
#
When driving on unpa vedr oads or off-
ro ad, regular lych eckt he vehicle under‐
side. #
Remo vetrappe dplants or other flam‐
mable material. #
Ifth er eisd amage, consult aqualified
specialis tworks hop immediately. *
NO
TEDama getothev ehicle af terd riving
off-road When driving off-road or on unpa
veds urfa‐
ces, fore ign bodies suc hasstones and
branches could become trapped on thev ehi‐
cle underside, on wheels and tires, causing
damag etothevehicle.
Fo reign bodies could cause thef ollowing
damage:
R Damag ethe suspension, thef uel tank or
th eb rake system.
R Disturb theb alance and cause vibrations. #
Regular lyremo veanyt rapped fore ign
bodies, e.g. stones and branches. #
Afterd riving off-road, checkc arefully
whe ther ther eisa nydamag etothe
ve hicle. #
Ifth er eisd amage, ha vethev ehicle
ch eckedataq ualified specialis twork‐
shop. When driving off-road or on unpa
veds urfaces,
ch eckt he vehicle underside, wheels and tires
re gularly at regular inter vals. In particular,
re mo veanyt rapped fore ign bodies, e.g. stones
and branches.
Obser vethef ollowing no tesr egarding fore ign
bodies of this kind:
R Theym aydamag ethe suspension, thef uel
ta nk or theb rake system.
R Theym aydisturb theb alance and cause
vibrations.
R Theym aybe flung out from thev ehicle when
yo uc ontinue driving.
If th er eisa nydamage, infor maqualified special‐
is tw orks hop.
When driving off-road on steep inclines, youm ust
mak esuret hat theD EFtank is su fficientl yfilled.
Therefore, ensur ealevelofatl eastten liters
befor eoff-road driving. When driving off-road and on con
stru ction sites,
sand ,mud and water,also mixed wit hoil, can get
int ot he brakes. This ma ylead toareduction in
braking ef fect or total brak efailure, also as a
re sult of increased wear.T he brakin gcharacteris‐
tics will vary depending on them aterial that has
go tint ot he sy stem. Clean theb rake sa fter driv‐
ing off-road. If yout hen notice areduced braking
ef fect or hea rscraping noises, ha vetheb rake
sy stem checkedi mmediately at aqualified spe‐
cialis tworks hop. Adjus tyour driving styletot he
ch anged brakin gcharacteristics.
Driving off-road or on construction sites increa‐
ses thep ossibility of vehicle damag ewhichm ay
in tur nlead tothef ailur eofc ertain major assem‐
blies and sy stems. Adapty our driving styletot he
off-road driving conditions. Driv ecarefull y.Ha ve
an yv ehicle damag erecti fied at aqualified spe‐
cialis tworks hop as soon as possible.
When driving on rough cross-countr yterrain, do
no ts hif tthe transmission int othe neutral posi‐
tion and do no tdisengag ethe clutch. Youc ould
lose control when attem pting tobrak ethe vehicle
wit hthe service brake. If your vehicle cannot
manag eanuphill incline, driv ebackd ownin
re ve rseg ear.
When loading your vehicle foro ff-road driving or
on aconstruction site, keep thev ehicle's center
of gr avity as lo waspossible.
Checklis tbefor eoff-road driving
R Chec kthe fuel and DEF le vels (/ page158)
and add if necessa ry (/ pag e125).
R Engine: checkt he oil le vela nd add oil if nec‐
essar y(/pag e183). Befor edriving up or
down extreme incline sorslopes,fill th eo ilto
th em aximum le vel.
% If
yo ud rive up or down extreme incline sor
slopes, the00B2 symbol ma yappear in the
multifunction displa y.The engine operating
saf etyisn otput at risk if youh ave filled the
engine oil tothem aximum le velb efor ethe
journe y.
R Vehicl etool kit: checkt hat thej ackisw ork‐
ing (/ page227).
R Mak esuret hat alug wrenc h(/ pag e227), a
wo oden underla yfor thej ack, ar obus ttow
ro pe, afolding spade and awheel choc ka re
car ried in thev ehicle.
R Tire sa nd wheels: checkt he tir etread dep th
( / pag e209) and thet irep ressure
(/ page216). Driving and pa
rking 111

%
Ve
hicles with adiese lengine and incor‐
re ct fueling pr otector agains trefueling
wit hgasoline: thef iller nec kisdesigned for
re fueling at diesel filling pumps forp assenger
ve hicles. %
Ve
hicles with adiese lengine without
incor rect fueling pr otector: youc an also
re fuel at adiesel filling pum pfor truc ks.
% If
th ef uel tank ha sbeenr un comple tely dr y,
add at leas t1.3gal(5l)off uel. Problems wit
hthe fue land fuel tank Problem
Possible causes/consequences and 0050 0050Solutions
Fu el is leaking from the
ve hicle. The fuel line or
thef uel tank is de fective. #
Apply thep arking brake. #
Switc hoffthee ngine. #
Remo vethek eyfrom thei gnition loc k.
Or ,onv ehicles wit hKEYLESS‑GO: #
Open thed rive r's door.
The on-boar delectronics ar einposition 005A.This cor responds tothe
"k ey remo ved". #
Do no tres tart thee ngine under an ycircums tances. #
Consult aqualified specialis tworks hop.
The engine does not
st art. The fuel
tank ha sbeenr un comple tely dr y. #
Refuel thev ehicle wit hatleast1.3gal(5l)off uel. #
Swit chthei gnition on fora pproxima tely tens econds. #
Startt he engine continuously foram aximu moften seconds until it
ru ns smo othly.
If th ee ngine does no tstart: #
Switc hthe ignition on fora pproxima tely tens econds. #
Startt he engine continuously foram aximu moften seconds until it
ru ns smo othly.
If th ee ngine does no tstart afte rt hree attem pts: #
Consult aqualified specialis tworks hop. DEF
Note
sonD EF
* NO
TEWhe nyou open theD EFtank,
small amounts of ammoni avapor may
escape. #
OnlyfilltheD EFtank in well-ventilated
areas. #
Do no tlet DE Fc om eintoc ontact wi th
skin, eyes or clo thes. #
Keep DEFa wayfromc hildren. *
NO
TEDo no tinges tDEF. If DEF is swallo
wed: #
Immediatel yrins eo utyour mout hthor‐
oughly. #
Drink plenty of water. #
Seek medica lattentio nimmediately. *
NO
TEDama gecaused byadditives in
DE Forbyd iluting DEF The DEFe
xhaustgasa ftertreatment sy stem
could be destr oyed bythef ollowing:
R Additives in DEF Driving and parking
127

Ad
ding DEF
* NO
TEEngine damag eduetoDEF being
in thef uel #
DEFm ustn otbe used tofill th ef uel
ta nk. #
Only us eDEFtofill th eD EFtank. #
Do no toverfill theD EFtank. *
NO
TEContamination of thev ehicle inte‐
ri or due toDEF leakage #
Aftera dding, careful lyclos ethe DEF
re fill con tainer. #
Avoid car rying DE Frefill container sper‐
manentl yinthevehicle. Re
quirements:
R The ignition is switched off
The following messages that appear in succes‐
sion in them ultifunction displa yindicat ethat you
need torefill th eD EFtank:
R Refil lAdditive See Operator's Manual
The DEF tankhasfallen belo wthe firs tw arn‐
ing thre shold.
R Refill Additive Starts until Emerg. Op.: XXX
See Operator's Manual
The DEF supply has fallen belo wthe reser ve
mar k.
Af tert he messag eappear sfor thef irst time,
th er emaining DEF suppl ywill las tfor appr ox‐
ima tely 1,200 mile s(1,900 km) .The engine
can then onl ybestarted ano ther 16 times.
The numbe rofremaining engine starts XX(16
to 1) is shown in them essag eevery time the
engine is star ted.
R Refill Additiv eEmergenc yOp.: XXX mph See
Operator's Manual
Yo uc an only driv ethe vehicle at amaximum
speed of 5mph (8 km/h).
Yo uc an also ha vetheD EFfill le vela nd theD EF
ra ng ed ispl ay ed (/ page128). Openin
gthe DEF filler cap on filler caps that
ar en otloc kable #
Open theh ood. #
Turn DEF filler cap 1coun ter-clockwise and
re mo veit.
Opening theD EFfiller cap on loc kable filler
caps #
Open theh ood. #
Take tool 4 foru nlocking DEF filler cap 1
from thev ehicle tool kit. Driving and parking
12 9

#
Pull co ver3on DEF filler cap 1up, turn
90° and release. #
Inser ttool 4in holes 2of DEF filler cap
1. #
Turn DEF filler cap 1coun ter-clockwise and
re mo veit.
Preparing theD EFrefill canis ter Va
riant 1 Va
riant 2 #
Unscr ewthec ap on DEFr efill canister2. #
Screw disposable hose 1ontothe opening
of DEF refill canis ter2 until hand-tight. Ad
ding DEF Va
riant 1 Va
riant 2 #
Screwd isposable hose 2ontothe filler neck
of thev ehicle until hand-tight. #
Liftupa nd tip DEF refill canis ter1.
The filling proces sstops when theD EFtank is
comple tely full.
DEF refill canis ter1 can be remo vedw hen it
has been onl ypartiall yemp tied. #
Unscr ewdisposable hose 2and close DEF
re fill canis ter1 inreve rseo rder. #
Switc hont he ignition foratl east 60 seconds. #
Startt he vehicle.
% Av
oid storing DEF container spermanent lyin
th ev ehicle.
DEF refill bottle
Onl yscrew theD EF ref ill bottle hand-tigh tonto
th ef iller openin ginthe engine compartment. It
ma yotherwise be damaged. 13 0
Driving and pa rking

DEF
refill bottles 1can be obtained at man ygas
st ations or at aqualified specialis tworks hop.
Re fill bottles without athreadedc ap offerno
ove rfill pr otection .DEF mayleak out as aresult
of ove rfilling. Mercedes-Benz of fers special refill
bottles wit hathreadedc ap. Theseareavailable
at an yauthorize dMercedes-Ben zCenter. #
Unscr ewthep rotectiv ecap from DEFr efill
bottle 1. #
Place DEFr efill bottle1as shown on filler
opening 2and scr ewit on clockwise until
hand-tight. #
Press DE Frefill bottle 1towa rdsf iller open‐
ing 2.
The DE Ftank is filled. This could takeupto
one minute.
% When
theD EFrefill bottle is no longer
pressed down, filling stops. The bottle can be
re mo vedw hen it has been onl ypartially emp‐
tied. #
Release DE Frefill bottle 1. #
Turn DEF refill bottle 1coun ter-clockwise
and remo veit. #
Screwt he pr otectiv ecap ont oDEFrefill bot‐
tle 1 again.
Fi lling procedur ewitht he pum pnozzle of an
DEF filling pump #
Inser tthe pum pnozzle int othe filler nec kand
add DE F.When doing so, do no toverfill the
DEF tank.
Closin gthe DE Ffiller cap on filler caps that
ar en otloc kable #
Afterf illing theD EFtank ,p lace DEF filler cap
1 onthef iller nec kand tigh tenitc lock wise. #
Turn theD EFfiller cap until thel ette ring is
legible and horizontal.
The filler nec kisonlyl oc kedc orrectly when
th is is thec ase. #
Close theh ood. Driving and parking
131

Closing
theD EFfiller cap on loc kable filler
caps #
Afterf illing theD EFtank ,p lace DEF filler cap
1 onthef iller nec kand tigh tenitc lock wise. #
Remo vetool 4 from DEF filler cap 1and
st or eitint hevehicle tool kit. #
Pull co ver3on DEF filler cap 1upover
holes 2of DEF filler cap 1,turna nd
re lease. #
Turn DEF filler cap 1.
If DE Ffiller cap 1turns freel y,theD EFtank
is closed. Park
ing Pa
rking thev ehicle &
WARNING Risk offire caused byhot
ex haus tsystemp arts
Flammable material suc hasleaves, grass or
twigs ma yignit eift heyc ome int ocontact
wi th hotp arts of thee xhau stsystem or
ex haus tgas flow. #
Park thev ehicle so that no flammable
material can com eintoc ontact wi thhot
ve hicle components. #
In particular ,donotpar kond rygrass‐
land or har vested grain fields. &
WARNING Risk of accident and injury
du etoc hildren lef tunat tende dint he
ve hicle
If ch ildren ar eleftu nat tende dint hevehicle,
th ey could:
R opendoors,t hereb yendangering other
persons or road users.
R geto utofthev ehicle and be hit by
oncomin gtraffic.
R operat evehicle equipment and become
trapped, fore xamp le.
In addition ,children could also se tthe vehicle
in motion, fore xamp le,by:
R releasing thep arking brake.
R shifting thea utomatic transmission out of
par kposition 005D.
R startin gthe engine #
Neverlea ve children and animals unat‐
te nde dint hevehicle. #
When leaving thev ehicle, alw ayst ake
th eS martK eywit hyou and loc kthe
ve hicle. #
Keep theS martK eyout of ther eac hof
ch ildren. *
NO
TEDama getothev ehicle or thed rive‐
train due torolling away #
Alwaysp arky our vehicle safely and
according tolegal requirements. #
Alwaysp roper lysecur ethe vehicle
agains trolling away. &
WARNING Risk of accident and injur yif
pa rking brak eisnotapplied
If yo up arkt he vehicle wit hthe transmission
in par kposition 005Dand thep arking brak eis
no te ngaged, thev ehicle ma yroll away.
Engaging pa rkposition 005Dis no tafully ade‐
qu ater eplacement fort he parking brake.
Ther eisar isk of accident and injur y. #
Secu rethev ehicle agains trolling away
as desc ribed belo w. 13 2
Driving and pa rking

clogging
.Deposits ma yalsof ormont he fuel
injector .This ma yreduce thee ngine output.
Unburned fuel can getint ot he oil pan. This
causes thee ngine oil le veltor ise. This can
cause engin emechanical damage.
Obser vethef ollowing points to avoid damage
and reducing thee ngine output: #
Fill up wit hfuels wit hbio-diesel content
of 5% (ULSD) or less, whene verp ossi‐
ble. #
Regular lych ecky our engine oil le velif
yo uu se B2 0fuels on aregular basis. #
Strictl yfollo wthe oil chang einter vals
qu oted in thei nstrument clus tera nd
within your Main tenance Bookl et. #
Use only engine oils and filters
appr ovedfor use in your vehicle. #
Ifyo udon otplan todriv eyour vehicle
fo rs everal weeks, comple tely fill the
fuel tank in ad vance wi thULSD fuel. Fo
rm orei nformation, consult theg asstation
st aff. The identification of fuels wit hbio-diesel
con tent (ULSD or B20) mus tbec lear .Ift he iden‐
tification is no tclear ,don otrefuel .Don otrefuel
wit ha nyfuel sthat ha venotb eena pprove df or
yo ur vehicle.
Ta nk content and fuel reser ve
The total capacity of thef uel tank ma yvary,
depending on thev ehicle equipment.
Ta nk content and fuel reser ve Gasoline engine
Total capacity
M2 74 approx.22g al
(85 liters) Diesel engine
Total capacity
OM6 51/OM642 appr ox.2 4.5 gal
(93 liters) Gasoline engine Of whic
hreser ve
fuel
Model switha ppr ox.
19 gal(85 l)tot al
capacity appr
ox.5g al
(1 9l iters) Diesel engine Of whic
hreser ve
fuel
Model switha ppr ox.
20 gal(93 l)tot al
capacity appr
ox.5g al
(1 9l iters) DEF
Note
sonD EF
Obser vethen otes on operating fluids
(/ page240).
DEF is awater-soluble fluid fort he exhaus tgas
af te rtre atment of diese lengines.
* NO
TEDama gecaused byadditives in
DE Forbyd iluting DEF The DEFe
xhaustgasa ftertreatment sy stem
could be destr oyed bythef ollowing:
R Additives in DEF
R Dilutin gDEF #
Onlyuse DEFina ccordance wit hISO
222 41 . #
Do no tmix additives. #
Do no tdilut eD EF. *
NO
TEDama geand malfunctions caused
by impurities in DEF Impurities in DE
Fresult in thef ollowing:
R Higher emission values
R Damag etothe catalytic con verter
R Engine damage
R Malfunctions in theD EFexhaus tgas
af te rtre atment sy stem #
Avoid impurities in DEF. +
ENVIRONMENTAL
NOTESoiling wi th
DEF DEF
residue cr ystallizes af ters ome time and
st ain thea ffected sur faces. Te
ch nica ldata 243

#
Immedia tely rinse su rfaces that com ein
con tact wi thDEF when filling wit hwater
or remo veDEF wi thad am pcloth and
col dw ater.
If DEF has alread ycrystallized, clean using a
spon geand col dwater. If
yo uo pen theD EFtank ,small amounts of
ammoni avapor ma ybereleased. Do no tinhale
an ya mmonia vapor that ma ybereleased. Fill the
DEF tank only in well-ventilated areas.
DEF consum ption and filling capacity
DEF consum ption
Lik efuel consum ption, DE Fconsum ption is highly
dependent upon driving stylea nd operating con‐
ditions. DEFc onsumption is usuall ywithin a
ra ng eof0a nd10%oft he fuel consum ption. If
necessar y,DEF mu stbe refilled in acco rdance
wit hthe instructions when ther efill messag eis
displa yedint he instrument clus ter.This ma yalso
be necessar ybetwe en thes cheduled mainte‐
nance.
To tal capacity of DEF tank Ve
hicl eT otal capacity
All model s5 .8gal(22 liter s) Exhau
stgasa ftertreatment
The exhaus tgas af tertre atment sy stem mus tbe
operated in conjunction wit hDEFif it is tofunc‐
tion cor rectl y.
If yo uo perat ethe vehicle without DEF or with
emissions-rele vant malfunctions ,the legal MOT
appr oval is in validated. Youw illthen probably no
longer be permitted tooperat ethe vehicle on
public roads.
It ma ybei mproper or punishable in som ecoun‐
tries tooperat eavehicle that uses no DE Forone
th at does no tcompl ywitht he specifications of
th ese operating instructions.
Engine management monitor sthe exhaus tgas
af te rtre atment component sfor compliance with
emiss ions la wsand regulations. If youa ttem ptto
operat ethe vehicle without DEF ,withd iluted DEF
or wit hadiffe re nt reducing agent ,this will be
de tected bythee ngine management sy stem.
Other emissions- releva nt malfunctions ,e.g.
me tering malfunctions or sensor er rors,a re also
de tected and log ged. The engin
emanagement sy stem subsequently
pr eve nts thee ngine being restar teda fter issuing
aw arning message.
Therefor eadd DE Ftank regular lyduring vehicle
operation or ,atthe latest, af terr eceiving thef irst
wa rning messag eviathei nstrument clus ter. Engine oil
Note
sone ngine oil
Obser vethen otes on operating fluids
(/ page240). *
NO
TEEngine damag ecaused byan
incor rect oil filter ,incor rect oil or addi‐
tives #
Do no tuse engine oil soroilfilter sother
th an those whic hmeetthe specifica‐
tions necessar yfor thep rescribed
service inter vals. #
Do no talter thee ngine oil or oil filter in
order toachie velonger chang einter vals
th an presc ribed. #
Do no tuse additives. #
Have thee ngine oil changed af tert he
prescribed inter vals. Mercedes-Benz
recommends having theo il
ch anged at aqualified specialis tworks hop.
Fu rther information on engine oil and oil filter:
R intheMBS pecification sfor operating fluidsat
http://be vo.mercedes-benz.com (b yentering
th ed esignation)
R ataq ualified specialis tworks hop 244
Tech nica ldata