Page 305 of 348

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. #
Avoiding high engine loads, continue tothen eares tqualified
specialis tworks hop. Ensur ethat thec oolant temp eratur edis‐
pla yremain sbelo w2 48°F (120°C).
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 (/ page218).
Regeneratio nNot 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% and the
messag estilla ppear sonthe instrument clus ter. #
Consult aqualified 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 e137).
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. Displa
ymessages and warning and indicator lamps 303
Page 306 of 348

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
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. #
Addatl east2.5gal(9. 5l)ofD EF (/pag e137).The 00E2 DEF
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 e137).
Th eD EF 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. 304
Displa ymessages and warning and indicator lamps
Page 307 of 348

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.
0077
Tire Press .Sen.M issing *T
he tir epressur esensor signal is missing from one or mor etires.
No pressur evalue is displa yedf or thet ireinq uestion. #
Have thef aulty tir epressur esensor replaced at aqualified spe‐
cialis tworks hop.
Tire Press. Monitor Cur-
rently Unavailable *T
her eisi nterfere nce from apowe rful source of radio wav es As a
re sult, no signals from thet irep ressur esensor sare re ceived. The
tir ep ressur emonitor is temp orarily una vailable. #
Continue driving.
As soon as thec ause has been eliminated, thet irep ressure
monitor automaticall yswitches on.
0077 Warning Tire Malfunction *T
he pressur einone or mor etires suddenl yfalls. The wheel position
is shown. &
WARNING Risk of an accident from driving wi thaflat tire
Flat tires ar edangerous in thef ollowing ways:
R The tires can overheat and cause afire.
R The driving characteristics, as well as steering and braking,
ma ybeg reatl yimp aired.
Yo uc oul dthen lose contro lofthevehicle. #
Do no tdrive wit haf lat tire. #
Obser vethen otes on flat tires. In
fo rm atio nabout flat tires (/ page230). #
Stop thev ehicle in accordance wit hthe tra ffic conditions. #
Chec kthe tires.
0077 Check Tires *T
he pressur einone or mor etires has fallen significantl y.The wheel
position is shown. &
WARNING Risk of an accident du etoinsufficient tir epres‐
sure
Ti re pressures that ar etoo lo wpose thef ollowing hazards:
R The tires ma yburst,e speciall yasthe load and vehicle speed
increase.
R The tires ma ywear excessivel yand/or une venly ,w hich may
greatly impair tir etraction.
R The driving characteristics, as well as steering and braking,
ma ybeg reatl yimp aired.
Yo uc oul dthen lose contro lofthevehicle. #
Obser vether ecommended tir epressure. Displa
ymessages and warning and indicator lamps 305
Page 308 of 348

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions #
Adjus tthe tir epressur eifn ecessar y. #
Stop in accordance wit hthe tra ffic conditions. #
Chec kthe tir epressur e(/pag e246) and thet ires.
0077
Please Correct Tire Pres-
sure *T
he pressur einatleastone tir eistoo lo wort he pressures of the
individual tires deviat etoo muc hfrome acho ther. #
Chec kthe tir epressure, and add air if necessar y. #
When thet irep ressur ehas been se tcorrectl y,re-sta rt thet ire
pressur emonitor (/ page252).
Tire Pressure Monitor
Inoperative *T
he tir epressur emonitor is malfunctioning. #
Visit aq ualified specialis tworks hop. Key
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00AF
Don't Forget Your Key *T
his messag eremind syou no ttoleave your SmartK eyinthev ehi‐
cle. #
Take theS martK eywit hyou when youg etout of thev ehicle.
00AF
Place the Key in the
Marked Space See Oper-
ator's Manual *S
martK eydetection is malfunctioning. #
Chang ethe SmartK ey's position in thev ehicle. #
Startt he vehicle wit hthe SmartK eyinthem arke ds pace
(/ page110).
00AF Ke yN ot Detected (red
displ aymessage) *T
he SmartK eyis no tdetected and ma ynolonger be in thev ehicle.
The SmartK eyis no longer in thev ehicle and yous wit ch thee ngine
off:
R Youc an no lon gers tart thee ngine.
R Youc anno tloc kt he vehicle centra lly. #
Ensu rethat theS martK eyis in thev ehicle.
If th eS martK eydetection function has amalfunction du etoa
stro ngradio signal source, proceed as follo ws: #
Stop thev ehicle immediately in accordance wit hthe traf ficc on‐
ditions. #
Place theS martK eyinthem arke ds pace fors tartin gw itht he
Sma rtKe y(/pag e110).
00AF Key Not Detected (white
displa ymessa ge) *T
he SmartK eyis cur rently no tdetected. #
Chang ethe SmartK ey's position in thev ehicle. #
Ifth eS martK eyisstill no tdetected, star tt he engine wit hthe
Sma rtKe yint he mar keds pace (/ page110). 306
Displaymessa gesa nd warning and indicator lamps
Page 309 of 348

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00AF
Replace Key Battery *T
he SmartK ey's batter yisdischarged. #
Changing theb atter y(/ pag e47).
00AF Obtain aNew Key *T
he SmartK eymus tber eplaced. #
Visit aq ualified specialis tworks hop. Ve
hicle Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00B2
Check Washer Fluid *T
hewasher fluid le velint hewasher fluid reser voir has fallen below
th em inimum. #
Adding washer fluid (/ page220).
003E *A
tlea st one door is open. #
Close al lthe doors.
f *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 thev ehicle immediately in accordance wit hthe traf ficc on‐
ditions. #
Close theh ood.
003B
Inoperative See Opera-
tor’s Manual *T
hestationar yheater is temp orarily malfunctioning. #
When thev ehicle is at astandstill in ahorizontal position and
th ee ngine has cooled down: tr ytoswitchont hestationary
heater four times, leavin gagap of se veralm inutes between
eac hattem pt. #
Ifth es tationar yheater does no tswit ch on: consult aqualified
specialis tworks hop.
003B
Inoperative Refuel Vehi-
cle *T
her eist oo little fuel in thef uel tank.The stationar yheater cannot
be swit ched on. #
Refuel thev ehicle. Displa
ymessages and warning and indicator lamps 307
Page 310 of 348

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
003B
Inoperative Battery Low *T
he on-boar delectrical sy stem voltag eist oo lo w.
The stationar yheater has swit ched off. #
Driv eane xtende ddista nc eu ntil theb atter yhas been suf fi‐
ciently charge da gain.
00CC
Steering Malfunction
Increased Physical Effort
See Operator's Manual *T
hesteering po werassi stanc eism alfunctioning. &
WARNING Risk of an accident du etoaltered steering char‐
acteristics
If th ep owe rassi stanc eoft hesteering fails partiall yorcom‐
ple tely,y ou will need touse mor eforce tosteer. #
If saf esteering is possible, driv eoncarefully. #
Visit or consult aqualified specialis tworks hop immedi‐
atel y. #
If saf esteering is possible, driv eoncarefully. #
Visit or consult aqualified specialis tworks hop immediately.
00CC
Steering Malfunction
Stop Immediately See
Operator's Manual *T
hesteering is malfunctioning. Steerability is heavily impaired. &
WARNING Risk of accident if steering capability is impaired
If th es teering does no tfunction as intended, thev ehicle's oper‐
ating saf etyisj eopardized. #
Pull overand stop thev ehicle safely as soon as possible,
paying attention toroad and traf ficc onditions. Do no tcon‐
tinue driving under an ycircums tances. #
Consult aqualified specialis tworks hop. #
Stop thev ehicle immediately in accordance wit hthe traf ficc on‐
ditions. Do no tcontinu edriving. #
Consul taqualified specialis tworks hop.
Shift to 'P' or 'N' to Start
Engine *
Yo uh ave attem pted tostar tt he engine in transmission position 005B
or 005E. #
Shif tthe transmission toposition 005Dor005C.
To Engage Transmiss.
Position RFirst Depress
the Brake *
Yo uh ave attem pted toshif tfromp osition 005Bor005C toposition 005E. #
Depress theb rake pedal. #
Shif tthe transmission toposition 005E.
Air Conditioning Malfunc-
tion See Operator's Man-
ual *T
he function of thec limat econt rols ystemist emporarily restricted.
The quantity of air and flow of fresh air ar econt rolled automaticall y. #
Have thec limat econt rols ystemc heckedataq ualified specialist
wo rkshop.
Auxiliary Battery Mal-
function *T
he auxiliary batteryfor thet ransmission is no longer being
ch arge d. #
Visit aq ualified specialis tworks hop. #
Until then, alw ayss hiftthe transmission toposition 005Dmanually
befor eyou switc hoffthee ngine. 308
Displa ymessages and warning and indicator lamps
Page 311 of 348

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions #
Befor eleaving thev ehicle, apply thep arking brake.
Reversing Not Possible
Servic eRequired *T
he transmission is malfunctioning. It is no longer possible toselect
re ve rseg ear. #
Visit aq ualified specialis tworks hop.
Transmission Malfunc-
tion Stop *T
he transmission is malfunctioning. The transmission automatically
shifts toposition 005C. #
Stop thev ehicle immediately in accordance wit hthe traf ficc on‐
ditions. #
Shif tthe transmission toposition 005D. #
Consult aqualified specialis tworks hop.
0072
Vehicle Operational
Switch the Ignition Off
Before Exiting *Y
ou ar eabout toexitth ev ehicle when it is in aready-to-driv estate. #
When youe xit thev ehicle, switc hoffthei gnition and take the
ke yw ithy ou. #
Ifyo udon otexitth ev ehicle, switc hoffthee lectrical consum‐
ers, e.g. thes eat heating. Otherwise, the1 2‑V batter ymaydis‐
ch arge and it will be possible tostar tt he vehicle onl ywitht he
aid of asecond batter y(starting assista nce).
Service Require dDoNot
Shift Gears Visit Dealer *T
he transmission is malfunctioning. The transmission position can
no longer be changed. #
Ifth et ransmission is in position 005B,visitaqualified specialist
wo rkshop, without changing thet ransmission position. #
Fora llot her transmission positions, par kthe vehicle in asafe
location. #
Infor maq ualified specialis tworks hop or breakdown service.
Only Shift to 'P' when
Vehicle is Stationary *
The transmission can onl ybeshiftedtop osition 005Difth ev ehicle is
at as tandstill.
NP ermanently Active
Risk of Rollin gAway *W
hile thev ehicle is rolling or driving ,the transmission wasshifted
to position 005C. #
Tostop, depress theb rake pedal and, when thev ehicle is at a
st andstill ,shif tthe transmission toposition 005D. #
Tocontinu eyour journe y,shif tthe transmission toposition 005B
or 005E.
Driver's Door Open &
Transmission Not in P
Risk of Vehicle Rolling
Away *T
he driver's door is no tfull yc losed and thet ransmission is in posi‐
tion 005E,005Cor005B. #
When parking thev ehicle, shif tthe transmission toposition 005D.
Apply Brak etoShift
from 'P' *Y
ou ha veattem pted toshif ttoa differe nt transmissio nposition from
position 005D. #
Depress theb rake pedal. Displa
ymessages and warning and indicator lamps 309
Page 312 of 348

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
x
Vehicle Tracker has
been activated. Details:
see manual or associ-
ated mobile app. or
Vehicle locating activa-
ted –see manual or
mobile app. *T
hevehicle features activated services from Mercedes PRO.
Locatin gthe vehicle ma ybepossible within thef rame workof
Mercedes PR Oconnect. #
Chec kthe status of thea ctivated services at http://
mercedes.pro. #
Ask thev ehicle owner fort he de tails.
g
Step Not Extended See
Operator's Manual or
Step Not Extended Mal-
function *T
he electrical step is not, or is onl ypartially ,extended. #
Ensu rether eiss ufficient clea rance fort he electrical step. #
Open or close thes liding door again. #
Ifth ee lectrical step does no tcomple tely ex tend again, push it in
manually (emergency release) (/ page58). #
Infor mpassen gers that thes tepism issing befor etheye xit the
ve hicle.
g
Step Not Retracted See
Operator's Manualor
Step Not Retracted Mal-
function *T
he electrical step is not, or is onl ypartially ,retra cted. #
Ensu rether eiss ufficient clea rance fort he electrical step. #
Open or close thes liding door again. #
Ifth ee lectrical step does no tcomple tely retract again, push it in
manually (emergency release) (/ page58). Lights
Displa
ymessa ges
Possible causes/consequences and 0050 0050Solutions
Adaptive Highbeam
Assist Camera View
Restricted See Opera-
tor's Manual *
The camer aviewisr educed. Possible causes:
R Dirtont he windshield in thec amera's field of vision
R Heavy precipitation or fog
Driving sy stems and driving saf etys ystems ma ybem alfunctioning
or temp orarily una vailable.
When thec auses ha vebeen eliminated, thed riving sy stems and
driving saf etys ystems ar eavailable again.
If th ed ispla ymessag edoes no tgoout: #
Stop in asafel ocation. #
Clean thew indshield.
Adaptive Highbeam
Assist Currently Unavail-
able See Operator's Man-
ual *A
daptiv eHighbeam Assis tistemporarily una vailable.
The sy stem limits ha vebeen reached (/ page86). #
Continue driving.
When thec auses ha vebeen eliminated, thes ystemw ill be avail‐
able again. The displa ymessage AdaptiveHighbeam Assist Now
Available appears. 310
Displaymessa gesa nd warning and indicator lamps