engine MERCEDES-BENZ E-CLASS SEDAN 2018 Service Manual

openthec ap, youc ould be scalded byhot
coolant spr aying out.
#Le tthe mo torc ool down befor eopening
th ec ap.
#When opening thec ap, wearglove sand
pr otectiv eeyewe ar.
#Slowl yturnt he cap half aturntoa llow
pressur etoescape.
#Park thev ehicle on alevel sur face.
#Chec kthe coolant temp eratur edispla yint he
instrument clus ter.
The coolant temp eratur emustbeb elow
15 8°F( 70 °C).
#Slowly tur ncap 1 counter-clockwise to
re lie ve exc ess pressure.
#Continue turning cap 1counter-clockwise
and remo veit.
The coolan tleve lisc orrect:
Rifth ee ngine is cold up tomar kerb ar2
Rifth ee ngine is warm upto0.6 in (1.5 cm)
ove rmarke rb ar2
#If necessar y,topupw ithc oolant that has
been appr ovedbyM ercedes-Benz.
RFurther information on coolant (→pag e392)
Adding washer fluid tothew indshield
wa sher sy stem
&
WARNING Risk of burn sfromh otcom‐
ponent parts in thee ngine compartment
Cer tain component parts in thee ngine com‐
partmen tcan be very hot, e.g. thee ngine,
th ec ooler and parts of thee xhaust system.
#Le tthe engine cool down and only
to uc ht he component parts described
as follo ws .
&
WARNING Danger of burn swhen open‐
ing theh ood
If yo uo pen theh ood when thee ngine has
ove rheated or during afireint he engine
compartment, youc ould come int ocontact
wit hh otgases or other escaping operating
fl uids.
#Befor eopening theh ood, allo wthe
engine tocool down.
Maintenance and care 325

#Inthee vent of afireint he engine com‐
partment, keep theh ood closed and
call thef ires ervice.
&
WARNING ‑Riskoff irea nd injur yfrom
windshield washer concentrate
Wi ndshield washer concentrat eishighly
fl ammable. It coul dignit eifitc omes into
con tact wi thhote ngine component parts or
th ee xhaust system.
#Mak esuret hat no windshield washer
concentrat espills out next tothef iller
opening.
#Re mo vecap 1bythet ab.
#Topupt hewasher fluid.
Cleaning and care
Informa tiononw ashingt hevehicl einac ar
wa sh
&
WARNING Risk of accident duet o
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 suntilthe braking
ef fect hasb eenf ully restored.
To avo id damag etoyourvehicle when using a
car wash, ensur ethe following beforehand:
RAc tiveD ista nce Assist DISTRONICa ndthe
HOLD functio naredeactivated.
RThe 360° came raor ther eversing camera is
switched off.
RThe side windo wsand slidings unroof are
comple tely closed.
326
Maintenance and care

#When givingstartin gassis tance, al ways
mak esuret hat youo nly connec tbat‐
te ry term inals wit hidentical polarity.
#During startin gassis tance, youm ust
observ ethe described order forc on‐
necting and disconnecting thej umper
cables.
#Do no tconnect or disconnect theb at‐
te ry cla mp sw hile thee ngine is running.
&
WARNING Risk ofexplosion during
ch argingp rocess and startin gassis tance
During thec harging process and starting
assis tance, theb atter ymayrelease an explo‐
siv eg as mixture.
#Avoid fire ,o pen flames,c reating spar ks
and smoking.
#Mak esuret hat ther eiss ufficient venti‐
latio ndurin gthe chargingp rocess and
during startin gassis tance.
#Do no tlea no verab atter y.
Ifth ei ndicator/warning lamps in thei nstrument
clus terdon otlight up at lo wtemperatures, it is
ve ry likel ythat thed ischar gedb atter yhas fro‐
zen.
& WARNING Risk ofexplosion from afro‐
zen battery
Ad ischar gedb atter ymayfreeze at temp era‐
tures slightl yabove or belo wfreezing point.
During startin gassis tance or batter ycharg‐
ing, batter ygas ma ybereleased.
#Alwayst hawaf roze nb atte ryout firs t
befor echarging it or per form ing start‐
ing assis tance.
The service li feof ab atter ythat has been
th awe dmaybe dramaticall yshor tened.
It is recommended that youh ave athawe db at‐
te ry checkedataq ualified specialis tworks hop. All
vehicles
* NO
TEDama gecaused bynumerouso r
ex tende dattem ptstos tart thee ngine
Nume rous or extende dattem ptstos tart the
engine ma ydamag ethe catalytic con verter
due tonon-combu sted fuel.
#Av oid numerous and extende dattem pts
to star tt he engine.
Obser vethef ollowing points during starting
assis tance and when chargingt he battery:
ROnlyuse undamaged jumper/charging
cables wit hasufficient cross-section and
insula tedt erminal clamps.
RNon- insulated parts of thet erminal clamps
mus tnotcom eintoc ontact wi thother me tal
parts while thej umper/charging cable is
connected totheb attery/jump-s tart connec‐
tion point.
RThe jumper/charging cable mus tnotcome
int oc ontact wi thanyp arts whic hmaymo ve
when thee ngine is running.
Breakdown assist ance34
3

RAlwaysm akes uret hat neither youn orthe
batter yiselectrost aticallycharged.
RKeep away from fire and open flames.
RDo no tlean overthe batter y.
RWhencharging: onlyuse batter ychargers
te sted and appr ovedbyM ercedes-Benza nd
re ad theb atter ychar ger's operating instruc‐
tions befor echarging theb atter y.
Obser vethea dditional following point sduring
st artin gassis tance:
RSt artin gassis tance ma yonly be pr ovided
using batteries wit hanominal voltag eof
12 V.
RThe vehicles mus tnot to uch.
RGasoline engine: onlyaccep tstartin ga ssis‐
ta nce if thee ngine and exhaus tsystema re
cold.
#Secur ethe vehicle byapplying thee lectric
parking brake.
#Au tomatic transmission: shiftthet ransmis‐
sion toposition j.
#Makesuret hat thei gnition and all electrical
consumer sareswitched off.
#Open theh ood.
#Slide co ver1 of positiv eclamp 2onthe
jump-s tarting connection point in thed irec‐
tion of thea rrow .
#Connect positiv eclamp 2onyour vehicle to
positiv epole of thed onor batter yusing the
jumper/charging cable .Alway sb egin with
positiv eclamp 2onyour ow nv ehicle firs t.
#Du ring thes tarting assistance proce ‐
du re:st ar tt he engine of thed onor vehicle
and runati dles peed.
#Connect then egativ epole of thed onor bat‐
te ry and ground po int3 ofyour ow nv ehicle
by usingt he jumper/charging cable. Begin
wit hthe donor batter yfirst .
#Du ring starting assist ance:star tt he
engine of your ow nv ehicle.
#During thec hargingp roce ss: star tt he
ch argingp rocess.
#During starting assist ance:lett he engines
ru nf or se veralm inutes.
#During starting assist ance:beforediscon‐
necting thej umper cable, switc honanelec‐
trical consumer in your ow nv ehicle, e.g. the
re ar wind owheater or lighting.
When thes tartin ga ssis tance/charging process
is compl ete:
34 4
Breakdown assis tance

Installingthe towing eye
#Press them arkonc over 1 inwa rdsa nd
re mo ve.
#Scr ew inthet ow ing eye clockwise as farasi t
wil lgoa nd tighten.
% Mak esuret hat co ver1 engages in the
bumper when your emo vethet ow ing eye. *
NO
TEDama gedue toincor rect us eof
th et ow ing eye
When atow ing eyeisu sedtoreco verav ehi‐
cle, thev ehicle ma ybedamaged in thep roc‐
ess.
#Onl yusethet ow ing eyetot owaway or
to ws tartthe vehicle.
To ws tarting thev ehicle (emer gency engine
st arting)
Ve hicles with automatic transmission
* NO
TEDama getothea utomatic trans‐
mission due to towstarting
The automatic transmissionm aybe damaged
in thep rocess of tows tartin gv ehicles with
automatic transmission.
#Ve hicles wit hautomatic transmission
mus tnotbe tows tarted.
#Ve hicles wit hautomatic transmission must
no tbet ow st arted.
Electrical fuses
Note sone lectrical fuses
&
WARNING Risk of accident and injury
due to ov erloaded lines
If yo um anipulat eorbridg eaf aulty fuse or if
yo ur eplace it wit hafuse wit hahigher
amperage, thee lectric line could be overloa‐
ded.
This could result in afire.
#Alwa ys replace faulty fuse swiths peci‐
fi ed ne wfuses conta iningthe cor rect
amperage.
* NO
TEDama gecaused byincor rect fuses
Incor rect fuses ma ycause damag etoelectri‐
cal components or sy stems.
#Onl yuse Mercedes-Benz appr oved
fuse switht he cor rect fus erating.
Blow nfuses must bereplaced wit hfuses of the
same rating ,which youc an recognize bythec ol‐
our and fuse rating .For fuses in thee ngine com‐
350
Breakdown assis tance

partmentand trunk ,onlyu sethose fuses
mar kedw ithan" S". The fuse rating sarelist ed in
th ef use assignmen tdiagram.
Fu se assignment diag ram: onthef use bo xin
th et runk (
→pag e353).
* NO
TEDama geor malfunctions caused
by moisture
Moistur emaycause dama getothee lectrical
sy stem or cause it tomalfunction.
#When thef use bo xisopen, mak esure
th at no moistur ecan enter thef use
box.
#When closing thef use box, mak esure
th at thes eal of thel id is positioned cor‐
re ctly on thef use box.
Ifth en ewlyinser tedf use also blo ws,have the
cause trace dand rectifie dataq ualified special‐
is tw orks hop, e.g. aMercedes-Benz Service Cen‐
te r.
Ensure thef ollowing befor ereplacing afuse:
RThe vehicle is secured agains trolling away.
RAll electrica lconsumer sareswitched off.
RThe ignition is switched off.
The electrica lfus es ar eloc ated in various fuse
bo xes:
RFu se bo xont he driver's side of thee ngine
compartmen t(→page351)
RFu se bo xont he driver's side of thec ockpit
(→pag e352)
RFuse bo xinthe front passenger foot we ll
(→pag e352)
RFuse bo xinthe trunk on ther ight-hand side
of thev ehicle, when vie wedint he direction
of tr avel(
→pag e353)
Fuse bo xinthe engine compartment
Obser vethen otes on electrical fuses
(→pag e350).
Re quirements:
RYoun eedad ryclo thand ascrew driver. Opening
&
WARNING Risk of injury from usingthe
windshield wiper swhile thee ngine hood
is open
When thee ngine hood is open and thew ind‐
shield wiper saresetinm otion ,you can be
trappe dbythe wiper linkage.
#Alw ayss witc hoffthew indshield wipers
and ignition befor eopening thee ngine
hood.
Breakdown assis tance 351

Aluminum hubcap
#Toremo ve:positio nsocket2 on hubc ap
1.
% The soc ketc an be found inthet ire-change
to ol kit.
#Po sition wheel spanner 3on soc ket2.
#Using whee lspa nner 3,turnh ub cap 1
counter-clo ckwise and remo veit.
#To install: position hub cap 1and tur nuntil
it is comple tely flush withthe wheel.
#Position soc ket2 on hubc ap1.
#Attach wheel spanner 3tosoc ket2 and
tighten theh ub cap clockwise.
Specified tightening torq ue: 18lb-ft
(25 Nm).
#Ra ise thev ehicle (→pag e379).
Raising thev ehicle when changing awheel
Requirements:RTher eareno persons in thev ehicle.
RThe vehicle has been prepared foraw heel
ch ang e(→pag e378).
RThe hub caps ha vebeen remo ved
(→pag e378).
Impo rtant no tesonu singthej ack:
Ronl yusethev ehicle-specific jac kthat has
been tested and appr ovedbyM ercedes-Benz
to raise thev ehicle.
Rthej ackiso nlyd esigned forr aising and hold‐
ing thev ehicle foras horttime while awheel
is being changed and no tfor maintenance
wo rkunder thev ehicle.
Rthej ackm ustbep laced on afirm, flat and
non-slip sur face. If necessar y,use alarge ,
load-bearing, non-slip underla y.
Rthef ootoft he jac kmustbep ositioned verti‐
call yunder thej acks uppor tpoint.
Rules of conduct when thev ehicle is raised:
RNe verp lace your hands or feet under the
ve hicle.
RDo no tlie under thev ehicle.
RDo no tstar tthe engine and do no trelease
th ee lectric parking brake.
RDo no topen or close an ydoor sort he trunk
lid.
Wheels and tires 37
9

Thefollowing can be used in thev ehicle without
re strictions:
Rtwo-w ayradios wit hamaximum transmission
output of up to100m W
Rtwo-w ayradios wit htransmit terf requ encies
in the3 80 -410 MHz frequency band and a
maximu mtransmissiono utputofu pto2 W
(trunked radio sy stem/T etra )
Rmobilep hones (2G/3G/4G)
Ther eareno restrictions whe npositioning the
antenn aonthe outside of thev ehicle fort he fol‐
lowing frequenc ybands:
RTrunked radio sy stem/T etra
R70 cm frequency band
R2G/3G/4G
Ve hicl eidentification plate, VIN and engine
number
Ve hicl eidentification plate
Vehicle identification plat e(US Ao nly)
1Perm issible grossmass
2Pe rm issible front axle load
3Perm issible rear axle load
4Pa int code
5VIN (vehicle identification number)
386
Tech nica ldata

Vehicle identification plat e(Canada only)
1Perm issible grossmass
2Pe rm issible front axle load
3Perm issible rear axle load
4Pa int code
5VIN (vehicle identification number)
The maximum permissible gross vehicle weight
is made up of thev ehicle weight,a llve hicle
occupants, thef uel and thel oad. The maximum
permissible axle load is them aximum weight
th at can be car ried on one axle (front or rear
axle). Ne
vere xceed them aximum gross vehicle weight
or them aximum permissible axle load fort he
front or rear axle.
VIN in front of ther ight-hand front seat
1VIN (vehicle identification number)
2Floor co vering Ad
ditional plates
1Pla tewit hinformation about emissions test‐
ing, including con firm atio nofe missions
guidelines at theU .S.federal le velasw ell as
fo rC alifornia
2Engine number (s tamp ed int othe crankcase)
3VIN (vehicle identification number)
Tech nica ldata 38
7

&WARNING Risk of injury from fuel
Fu els ar epoisonous and harmful to your
health
#Do no tswa llowf uel or letitc omeinto
contact withs kin, eyes or clo thing.
#Do no tinhale fuel vapors.
#Ke ep children away from fuel.
If yo uoro ther people come int ocontact with
fuel, obser vethef ollowing:
#Immediatel yrins efueloffyo ur skin wit h
soap and water.
#If fuel comes int ocontact wit hyour
ey es, immediatel yrins ethem thor‐
oughl ywithc lean water.Seek medical
attentio nimmediately.
#Ifyo us wallowf uel, seek medical atten‐
tio nimmediatel y.Do no tinduce vomit‐
ing.
#Chang eimmediately out of clo thing that
has com eintoc ontact wi thfuel.
Fuel
Information on fuel grades forv ehicles with
ag asoline engine
Observ ethe no tesono perating fluids
(
→pag e388).
* NO
TEDama gecaused bythew rong fuel
Even small amounts of thew rong fuel could
re sult in damag etothe fuel sy stem, the
engine and thee mission control sy stem.
#Onl yrefuel wit hlow -sulfur premium
grade fuel.
Thi sfuel ma ycontain up to10 %e thanol.
Yo ur vehicle is suitable foru se wit hE10 fuel.
Do no trefuel using:
RDiesel
RE15, E85, E100
RGasoline containing me thano l(M15, M30,
M85 ,M100)
RGasolinew itha dditives con tainin gm etal
If yo ua ccidenta llyrefuel wit hthe wrong fuel:
#Do no tswitc hthe ignition on.
#Consult aqualified specialis tworks hop.
Ifth ea vailable fuel is no tsufficiently lo winsul‐
fur ,this can produce unpleasant odors.
Onl yrefuel wit hfuel that has at leas tthe octane
number specified in thei nstruction label in the
fuel filler flap (
→pag e147).
If yo uw ant maxi mume ngine output: only
re fuel wit hunleade dpremiumg rade gasoline
wit hano ctane number of at leas t91AKI/
95 RON.
As atemporar ymeasure, if ther ecommended
fuel is no tavailable, youm ayalso refuel with
unleade dregular gasoline wit hanoctane num‐
ber of at leas t87AKI/91RON. This ma yreduce
engine output and increase fuel consum ption.
Ne verrefuel using gasoline wit halowerRON.
Tech nica ldata 38
9