tworks hop. #
For Engine Oil Level Switch Ignition On :
switc hont he ignition in order tocheckt he
engine oil le vel. #
Engine Oil Level System Inoperative:t he sen‐
sor is defectiv eornotconnected. Visit a
qu alified specialis tworks hop. #
Engine Oil Level System Currently Unavaila-
ble:c losetheh ood.
% Ve
hicles with col doil le veld ispla ys:theo il
le ve lisa utomaticall ydispla yedont he multi‐
function displa yafter thev ehicle has been
non-operational forane xtende dperiod .Ifit
is no tpossible tomeasu rethee ngine oil
le ve l,ac orresponding messag ewill appear.
Ad ding engin eoil &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponents in thee ngine compart‐
ment can be very hot, e.g. thee ngine, the
ra diator and parts of thee xhau stsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. &
WARNING Danger of bu rnsw hen open‐
ing theh ood
If yo uo pen theh ood when thee ngine has
ove rheated or during afireint he engine com‐
partment, youc oul dc om eintoc ontact wi th
ho tg ases or other escaping operating fluids. Main
tenance and care 217
Page 220 of 348

#
Befor eopening theh ood, allo wthe
engine tocool down. #
Inthee vent of afireint he engine com‐
partment, keep theh ood closed and call
th ef ires ervice. If
yo uh ave tocar ryout an yworkint he engine
compartment, touc ho nlyt he following compo‐
nents:
R Hood
R Engine oil filler openin gcap
R Washer fluid reser voir cap
R Coolant expansion reser voir cap &
WARNING Risk offire and injur yfrom
engine oil
If engine oil comes int ocontact wi thhotc om‐
ponent parts in thee ngine compartment, it
ma yignite. #
Mak esuret hat no engine oil is spilled
next tothef iller opening. #
Allowthe engine tocool of fand thor‐
oughly clean thee ngine oil from compo‐
nent parts befor estartin gt he vehicle. *
NO
TEEngine damag eduetoincor rect oil
fi lter ,incor rect oil or additi ve #
Do no tuse engine oi loranoilfilter with
specifications deviatin gfromt hose
re qu ired fort he prescribed service
inter vals.
Mercedes-Benz recommends using original or
te sted replacement and service parts. #
Do no tchang ethe engine oil or oil filter
in order tosetc hang einter vals longer
th an those prescribed. #
Do no tuse an yadditive. #
Followt he instructions on thes ervice
inter vald ispla yfor changing thee ngine
oil. *
NO
TEDama gecaused byaddin gtoo
muc hengine oil To
om uche ngine oil can damag ethe engine
or thec atalytic con verter. #
Have excess engine oil remo vedata
qu alified specialis tworks hop. Engine OM651
Engine OM642
#
Turn cap 1counter-clockwise and remo veit. #
Adde ngin eoil. #
Replace cap 1and tur nitclockwise until it
engages. #
Chec kthe oil le vela ga in. Chec kusing theo n-
boar dcomputer (/ page217),ch eckw ith
th eo il dipstic k(/pag e216). Checking
thec oolant le vel &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponents in thee ngine compart‐
ment can be very hot, e.g. thee ngine, the
ra diator and parts of thee xhau stsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. 218
Maintenance and care
Page 221 of 348

If
yo uh ave tocar ryout an yworkint he engine
compartment, touc ho nlyt he following compo‐
nents:
R Hood
R Engine oil filler openin gcap
R Washer fluid reser voir cap
R Coolant expansion reser voir cap &
WARNING Danger of bu rnsw hen open‐
ing theh ood
If yo uo pen theh ood when thee ngine has
ove rheated or during afireint he engine com‐
partment, youc oul dc om eintoc ontact wi th
ho tg ases or other escaping operating fluids. #
Befor eopening theh ood, allo wthe
engine tocool down. #
Inthee vent of afireint he engine com‐
partment, keep theh ood closed and call
th ef ires ervice. &
WARNING Risk of scalding from hot
coolant
The engine cooling sy stem is pressurized,
particular lywhen thee ngine is warm.Ify ou
open thec ap, youc oul dbes calded byhot
coolant spr aying out. #
Letthe engine cool down befor eopen‐
ing thec ap. #
When opening thec ap, wear pr otective
gl ove sand saf etyg lasses. #
Open thec ap slowl ytorelease pres‐
sure. Allo
wthe engine and thee ngine cooling sy stem
to cool down befor echecking thec oolant le velor
re filling coolant.
* NO
TEPaint wo rkdamag eduetocoolant If coolant
getsonp ainted sur faces, thep aint‐
wo rkcan be damaged. #
Addc oolant carefully. #
Remo vespilledc oolant. Checking
thec oolant le vel Example: coolant
expansion reser voir #
Park thev ehicle on an even sur face. #
Ope nthe hood (/ page214). #
Slowly tur ncoolant expansion reser voir cap
1 half aturnc oun ter-clockwise and allow
exc ess pressur etoescape. #
Turn coolant expansion reser voir cap 1fur‐
th er and remo veit. #
Chec kthe coolant le vel.
Ther eise nough coolan tincoolan texpansion
re ser voir if thec oolant reaches theM AX
mar k.
Ad ding coolant #
Refill th ec oolant totheM AX mar konthe
coolant expansion reser voir.
Onl yuse coolan tappr oved byMercedes-Benzto
avo id damagin gthe engine cooling sy stem. #
Replace coolant expansion reser voir cap 1
and tigh tenina clockwise direction. #
Startt he engine. #
Aftera pproxima tely five minutes, switc hoff
th ee ngine again and allo wittocool down. #
Che ckthec oolant le vela ga in and add coolant
if necessar y.
% Obser
veadditional coolant information
(/ page283). Main
tenance and care 219
Page 222 of 348

Fi
lling up thew indshield washer sy stem &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponents in thee ngine compart‐
ment can be very hot, e.g. thee ngine, the
ra diator and parts of thee xhau stsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. If
yo uh ave tocar ryout an yworkint he engine
compartment, touc ho nlyt he following compo‐
nents:
R Hood
R Engine oil filler openin gcap
R Washer fluid reser voir cap
R Coolant expansion reser voir cap &
WARNING Danger of bu rnsw hen open‐
ing theh ood
If yo uo pen theh ood when thee ngine has
ove rheated or during afireint he engine com‐
partment, youc oul dc om eintoc ontact wi th
ho tg ases or other escaping operating fluids. #
Befor eopening theh ood, allo wthe
engine tocool down. #
Inthee vent of afireint he engine com‐
partment, keep theh ood closed and call
th ef ires ervice. &
WARNING ‑Riskoff irea nd injur yfrom
windshiel dwashe rconcentrate
Wi ndshield washer concentrat eishighlyflam‐
mable. It could ignit eifitcomes int ocontact
wi th hote ngine component parts or the
ex haus tsystem. #
Mak esuret hat no windshield washer
concentrat espills out next tothef iller
opening. *
NO
TEDama getothee xterio rlighting
due tounsuitable windshield washer fluid Uns
uitable windshield washer fluid ma ydam‐
ag et he plastic sur face of thee xterio rlighting. #
Onlyuse windshield washer fluids that
ar ea lso suitable foru se on plast ic sur‐
fa ces, e.g. MB SummerFit or MB Winter‐
Fit. Ad
ding washer fluid Wa
sher fluid reser voir (e xamp le) #
Pre-mix thew ashe rfluid in thec orrect mixing
ra tio in acontainer. #
Park thev ehicle on alevel sur face and secu re
it agains trolling away ( /pag e140). #
Ope nthe hood (/ page214). #
Pullthe cap of thew ashe rfluid con tainer 1
upwards bythet ab. #
Pour in thep re-mixed washer fluid. #
Press cap 1onto thef iller openin guntil it
audibly engages. #
Close theh ood (/ page214).
% Mix
thew ashe rfluid wit hwindshield washer
concentrat eallye ar round. Compl ywitht he
information about windshield washer fluid in
th et echnical dat a(/ pag e283).
% Compl
ywitht he fur ther information about
windshield washer fluid (/ page283) Cleaning
thew ater drain valveoft he air
intak ebox &
WARNING Risk of inju rydue tomoving
parts
Cer tainc omponents in thee ngine compart‐
ment ma ycontinue tomo veor suddenly
mo veagain even af tert he ignition has been
switched off, e.g. thec ooler fan.
Ma kesur eoft hefollowing befor eperform ing
ta sk sint he engine compartment: #
Switc hthe ignition off. 220
Maintenance and care
Page 223 of 348

#
Nevertouc hthe danger zone sur round‐
ing movin gcomponent parts ,e.g.t he
ro tatio na reaoft hefan. #
Remo vejewe lrya nd watches. #
Keep items of clo thing and hair away
from moving parts. &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponents in thee ngine compart‐
ment can be very hot, e.g. thee ngine, the
ra diator and parts of thee xhau stsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. If
yo uh ave tocar ryout an yworkint he engine
compartment, touc ho nlyt he following compo‐
nents:
R Hood
R Engine oil filler openin gcap
R Washer fluid reser voir cap
R Coolant expansion reser voir cap #
Open theh ood (/ page214). #
Remo vedirtfromw ater drain valve 2 of air
intak ebox1 . Draining
thef uel filter &
WARNING Danger of fire and explosion
due tofuel
Fu els ar ehighly flammable. #
It is essential toavoid fire ,o pen flames,
smokin gand creating spar ks. #
Befor efilling up, switc hoffthee ngine,
and, if applicable, thea uxiliar yheating. &
WARNING Risk offire and explosion due
to fuel
Fu els ar ehighly flammable. Ther eisarisk of
fi re and explosion due tocontact wi thhot
component parts. #
Allowthe engine and thee xhau stsys‐
te mtoc ool down. *
NO
TEEngine damag eduetodela yed
drainag eofthe fuel filter Ve
hicles with adiese lengine: delayed
drainag eofthe fuel filter can lead toengine
damage.
If the 003A indicator lam plights up, drain the
fuel filter immediately. +
ENVIRONMENTAL
NOTEEnvironmental
pollution du etodisposal in anon-envi‐
ro nmental ly-friendly manner #
Dispose of thew ater/fuel mixtur einan
environmentally-friendly manner. OM642 engine
#
Park thev ehicle in asafel ocation and secure
it agains trolling away. #
Switc hoffthea uxiliar yheating
(/ page106). #
Switc hoffthee ngine. #
Open theh ood (/ page214). Maintenance and care
221
Page 224 of 348

#
Place asuitable collector beneat hdrain hose
2. #
Switc hont he ignition. #
Open drain scr ew1 until thew ater/fuel
mixtur eemerges from drain hose 2.#
Close drain scr ew1 as soon as around
0. 2qt( 0.2l iter) of thew ater/fuel mixtur ehas
been collected.
Af ter30s econds, thee lectrical fuel pump
automaticall ystops thed ischarg eofthe
wate r/fuel mixture. #
Afterd raining, switc hoffthei gnition. #
Dispose of thec ollected water/fuel mixture
in an environmentally responsible manner,
e.g. at aqualified specialis tworks hop. #
Chec kthat drain scr ew1 has been closed.
If th ee ngine is running whil edrain scr ew 1
is open, youw ill lose fuel thro ugh drain hose
2. #
Close theh ood (/ page214). #
003A The indicator lam pdoes no tgoo ut
af te rd raining: drainthe fuel filter again. #
003ATh eindica torlam pd oesn otgo out
af te rt he second draining: consultaquali‐
fi ed specialis tworks hop.
Mercedes-Benz recommends that youh avet he
fuel filter drained at aqualified specialis twork‐
shop. Cleaning and care
Note
sonw ashingthe vehicl einana utomatic
car wash &
WARNING Risk of accident du eto
re duced braking ef fect af terw ashing the
ve hicle
The braking ef fect is reduced af terw ashing
th ev ehicle. #
Aftert he vehicle has been washed,
brak ecarefully while paying attention to
th et raffic condition suntil theb raking
ef fect has bee nfully restored. *
NO
TERisk of damag etothe paintwork
and plastic components If
yo uw ash your vehicle in Touchles sAuto‐
matic Car Wash sy stems that use special
cleaning agents, thec leaning agentsu sed can damag
ethe paintwor korplastic components
of thev ehicle. #
Do no twash thev ehicle in Touchless
Au tomatic Car Wash sy stems that use
special cleaning agents. Mak
esuret hat thea utomatic car wash is suitable
fo rt he size of thev ehicle.
Befor ewashing thev ehicle in an automatic car
wa sh, fold in theo utside mir rors and remo veany
additional antennas. Otherwise, theo utside mir‐
ro rs,a ntennas or thev ehicle itself could be dam‐
aged.
Mak esurea nyadditional antennas ar ere-in stal‐
led and that theo utside mir rors aref ullyf olded
out again when youl eave thea utomatic car
wa sh.
To avo id damag etoyourvehicle, obser vethef ol‐
lowing befor eusing an automatic car wash:
R thes ide windo wsand thes liding windo ware
comple tely closed.
R theb lowe rfor ventilation and heating is
switched off.
R thew indshield wiper switc hisinposition005A.
If th ev ehicle is very dirty ,wash of fexcess dirt
befor ecleaning thev ehicle in an automatic car
wa sh.
% Re
moving thew ax from thew indshield and
th ew iper rubber safter wa shing thev ehicle,
will help avoid smearing and reduce wiper
noise. Note
sonu se ofapowe rwasher &
WARNING Risk of accident whe nusing
high-pressu recleaning equipment wi th
ro und-spr aynozzles
The wate rjet from around-spra ynozzle (dirt
grinder) ma ycaus edamag etotires and sus‐
pension components that is no tvisible.
Component sdamaged in this wa ym ayfail
unexpec tedly. #
Do no tuse high-p ressur ecleaning
equipment wit hround-spra ynozzle sto
clea nyour vehicle. #
Damaged tires or suspension compo‐
nentsm ustber eplaced immediatel y. Ne
veru se ap owe rwashe rinthevehicle interior.
The pressurized watercreated bythep ower 222
Maintenanc eand care