engine MERCEDES-BENZ G-CLASS 2020 Repair Manual

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.
* 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 tactwi th 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.
Obser vetheadditional follo wing pointsdur ing
st ar tin gassis tance:
R Startin gassis tance mayonly beprov ided
using batteries withanom inalvoltag eof
12 V.
R The vehicles mustno tto uc h.
R Gasoline engine :On lyacc eptst ar tin gassis ‐
ta nce ifth eengine andexhaus tsy stem are
cold. St
arting assistance andchargin gth e12 V
batt ery Re
quirement s
R The vehicle issecur edwithth eelectr icpar k‐
ing brak e.
R The transmiss ionisin position 005D. Br
eakdo wnassis tance 37
5

R
The ignition andallelectr icalconsumer sar e
switc hedoff.
R The hood isopen. #
Slide cover1 ofposi tiveclam p2 onthe
jum p-starting con nection point inthedir ec‐
tion ofthear row . #
Con nect posi tiveclam p2 onyour vehicle to
th epositiv epole ofthedonor batteryusing th
ejum per cable/c harging cable. Always
begin withpositiv eclam p2 onyour ow n
ve hicle firs t. #
During star ting assistance :st ar tth e
engine ofthedonor vehicle andrunat idle
spe ed. #
Connect theneg ativepole ofthedonor bat‐
te ry and grou nd point 3 ofyour ow nve hicle
by usin gth ejum per cable/c harging cable.
Begin withth edonor batteryfirs t. #
During star ting assistance :st ar tth e
engine ofyour ow nve hicle. #
Dur ing thech argin gpr oc ess :st ar tth e
ch argin gpr oce ss. #
Dur ing star ting assistance :le tth eengines
ru nfo rse veralmin utes. #
Dur ing star ting assistance :bef oredis con‐
necting thejum per cable, switchon anelec‐
tr ical consumer inyour ow nve hicle, e.g.the
re ar wind owheat eror lighting.
When thest ar tin gassis tance/c harging proce ss
is com plet e: #
First,re mo vethejum per cable/c harging
cable from ground point 3and theneg ative
pole ofthedonor battery, then from positiv e
clam p2 and thepositiv epole ofthedonor
batt ery. Begi nea ch tim ewi th thecon tacts
on your ow nve hicle firs t. #
Afterre mo ving thejum per cable/c harging
cable, closecover1 ofposi tiveclam p2.
Fu rther information canbeobt ained ataqu ali‐
fi ed specialis two rkshop. Re
plac ingthe 12Vbatt ery #
Obs erve theno teson the12 Vbatt ery
(/ page37 2).
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. 37
6
Brea kdo wnassista nce

Esp
ecially so ifth eve hicle isladen.
R Neveratt em pttoreco vera ve hicle that is
st uc kwit hatrailer attached.
R Pull outtheve hicle that isstuc kbac kwards,
if poss ible, usingth etra cksit made beforeit
became stuc k. To
wing vehicl eaw ay intheeve ntofmalf unc‐
tions No
teson towing away intheev ent ofma l‐
fun ctions
* NO
TEDama gedue toinc orrect att ach‐
ment anduseof old nuts The
vehicle andcomponent sof theve hicle
can bedamag eddue toinc orrect att achment
and useof old nuts. #
Ifyo ure mo vethepr opeller shaft,place
th eM1 0nuts ontheM8 bolts as
spacer sand secur eth em withM8 nuts. #
Alw aysuse newself-loc kingnuts when
ins talling thepr opeller shafts. Obser
vetheno teson towing away
( / pag e37 7).
% Forfur ther information ,con sult anaut hor‐
ized Mercedes- BenzCenter.
To wing away intheev ent ofma lfun ctions
To wing away intheev ent ofdama getothe
engine, transm ission orelectr ics #
Shif tth etra nsmiss iontoposition 005C.
To wing away intheev ent oftransf ercase
da ma ge #
Remo vethepr opeller shaftsbetween the
axle sand thetransf ercase.
To wing away intheev ent offront axle dam‐
ag e #
Remo vethepr opeller shaftbe tween there ar
axle andthetransf ercase. #
Tow aw ay theve hicle withara ised front axle.
To wing away intheev ent ofrear axle dam‐
ag e #
Remo vethepr opeller shaftbe tween thefront
axle andthetransf ercase. #
Tow aw ay theve hicle withara ised rear axle
and withwheel roller sunder thefront axle. Loading
theve hicl efo rtr ans port #
Obser vetheno teson towing away
( / pag e37 7). #
Con nect theto w bar totheto wing eyein
or der toload theve hicle. #
Shif tth eaut omatic transmiss iontoposition
005C.
% The automatic transm ission maybe locked
in posit ion005Dintheeve ntofdama getothe
electr ics.Toshif tto 005C ,pr ov ide theon-
boar delectr icalsystem withpo we r
( / pag e37 5). #
Load theve hicle ontoth etra nspor ter. #
Shif tth eaut omatic transmiss iontoposition
005D. #
Use theelectr icpar king brak eto secur eth e
ve hicle agains tro lling away. #
Onlysecur eth eve hicle bythewheels. 380
Breakdo wnassis tance

#
Mak esur eth at thefront and rear axle scom e
to rest on thesame transpor tatio nve hicle.
* NO
TEDama getothedr ivet ra in due to
inc orrect pos itioning #
Donotpos ition theve hicle abovethe
connecti onpointofthetranspor tve hi‐
cle. Po
sition oftowing eyes To
wing eyes 1 areatt ached tothefront and
re ar oftheve hicle. To
w- star ting theve hicl e(eme rgency engine
st ar t) *
NO
TEDama getotheaut omatic trans‐
mission duetotow star tin g The
automat ictransm issionma ybe damag ed
in thepr ocess oftow star tin gve hicles with
aut omatic transmission. #
Vehicles withaut omatic transmission
mus tno tbe tow star ted. #
Donotto w- star tth eve hicle. Elec
trical fuses No
teson electr icalfuses &
WARNIN GRisk ofacci dent andinjury
due tooverloaded lines
If yo uman ipulat eor bridg eafa ulty fuse orif
yo ure place itwit hafuse withahigher
am per age, theelectr icline could beove rloa‐
ded.
This could result inafire . Br
ea kdo wnassista nce 38
1

#
Alw aysre place faulty fuseswit hspec i‐
fi ed newfuses containin gth ecor rect
am per age. *
NO
TEDama gedue toinc orrect fus es Electr
icalcom pone ntsorsystems maybe
damag edbyinc orrect fus es, ortheir func ‐
tion ality maybe signif icantlyim pair ed. #
Onlyuse fuses that have been approved
by Mer cedes-Ben zand whic hha ve the
cor rect fus era ting . Blo
wn fuse smu stbe replaced withfuses ofthe
same rating ,wh ich yo ucan recogni zeby the
colo rand fusera ting .The fuse rating sand fur‐
th er information tobe obser vedcan befound in
th efuse assignmen tdiagr am.
Fu se assignment diagram: onthefuse boxin
th ere ar passe nger com partment (/ page38 3). *
NO
TEDama geormalfunct ionscaused
by mois ture Mois
turema ycause damagetotheelectr ical
sy stem orcause itto malfu nction. #
When thefuse boxis open, makesur e
th at no mois turecan enterthefuse
bo x. #
When closing thefuse box,mak esur e
th at theseal ofthelid isposition edcor‐
re ctly onthefuse box. If
th ene wlyinser tedfuse alsoblows,ha ve the
cau setrace dand rectif ied at aqu alif ied spec ial‐
is two rkshop.
Ensur eth efo llo wing beforere placing afuse:
R The vehicle issecur edagains tro lling away.
R Allelectr icalconsu mersar esw itched off.
R The igniti onissw itched off.
The electr icalfu ses arelocat ed invarious fuse
bo xes:
R Fuse boxin theengine compartmen ton the
lef t-hand side(/page382) R
Fuse boxon theright-h andside ofthecoc k‐
pit (/ page383)
R Fuse boxin there ar passe nger com partment
(/ page38 3) Open
ingand closing thefus ebo xin the
engine compartmen t Re
quiremen ts:
R Adr yclo thand asc rewdr iver areav ailable.
Obse rveth eno teson electr icalfuses
(/ page38 1).
Opening &
WARNIN GRisk ofinju ryfrom using the
winds hieldwiper swhile theengine hood
is open
When theengine hoodisopen andthewind‐
shield wipersar ese tin mo tion ,yo ucan be
tr apped bythewiper linkage. #
Alw aysswitc hof fth ewindshield wipers
and ignition beforeopening theengine
hood. 382
Breakdo wnassis tance

R
The requ ired tire-c hang eto ol isavailable. If
yo ur vehicle isno teq uipped withth etir e-
ch ang eto ol kit, consult aqu alif ied spec ialist
wo rkshop tofind outab ou tsu itab letools.
R The vehicle isno ton aslope.
R The vehicle ison solid, non-slipper yand leve l
gr ou nd . #
Apply theelectr icpar king brak emanually . #
Movethefront wheels tothest ra ight -ahead
posit ion. #
Shif tth etra nsmiss iontoposition 005D. #
Switc hof fth eengine. #
Mak esur eth at theengine cannotbe star ted. #
Place choc ks orother suitable items under
th efront and rear ofthewheel that isdiago‐
nall yoppos ite th ewheel youwish tochang e. #
Remo vethehub caps ifneces sary
(/ page40 7). #
Raise theve hicle (/page408). Re
mo ving and inst alli ng hub caps Re
quirement s:
R The vehicle isprepar edfora whee lch ang e
(/ page40 6).
Pla stic hub cap #
Toremo ve:tur nth ecent ercoverof thehub
cap count er-cloc kwise andremo vethehub
cap. #
Toins tall: makesur eth at thecent ercover
of thehub capistur ned count er-cloc kwise. #
Position thehub capand turnth ecent er
co vercloc kwise untilthehub capengages
ph ysicall yand audibly . Alum
inum hubcap #
Toremo ve:po sitio nsoc ket2 onhubcap
1.
% The socketcan befound inthetir e-c hang e
to ol kit. #
Position wheel wrenc h3 onsoc ket2. #
Usingwheelwr enc h3, turnhu bcap 1
cou nter-clo ckwise andremo veit. #
Toins tall: posit ionhub cap1and turnunt il
it is com pletely flush withth ewheel. #
Position socket2 onhubcap 1. Wh
eelsand tires 40
7

R
The jackmus tbe placed onafirm ,fl at and
no n-slip surface. Ifneces sary,use alar ge,
fl at, load- bearing,no n-slip unde rlay .
R The jackma yonl ybe positioned atthejac k
suppor tpoint .
Ru les ofcon duct when theve hicle israised:
R Neverpla ceyour han dsorfeet und erthe
ve hicle.
R Neverlie under theve hicle.
R Donotst ar tth eengine anddonotre lease
th eelectr icpar king brak e.
R Donotopen orclose anydoor sor there ar-
end door . #
Usin gth elug wrenc h,loosen thewheel bolts
on thewheel youwish tochang eby about
on efull turn.Do notuns crew thebolts com‐
ple tely. &
WARNIN GRisk ofinju ryfrom incor rect
pos itioning ofthejac k
If yo udo notposi tionth ejac kcor rectl yat
th eappr opriatejac king point oftheve hicle,
th ejac kcould tipwithth eve hicle raised. #
Onlyposit ionthejac kat theappr opri‐
at ejac king point oftheve hicle. The
base ofthejac kmus tbe position ed
ve rticall yunder thejac king point ofthe
ve hicle. *
NO
TEVehicle damag efrom thejac k If
yo udo notposi tionth ejac kcor rectl yat
th eappr opriatejac ksuppor tpoint ofthe
ve hicle, thejac kcould tipove rwit hth eve hi‐
cle raised. #
The jackis design edexclu sively for
jac king uptheve hicle atthejac ksup‐
por tpoints . Ra
ising theve hicl eat thefront #
Mak esur eth at theadap teris secur edon the
jac k. Wheels
andtires 409

Ve
hicl eiden tificati onplat e,VIN and engine
number
Ve hicl eiden tificati onplat e Ve
hicle identif ication plate(US Aonl y)
1 Maximum gross vehicle weight
2 Perm issible front axle load
3 Perm issible rear axle load
4 Paint code
5 VIN (vehicle identificat ion numb er) Ve
hicle identif ication plate(Canada only)
1 Maximum gross vehicle weight
2 Perm issible front axle load
3 Perm issible rear axle load
4 Paint code
5 VIN (vehicle identificat ion numb er)
The permissib legross vehicle weight ismade up
of theve hicle weight ,all vehicle occupants, the
fuel andtheload. Themaximum gross axle
we ight rating isthemaximum weight that can be
car ried on one axle (front orrear axle ). Te
ch nica lda ta 41
5

Ne
verexc eed theper missible gross vehicle
we ight orthemaximum gross axle weight rating
fo rth efront orrear axle .
VIN onthech assi s 1
Imprint ed VIN (vehi cle identif icati onnumbe r)VIN
atthelo we redg eof the winds hield 1
VIN (veh icleidenti ficati onnumb er)aslabel Ad
diti onalplat es 1
Platewit hinf ormat ionabout emissionstest‐
ing, including confirm atio nof emis sions
guideli nesattheU. S. feder alleve las wellas
fo rCa lifor nia
2 Engine number stam ped intoth ecr ankc ase Oper
ating fluids No
teson oper ating fluids Mer
cedes- AMG vehicl es:besur eto obser ve
th eno tesin theSupplement .Ot her wise, you
ma yfa ilto recogni zedangers. 41
6
Tech nica lda ta

#
Immedia tely rinse fuelof fyo ur skin wit h
soap andwater. #
Iffuel comes intocont actwithyo ur
ey es, immediat elyrinse them thor‐
oughl ywit hclean water.Seek medical
att entio nimm ediately . #
Ifyo usw allo wfuel, seek medicalatten‐
tio nimm ediat ely. Do notind uce vomit‐
ing. #
Cha ngeimmedi ately out ofclo thing that
has com eint ocon tact with fuel . Fu
el No
teson fuel grades forve hicl eswith aga s‐
oline engine
Obser vetheno teson oper ating fluids
(/ page41 6).
* NO
TEDama gecau sed bythewr ong fuel Ev
en small amounts ofthewr ong fuelcould
re sult indamag eto thefuel system, the
engine andtheemission control system. #
Onlyre fuel withlow- sulfur unleade d
fuel.
This fuelmaycont ainupto10%ethanol by
vo lume. Your vehicle issuit able foruse with
E1 0fuel .
Ne verre fuel withone ofthefo llo wing fuels:
R Dies el
R Gasoline withmor eth an 10%ethanol by
vo lume, e.g.E15, E8 5,E100
R Gasoline withmor eth an 3% methano lby
vo lume, e.g.M15,M30 ,M85 ,M1 00
R Gasoline withadditiv escon tainin gme tal
If yo uha ve acc iden tally re fuel edwithth e
wr ong fuel: #
Donotswit chon theignition . #
Consult aqu alif ied spec ialistwo rkshop. If
th eav ailable fuelisno tsuf ficie ntly low in sul‐
fur ,th is can produce unpleasant odors. Onl
yre fuel withfuel that has atleas tth eoct ane
number specifiedintheins truction labelinthe
fuel filler flap (/ page15 2).
If yo uwa ntmaxim umengine output:onl y
re fuel withunle adedpr emiu mgrade gasoline
wit han oct ane number ofat leas t91 AKI/
95 RON.
As ate mp orarymeasur e,ifth ere comme nded
fue lis no tav ailable, youma yalso refuel with
unle adedre gular gasoline withat leas t87 AKI/
91 RON.Thisma yre duce engineoutput and
incr ease fuelconsum ption.
Ne verre fuel using gasoline withalowe rRO N.
* NO
TEPrema turewe arthro ugh unleaded
re gular gasoline Un
leade dre gular gasoline cancause the
engine towe armor equ ickl yand impair lon‐
ge vity and perform anc e.
If unle aded premium grade gasoline is
una vailable andyouha ve torefuel using
unle adedre gular gasoline: 41
8
Tech nica lda ta