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 (/ page264). #
Slowl yturnc oolant 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
(/ page331). Main
tenance and care 269
R
vehicles with agasoline engine: onlyper‐
fo rm startin gassis tance when thee ngine and
ex haus tsystema recold #
Vehicles with abatter ymain switch: check
whe ther theb atter ymain switc hisswitched
on (/ page115). #
Secur ethe vehicle using thep arking brake. #
Vehicles with automatic transmission:
shif tthe transmission toposition 005D. #
Switc hoffthei gnition and all electrical con‐
sumers. #
Open theh ood (/ page264). Example: jump-s
tart connection point
% Right-hand-driv
evehicles: thej ump-s tart
connection points ma ybeonthe opposite
side. #
Remo vethec ove rfromt he positiv eterminal
on thed onor batter y. #
First,c onnec tthe positiv eterminal clam pof
th ej umper cables/charging cables tothe
positiv eterminal of theo ther vehicle's bat‐
te ry. #
With positiv eterminal clamp 2ofthe
jumper cable ,slide ther ed pr otectiv ecap on
jump-s tart connection point 1back witha
clockwis eturn. #
Connect thep ositiv eterminal clam ptothe
positiv eterminal of jump-s tart connection
point 1. #
During starting assistance: star tt he engine
of thed onor vehicle and le titrun at idle
speed. #
Connect then egativ eterminal of thed onor
batter ytothe ground point of your ow nv ehi‐ cle wit
hthe jumper cable/charging cable.
Begin wit hthe donor batter y. #
During starting assistance: star tt he engine
on your ow nv ehicle. #
When charging: star tt he chargin gprocess. #
During starting assistance: lett he engine
ru nf or afew minutes. #
During starting assistance: beforediscon‐
necting thej umper cable, switc honanelec‐
trical consumer on your ow nv ehicle, e.g. the
re ar wind owheater or lighting.
When thes tartin ga ssis tance/charging proces sis
comple te: #
First,r emo vethej umper cables/charging
cables from theg round point and negative
te rm inal of theo ther vehicle's batter y,then
from thep ositiv eterminal of jump-s tart con‐
nectio npoint 1and thep ositiv eterminal of
th eo ther vehicle's batter y.Eac htime ,begin
at thec ontacts on your ow nv ehicle.
The redp rotectiv ecap springs bac ktoits ini‐
tial position when positiv eterminal clamp 2
is disconnected from jump-s tartconnection
point 1.
Fu rther information can be obtained at aqualified
specialis tworks hop. Installing/removing
thef loor co vering (vehi‐
cles with rear wheel drive) &
WARNING Risk of accident du eto
object sinthe driver's foot we ll
Object sinthe driver's foot we ll ma yimp ede
pedal tr avel or bloc kadepressed pedal.
This jeopardizes theo perating and road
saf etyoft hevehicle. #
Stow all object sinthevehicle securely
so that they canno tget intot he driver's
fo ot we ll. #
Ensur efloor mats and carpets cannot
slip and pr ovide suf ficient room fort he
pedals. #
Do no tlay multiple floor mats or carpets
on topofo ne ano ther. Breakdown assis
tance 283
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
ATTENTION ASSIST Inop-
erative
00AD
ATTENTION ASSIST:
Take aBreak! *T
heATTENTION ASSIS Thas de tected fatigue or increasing inatten‐
tiveness on thed rive r's par t(/pag e152). #
If necessa ry,t ak eab reak. Engine
Displ
aymessages
Possible causes/consequences and 0050 0050Solutions
00D4
Fuel Level Low *T
he fuel suppliesh avereached ther eser veleve l. #
Refuel.
009E
Replace Air Filter *
Ve hicles with adiese lengine: The engine air filter is clogged and
mus tber eplaced. #
Visit aq ualified specialis tworks hop.
00AC *T
hefanm otorisd efective. #
Without ahigh engine load, continue tothen eares tqualified
specialis tworks hop. Ensur ethat thec oolant temp eratur edis‐
pla yremain sbelo w2 48 °F (120 °C).
003A Check Fuel Filter *T
hewatert hat has accumulate dinthewate rsepa rato rh as reached
th em aximum le vel. #
Drain thew ater separator (/ page271).
00B3 Engine Oil Level Cannot
Be Measured *T
he electrical connection totheo il le vels ensor has been inter rup‐
te dort he oil le vels ensor is defective.
The engin eoil le velh as fallen tothem inimum le vel. #
Visit aq ualified specialis tworks hop.
00B2
Engine Oil Pressure Stop
Switch Off Engine *D
ispla ymessag efor cer taine ngines only:
The engine oi lpressur eistoo lo w.
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil pressure #
Avoid driving wit hinsuf ficient engine oil pressure. #
Stop in asafel ocation immediately .Donotcontinue driving. #
Consult aqualified specialis tworks hop. 348
Displaymessa gesa nd warning and indicator lamps
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00B2
Check Engine Oil Level
(Add 1Liter) *D
ispla ymessag efor cer taine ngines only:
The engine oi llev el has fallen tothem inimum le vel.
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil #
Avoid long journe yswit hinsuf ficient engine oil. #
Che ckthee ngine oil le velatt he next fuel stop.
To pupe ngineoil (/ page267).
Obser vethen otes on engine oil (/ page329).
00B2 Engine Oil Reduce Oil
Level *D
ispla ymessag efor cer taine ngines only:
The engine oi llev el is tooh igh.
* NO
TEEngine damag ecaused bydriving wit hexcess engine
oil #
Avoid long journe yswit he xcess engine oil. #
Visit aq ualified specialis tworks hop immediately and ha vethe
engine oil suctioned off.
00B2
Engine Oil Level Low
StopV ehicle Turn
Engine Off *D
ispla ymessag efor cer taine ngines only:
The engine oi llev el is tool ow.
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil #
Avoid long journe yswit hinsuf ficient engine oil. #
Stop in asafel ocation immediately .Donotcontinue driving. #
Switc hoffthee ngine. #
Chec kthe engine oil le vel.
Ad de ngin eoil (/ page267).
Obser vethen otes on engine oil (/ page329).
00B2 Check Engine Oil At
Next Refueling *T
he engine oil le velh as fallen tothem inimum le vel.
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil #
Avoid long journe yswit hinsuf ficient engine oil. #
Che ckthee ngine oil le velatt he next fuel stop.
To pupe ngineoil (/ page267).
Obser vethen otes on engine oil (/ page329).
003D *T
he battery's charge leve list oo lo w. #
Stop in asafel ocation immediately .Donotcontinue driving! #
Letthe engine run. #
Do no tcontinue driving unti lthe displa ymessag egoes out. Displa
ymessages and warning and indicator lamps 349
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions #
Wait until thee ngine has cooled down. #
Ensur ethat thea ir supply tothee ngine radiator is no tobstruc‐
te d.
00AC Check Coolant Level See
Operator's Manual *T
he coolant le velist oo lo w. &
WARNING Risk of scalding from ho tcoolant
The engine cooling sy stem is pressurized, particularly when the
engine is warm.Ify ou open thec ap, youc oul dbes calded byhot
coolant spr aying out. #
Letthe engine cool down befor eopening thec ap. #
When opening thec ap, wear pr otectiv eglove sa nd saf ety
gl asses. #
Open thec ap slowl ytorelease pressure. *
NO
TEEngine damag eduetoinsuf ficient coolant #
Avoid long journe yswit hinsuf ficient coolant. #
Topupc oolant (/ page268).
Regeneration not possi-
ble *N
otall condition shave been me tfor rege neration of thed iesel par‐
ticulat efilter . #
Continue driving as normal until all condition shave been me tfor
re ge neration of thed iesel particulat efilter.
The load condition of thed iesel particulat efilter is over50%a nd
th em essag estilla ppear sonthe instrument clus ter. #
Visit aq ualified specialis tworks hop. DEF (Diesel Exhaus
tFluid) Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00E2
Refill Additive See Opera-
tor's Manual *
In addition, they ellow 00E2 DEFindicator lam plight supont he
instrument clus tera nd aw arning tone sounds.
The DEF supply ha sfallen belo wthe firs tw arning thre shold. #
Addatl east2.5gal(9. 5l)ofD EF (/pag e130).
The 00E2 DEF indica torlamp onl ydisappea rswhen thev ehicle
is stationar y,at thel ates tafter 20 seconds, as soon as you
switc hont he ignition or star tt he engine af tert opping up.
00E2
Refill Additive Starts
until Emerg. Op.: XXX
See Operator's Manual *I
na ddit ion, they ello wD EFindicator lam plight supa ndaw arning
to ne sounds.
The DEF supply ha sfallen belo wthe reser vemar k.
Af tert he messag eappear sfor thef irst time ,the remaining DEF sup‐
ply willl astfor appr oxima tely 12 00 mile s(19 00 km) .The engine can
th en onl ybestarted ano ther 16 times. The numbe rofremaining
engine starts XX(16to1)iss hown inthem essag eevery time the
engine is star ted. Displa
ymessages and warning and indicator lamps 351
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions #
Addatl east2.5gal(9. 5l)ofD EF (/pag e130). The 00E2DEF
indica torlamp onl ydisappea rswhen thev ehicle is stationar y,at
th el ates tafter 20 seconds, as soon as yous wit ch on thei gni‐
tion or star tt he engine af tert opping up.
00E2
Refill Additive Emer-
gency Op.: XXX mph See
Operator's Manual *
In addition, they ello wD EFindicator lamp 00E2lightsupont he
instrument clus tera nd aw arning tone sounds.
If the Refill Additiv eEmergency Op.: XXX mph See Operator's Man-
ual displa ymessag eisshown, youc an only driv ethe vehicle at a
maximum speed of 5mph (8 km/h). #
Addatl east2.5gal(9. 5l)ofD EF (/pag e130).
The DEF indica torlamp 00E2 only disappea rswhen thev ehicle
is stationar y,at thel ates tafter 20 seconds, as soon as you
switc hont he ignition or star tt he engine af terr efilling.
0099
Additive System Fault
See Operator's Manual *
In addition, they ellow 00B9CheckEngine warning lam ponthe
instrument clus terl ights up and awarning tone sounds.
The DEF reducing agent is con taminated, diluted or is no tcompliant
wit hISO 222 41 . #
Have theD EFsuppl ytank cleaned an drefilled at aqualified spe‐
cialis tworks hop as soon as possible.
0099 Additive System Fault
Starts until Emerg. Op.:
XXX See Operator's Man-
ual *
In addition, they ellow 00B9CheckEngine warning lam ponthe
instrument clus terl ights up and awarning tone sounds.
The DEF reducing agent is con taminated, diluted or is no tcompliant
wit hISO 222 41 .
The exhaus tgas af tertre atment sy stem is defectiv eoranemissions-
re leva nt malfunction ha soccu rred. This malfunction or defect can
damag ethe exhaus tgas af tertre atment sy stem.
Af tert he messag eappear sfor thef irst time ,the engine can onl ybe
st ar teda nother 10 times. The numbe rofremaining engine starts XX
(1 0to1)iss hown inthem essag eevery time thee ngine is star ted. #
Visit aq ualified specialis tworks hop immediately.
0099 Additive System Fault
EmergencyO p.: XXX
mph See Operator's
Manual *
In addition, they ellow 00B9CheckEngine warning lam ponthe
instrument clus terl ights up and awarning tone sounds.
Yo uc an only driv ethe vehicle at amaximum speed of 5mph
(8 km/h). #
Visit aq ualified specialis tworks hop immediately. Ti
res Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
Tire Pressure Monitor
Inoperative No Wheel
Sensors *T
he ins talled wheels do no thave suitable tir epressur esensors. The
tir ep ressur emonitor has been switched off. #
Install wheels wit hsuitable tir epressur esensors. 352
Displa ymessages and warning and indicator lamps
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00AF
Obtain aNew Key *T
hekeym ustber eplaced. #
Visit aq ualified specialis tworks hop. Ve
hicle Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00B2
Check Washer Fluid *W
asher fluid le velinw asherreser voir has fallen belo wthe minimum. #
Topupw asherfluid (/ page270). *A
tlea st one door is open. #
Close al lthe doors. *T
he hood is open. &
WARNING Risk of accident if thee ngine hood is unlatched
while driving
An unloc kede ngin ehood ma yopen up when thev ehicle is in
motion and bloc kyour vie w. #
Neveru nlatc hthe engine hood while driving. #
Befor eevery trip, ensur ethat thee ngine hood is latched. #
Stop in asafel ocation immediately. #
Close theh ood.
003B
Inoperative See Opera-
tor’s Manual *S
tationar yheating is temp orarily malfunctioning. #
When thev ehicle is at astandstill in ahorizontal position and
th ee ngine has cooled down: tr ytoswitchont hestationary
heating four times, leavin gagap of se veralm inutes between
eac hattem pt. #
Ifth es tationar yheating does no tswit ch on: visit aqualified spe‐
cialis tworks hop.
003B Inoperative Refuel Vehi-
cle *T
her eist oo little fuel in thef uel tank.The stationar yheating cannot
be swit ched on. #
Refuel thev ehicle.
003B
Inoperative Battery Low *T
he on-boar dvoltag eistoo lo w.
The stationar yheating has swit ched off. #
Driv eane xtende ddista nc eu ntil theb atter yhas been suf fi‐
ciently charge da gain. Displa
ymessages and warning and indicator lamps 355
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
Switc hOff Lights
0049 Auto Lamp Function
Inoperative *T
he light sensor is malfunctioning. #
Visit aq ualified specialis tworks hop.
0049
Malfunction See Opera-
tor’s Manual *T
heexterior lighting is malfunctioning. #
Visit aq ualified specialis tworks hop.
Ve hicles with traile rhitch:af use mayhaveb lown. #
Stop in accordance wit hthe tra ffic conditions. #
Chec kthe fuses, and replace them if necessary(/ page290).
0049
Check Left Low
Beam (exa mp le) *T
he bulb in question is faulty. #
Visit aq ualified specialis tworks hop.
or #
Chec kwhether changing theb ulb is permitted. Indicator and
warning lamps Overvie
wofwarningand indicator lamps When
thei gnition is switched on, man ysystems
per form aself-test. Som ewarning and indicator
lamps ma yswitc honorf lashtemp oraril yduring
th is time. This behavior is no cause fora larm.
These warning and indicator lamps onl ysignal a
malfunction if they light up or flash, onc ethe
engine has been star tedort hevehicle is in oper‐
ation.
Wa rning and indicator lamps:
0058 Lo
wb eam (/ page80)
0060 Pa
rking light (/ page80)
0057 High beam (/
page81)
003E003D Tu
rn signal (/ page81)
005E Re
ar fogl ight (/ page80)
00E9 Saf
etyb elt no tfas tened
(/ page365)
0027 and
004D USA: Brakes (red) (/
page360)
004D Canada: Brakes (red) (/
page360)
004D Brakes (yellow) (/
page360)
0025 ABS malfunctioning (/
page360)
002E Off-road
gear 00E5
ESP®
(/ page360)
00BB ESP®
OFF (/ page360)
00D4 Ac
tiveB rake Assi stdeactivated
(/ page140)
0049
and 0024 USA: Electric parking brak
eapplied
(red) (/ page360)(/pag e360)
0024 Canada: Electric parkin
gbrake
applied (red) (/ page360)
(/ page360)
0024 Electric parkin
gbrake (yellow)
(/ page360) (/ page360)
00CC Po
we r-assis teds teering malfunc‐
tionin g(/ pag e365)
003D Elect
rical malfunction
(/ page 366)
0075 Re
stra int sy stem (/ page360)
00B9 Chec
kEngine (/ page366)
00D4 Fu
elreser vewit hfuel filler flap loca‐
tio nindicator (/ page366)
00AC Coolan
ttoo hot/cold (/ page366)
00BA Dis
tance warning (/ page365)
0028 Preglow
0077 Ti
re pressur emonitor Displa
ymessages and warning and indicator lamps 359