check engine MERCEDES-BENZ METRIS 2021 MY21 Operator's Manual

Engine oil
Checking
thee ngine oil le velw itht he on-
boa rdcompu ter( ve hicl ewithout steering-
wheel but tons)
Re quirements:
R The vehicle is equipped wit hanoil levels en‐
sor (vehicles wit hrear-wheel drive).
R The vehicle is le veld uring them easuring
process.
R The engine is switched of fatnormal operat‐
ing temp erature.
R Awaitin gperiod of five minutes is obser ved.
R The ignition is switched on.
If no oil le velisd isplayeda fter five minutes at
ex tremely lo wtemperatures, repeat thee ngine oil
measurement af tera nother five minutes.
If an oil le velreading is still no tdispla yed, check
th eo il le velw itht he oil dipstic k(/ pag e179).
Ha ve thee ngine oil le velc hec kedataq ualified
specialis tworks hop.
Use theb uttons on thei nstrument clus ter. #
Press theÈ button toselect Oil Level. #
Press the0078button toconfirm.
While thee ngine oil le velm easuremen tisin
progress, thed ispla yshows the Measuring
Engine Oil Level... message.
The following messa gesm ayappear af tert he
engine oi lleve lmeasurement:
Engine Oil Level OK #
Do no trefill oil.
Add 1,0 liq.gal. Engine Oil #
Addthe specified quantity of oil
(/ page179). #
Repeat thee ngine oil measurement af tera
fe wm inutes.
Engine Oil Level: Reduce Oil Level #
Siphon of fany exc ess engine oil that has
been added. Todo so, consult aqualified spe‐
cialis tworks hop.
For Eng. Oil Level: Ignition Must Be On #
Switc hont he ignition.
Wait to Check Engine Oil Level #
Ifth ee ngine is at normal operating temp era‐
ture, repeat thee ngine oil measurement af ter
appr oximately five minutes. #
Ifth ee ngine is no tatnormal operating tem‐
perature, repeat thee ngine oil measurement
af te ra pproxima tely 30 minutes.
Engine Oil Level with Engine Off #
Switc hoffthee ngine and, when it is at nor‐
mal operating temp erature, wait appr ox‐
imatel yfivem inutes befor emeasu ring the
engine oil le vel.
Chec kthe engine oil le velw itht he on-board
comp uter (vehicle with steering-wheel but‐
to ns)
Re quirements:
R The engin eoil le velisd etermined during driv‐
ing.
R The engine is at normal operating temp era‐
ture.
R The vehicle is le veld uring them easuring
process.
R The hood is no topen.
Dependin gonthe driving profile, theo il le velc an
be displa yedo nlya fter ad riving time of up to
30 minutes and onl ywhen thei gnition is
switched on.
On-boar dcomputer:
4 Service 5
Engine Oil Level
One of thef ollowing messa gesa ppear son
th ed ispla yoft he on-boar dcompu ter:
Engin eOil Level Measuremen tinProgress... #
Measurement of theo il le veln ot ye tpossible.
Re peat theq uer yafter drivin gfor am aximum
of 30 minutes.
Engine Oil Level OK
The bar ford isplaying theo il le velont he display
is green and is between "min" and "max". #
Do no trefill oil. The engine oil le velisc orrect.
Engine Oil Leve lWarmUpE ngine #
Warm upthee ngine tooperating temp era‐
ture.
Engine Oil Level Correct Measurement Only if
Vehicle Is on Level Ground #
Park thev ehicle on alevel sur face. 17 8
Maintenance and care

Engine Oi
lLevel Add 1.0 l
The ba rfor displaying theo il le velont he display
is orang eand is belo w"min".
The oil le velist oo lo w. #
Add1 .1US qt (1 l) of engine oil
(/ page179).
Reduce Engine Oil Level
The bar ford isplaying theo il le velont he display
is orang eand is abo ve"max".
The oil le velist oo high. #
Siphon of fany exc ess engine oil that has
been added. Todo so, consult aqualified spe‐
cialis tworks hop.
For Engine Oil Level Ignition Must Be On #
Switc hthe ignition on tocheckt he engine oil
le ve l.
Engine Oil Level System Inoperative
The fill le vels ensor is defectiv eornotplugged in. #
Have theo il le veld ispla ychec kedataq uali‐
fi ed specialis tworks hop.
Engine Oil Level System Currently Unavail. #
Close theh ood.
% Ve
hicles wit hcold oil le veld isplay: af tert he
ve hicle has been out of use forane xtended
time ,the oil le velw ill automaticall ybeshown
on thed ispla y.If it is no tpossible tomeasu re
th ee ngine oil le vel,am essag etothat ef fect
will appea r.
Checking thee ngine oil le velw ithad ipst ick &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponent pa rtsint he engine com‐
partment can be very hot, e.g. thee ngine, the
cooler and pa rtsoft heexhaus tsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. The engin
eoil becomes dirty during operation,
loses quality and also graduall yloses volume.
Chec kthe oil le velregularly and add oil or ha veit
ch anged if necessar y.
Re gular lych eckt he fluid le vela nd them ajor
assemblies forl ea ks.Ify ou de tect fluid loss ,for
ex ample, oil drops on thev ehicle parking space, consult
aqualified specialis tworks hop as quickly
as possible. #
Onlychec kthe oil le velw hen thee ngine is at
normal operating temp erature. Oil dipstic
kand engine oil filler openin g(example:
ga soline engine) #
Pull oil dipstick 1out of thed ipstic ktube. #
Wipe theo il dipstick 1using alint-free
clo th. #
Inser tthe oil dipstick 1bac kintot he guide
tube as farasitw illgoa nd pullito ut again.
If th el eve lisb etwe en MIN mark 3and MAX
mark 2,the oil le velisa dequate. #
Ifth eo il le velh as dropped toor belo wmini‐
mum mark 3,open cap 4and add engine
oil (/ page179).
The di fference in quantity between mar ks2 and
3 is appr oximatel y1.6 US qt (1.5 liters) in the
case of gasoline engines.
Ad ding engin eoil &
WARNING Risk offire and injur yfrom
engine oil
If engine oil comes int ocontact wit hhotcom‐
ponent parts in thee ngine compartment, it
ma yignite. #
Mak esuret hat no engine oil is spilled
next tothef iller opening. #
Allowthe engine tocool of fand thor‐
oughly clean thee ngine oil from compo‐
nent parts befor estartin gt he vehicle. Maintenance and care
17 9

&
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponent pa rtsint he engine com‐
partment can be very hot, e.g. thee ngine, the
cooler and pa rtsoft heexhaus tsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. *
NO
TEDama gecaused byrefilling too
muc hengine oil To
om uche ngine oil can damag ethe engine
or thec atalytic con verter. #
Have excess engine oil remo vedata
qu alified specialis tworks hop. *
NO
TEEngine damag eduetouse of addi‐
tives in thee ngine oil The use of additional additives in
thee ngine
oil can damag ethe engine. #
Do no tuse an yadditional additives in
th ee ngine oil. +
ENVIRONMEN
TALN OTE Environmental
damag ecaused byspilling oil when refill‐
ing Damag
eiscaused tothee nvironmen tifspil‐
led oil enter sthe soil. #
When refilling oil, mak esuren oneis
spilled. Example: engin
eoilfiller opening #
Obser vethei nformation rega rding appr oved
engine oil under "Operating fluids and capaci‐
ties" (/ page228). #
Unscr ewand remo vecap 1. #
Refill engin eoil. #
Place cap 1onthef iller openin gand
tigh ten.
Whe ndoing so, mak esuret hat thec ap
engages cor rectly. #
If present, checkt he oil le velu sing theo il dip‐
st ick( / pag e179). #
Inthec ase of vehicles without an oil dipstic k,
ch eckt he oil le velw itht he on-boar dcom‐
puter af tert he next journe y(/ pag e178).
It is necessa ryto runt he engine forane xtended
perio dafter eac hoilre fill to cor rectly de tect the
oil le vel. Fill le velc hanges during oil refills may
no tbei mmediately visible. Depending on the
driving profile, then ew oil le velc an onl ybedis‐
pla yeda fter ad riving time of up to60 minutes.
If necessa ry,o nlyr efill theq uantity of oil shown
in thei nstrument clus terd ispla yand checkt he
oil le vela ga in af tert he next journe y. Checking/adding coolant
&
WARNING ‑Riskoff irea nd injur yfrom
antifreeze
If antifreez ecomes int ocontact wi thhotc om‐
ponent parts in thee ngine compartment, it
ma yignite. #
Allowthe engine tocool down before
adding antif reeze. #
Mak esuret hat no antifreeze spills out
next tothef iller opening. #
Thoroughl yclean of fany antifreeze from
componen tparts befor estartin gt he
ve hicle. &
WARNING Risk of scalding from hot
coolant
If yo uo pen thec ap, youc oul dbes calded. #
Letthe mo torc ool down befor eopening
th ec ap. #
When opening thec ap, wear pr otective
gl ove sand saf etyg lasses. #
Open thec ap slowl ytorelease pres‐
sure. 18 0
Maintenance and care

Only
checkt he coolant le vela nd/or fill th ec ool‐
ant if thev ehicle is stationar y,on aleve lsurface
and thee ngine has cooled down. The coolant
te mp eratur emustbeb elow1 22°F (50°C). &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponent pa rtsint he engine com‐
partment can be very hot, e.g. thee ngine, the
cooler and pa rtsoft heexhaus tsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. #
Coolant con tains glyc ol and is therefor epoi‐
sonous. Obser vethei nformation under
"Operating fluids and capacities"
(/ page230).
* NO
TEPaint wo rkdamag eduetocoolant If coolant
getsonp ainted sur faces, thep aint‐
wo rkcan be damaged. #
Addc oolant carefully. #
Remo vespilledc oolant. Re
gular lych eckt he engine cooling sy stem and
th eh eating sy stem forl ea ks.Ift hereisal oss of
coolant ,have thec ause de term ined and rectified
in aq ualified specialis tworks hop without dela y. Example: cap and coolant
expansion reser voir
Checking thec oolant le vel #
Slowly tur ncap 1 of coolant expansion res‐
er vo ir2 half aturnc oun ter-clockwise and
allo woverpressur etoe scape. #
Turn cap 1further and remo veit. The coolan
tleve lisc orrect in thef ollowing cases:
R Uptomar kerb ar3 when thee ngine is cold
R Ifth ee ngine is warm,upto0 .6 in (1.5 cm)
ove rmarke rb ar3
Ad ding coolant
Only use coolant appr ovedfor Mercedes-Benz to
av oid damaging thee ngine cooling sy stem. #
Refe rtot he information on coolant
(/ page230). #
Refill th ec oolant up tomar kerb ar3 inthe
fi ller openin gofcoolantexpansio nreser voir
2. #
Replace cap 1and tighten in aclockwise
direction. #
Startt he engine. #
Setthe temp eratur einthevehicle interior to
th em aximum output on thec ont rolp anel of
th ec limat econt rol. #
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. Re
filling thew indshield washer sy stem &
WARNING Risk offire and injur yfrom
windshiel dwashe rconcentrate
Wi ndshield washer concentrat eishighlyflam‐
mable. #
Avoid fire ,o pen flames ,smokin gand
th ec reation of spar kswhen using wind‐
shield washer concentrate. &
WARNING Risk of bu rnsf romh otcom‐
ponent parts in thee ngine compartment
Cer tainc omponent pa rtsint he engine com‐
partment can be very hot, e.g. thee ngine, the
cooler and pa rtsoft heexhaus tsystem. #
Allowthe engine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. *
NO
TEDama getothee xterio rlighting
due tounsuitable windshield washer fluid Uns
uitable windshield washer fluid ma ydam‐
ag et he plastic sur face of thee xterio rlighting. #
Onlyuse windshield washer fluids that
ar ea lso suitable foru se on plast ic sur‐ Maintenance and care
181

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
If th ese conditions ar enotmet, thea utomatic co-driver's airbag
actuation is malfunctioning. #
Installth ec hild restra int sy stem on asuitable rear seat.
or #
Seat aperson of smaller statur eonas uitablerear seat. #
Consult aqualified specialis tworks hop immediatel y.
Fu rther information on airbag shutof fcan be found unde r"Occupant
classification sy stem (OCS)" (/ page30).
0026 (equipment-dependent)
Check Brake Pad Wear *T
he brakepads ha vereached their wear limit. #
Consult aqualified specialis tworks hop.
0027
(US Aonly)
004D (Canadao nly)
Check Brake Fluid Level *T
her eisi nsufficient brak efluid in theb rake fluid reser voir. &
WARNING Risk of an accident du etolowbrak efluid le vel
If th eb rake fluid le velist oo lo w,theb raking ef fect and theb rak‐
ing characteristic smaybe impaired. #
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. #
Do no tadd brak efluid. 0091
EBD, ABS, ES PInopera-
tive *E
BD is una vailable due toam alfunction. This mean sthat ABS, BAS,
hil lstart assis tand ESP ®
as well as its driving saf etys ystems, for
ex ample, ar ealso una vailable.
AT TENTION ASSIS Tisdeactivated and other driving sy stems could
be automaticall ydeactivated.
The brak esystemc ontinues tofunction normally ,but without the
functions lis teda bove. &
WARNING Risk of skidding if EBD, ABS and ESP ®
arem al‐
functioning
The wheels ma yblock during braking and ESP ®
does no tper‐
fo rm anyv ehicle stabilization.
The steerability and braking characteristic sareheavil yimp aired
and theb raking dis tance ma yincrease. In addition, other driving
saf etys ystems ar eswitched off. #
Driv eonc arefull y. #
Have theb rake system checkedi mmediately at aqualified
specialis tworks hop. #
Switc hthe engine off, wait brief lyand star tt he engine again. Displa
ymessages and warning and indicator lamps 243

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions #
Chec kwhether thed ispla ymessag ehas disappeared and ESP ®
is operational.
If th ed ispla ymessag econtinues tobe shown: #
Driv eonc arefull y. #
Consult aqualified specialis tworks hop immediatel y.
007A
00DF
00E5 Inoperative See Opera-
tor's Manual *E
BD is una vailable due toam alfunction. This mean sthat ABS, BAS,
hil lstart assis tand ESP ®
as well as its driving saf etys ystems, for
ex ample, ar ealso una vailable.
AT TENTION ASSIS Tisdeactivated and other driving sy stems could
be automaticall ydeactivated.
The brak esystemc ontinues tofunction normally ,but without the
functions lis teda bove. &
WARNING Risk of skidding if EBD, ABS and ESP ®
arem al‐
functioning
The wheels ma yblock during braking and ESP ®
does no tper‐
fo rm anyv ehicle stabilization.
The steerability and braking characteristic sareheavil yimp aired
and theb raking dis tance ma yincrease. In addition, other driving
saf etys ystems ar eswitched off. #
Driv eonc arefull y. #
Have theb rake system checkedi mmediately at aqualified
specialis tworks hop. 00E5
0091
Inoperative *
ESP ®
,B AS and hil lstart assis tare una vailable due toam alfunction.
AT TENTION ASSIS Tisdeactivated and other driving sy stems could
be automaticall ydeactivated.
The brak esystem continues tofunction normally ,but without the
functions lis teda bove.T he wheel scould therefor eloc kupatan
early stag eify ou brak ehard, fore xamp le.
This will se verely impair steerability and braking. Braking dis tance
ma yincrease in an emergency braking situation. &
WARNING Risk of skidding if ESP ®
is malfunctioning
If ESP ®
is malfunctioning ,ESP ®
canno tcarry out vehicle stabili‐
zation .Inaddition ,other driving saf etys ystems ar eswitched off. #
Driv eonc arefull y. #
Have ESP ®
ch eckedataq ualified specialis tworks hop. #
Switc hthe engine off, wait brief lyand star tt he engine again. #
Chec kwhether thed ispla ymessag ehas disappeared and ESP ®
is operational.
If th ed ispla ymessag econtinues tobe shown: #
Driv eonc arefull y. #
Consult aqualified specialis tworks hop immediatel y. 244
Displaymessa gesa nd warning and indicator lamps

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
0091
Check Coolant Level *T
he coolant le velist oo lo w.
* NO
TEEngine damag eduetoinsuf ficient coolant #
Avoid long journe yswit hinsuf ficient coolant. #
Addc oolant ,following then otes on coolant (/ page180).
If yo uf requ ently nee dtoadd coolant: #
Have thee ngine cooling sy stem checkedataq ualified specialist
wo rkshop.
00BD
Check Coolant Level See
Oper. Manual *T
he coolant le velist oo lo w.
* NO
TEEngine damag eduetoinsuf ficient coolant #
Avoid long journe yswit hinsuf ficient coolant. #
Addc oolant ,following then otes on coolant (/ page180).
If yo uf requ ently nee dtoadd coolant: #
Have thee ngine cooling sy stem checkedataq ualified specialist
wo rkshop.
00B2
Check Engine Oil Level
or Check Engine Oil At
Next Refueling *A
warning tone also sounds. The oi llev el in your vehicle has fallen to
th em inimum.
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil #
Avoid long journe yswit hinsuf ficient engine oil. #
Che cktheo il le velw hen next refueling, at thel atest
(/ page179). #
If necessa ry,a dd engin eoil (/ page179).
If engine oil frequently needs tobe topped up: #
Have thee ngine checkedataq ualified specialis tworks hop.
ManuallyC heck Oil Level *R
eminder tocheckt he oil le vel.
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil #
Avoid long journe yswit hinsuf ficient engine oil. #
Che cktheo il le velw hen next refueling, at thel atest
(/ page179). #
If necessa ry,a dd engin eoil (/ page179). #
Toconfir mthe oil le velc heck: press and hol dthe 0078 button.
00B2 Manually Check Oil Level *R
eminder tocheckt he oil le vel. 254
Displa ymessages and warning and indicator lamps

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
* NO
TEEngine damag ecaused bydriving wit hinsuf ficient
engine oil #
Avoid long journe yswit hinsuf ficient engine oil. #
Che cktheo il le velw hen next refueling, at thel atest
(/ page179). #
If necessa ry,a dd engin eoil (/ page179). #
Toconfir mthe oil le vel:press the0076 button.
00B2 StopV ehicle Turn Eng.
Off *T
he oil le velist oo lo w.Ther eisar isk of engin edamage. #
Stop immediately in accordance wit hthe traf ficc onditions and
switc hoffthee ngine. #
Secur ethe vehicle agains trolling away. #
Chec kthe oil le vel(/pag e179). #
If necessa ry,a dd engin eoil (/ page179).
00B2 Eng. Oil Level Low: Stop
Vehicl eSwitch Engine
Off *T
he oil le velist oo lo w.Ther eisar isk of engin edamage. #
Stop immediately in accordance wit hthe traf ficc onditions and
switc hoffthee ngine. #
Secur ethe vehicle agains trolling away. #
Chec kthe oil le vel(/pag e179). #
If necessa ry,a dd engin eoil (/ page179).
00D4 Fue lLevel Low *T
he fuel supply has dropped int othe reser verange. #
Refuel thev ehicle.
Ï *T
hereisv eryl ittle fuel in thef uel tank. #
It is absolutely essential torefuel at then eares tgas station. Ti
res Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
Please Correct Tire Pres-
sure *T
he tir epressur eist oo lo winatl eastone of thet ires, or thed iffe r‐
ence in tir epressu rebetween thei ndividual wheels is toog reat. #
Chec kthe tir epressur eatt he next opportunity . #
Correct thet irep ressur easn ecessar y. #
Restar tt he tir epressur emonitoring sy stem (/ page209).
Check Tires *A
warning tone also sounds.
The tire pressur einone or mor etires ha sdropped significantl y. Displ
aymessa gesa nd warning and indicator lamps 255

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions &
WARNING Risk of accident du etodriving wit hthe hood
unloc ked
The hood ma yopen and bloc kyour vie w. #
Neverrelease theh ood when driving. #
Befor eevery trip, ensur ethat theh ood is loc ked. #
Stop thev ehicle immediately in accordance wit hthe traf ficc on‐
ditions. #
Secu rethev ehicle agains trolling away. #
Close theh ood.
003D
or
0051 *I
na ddit ion, awarning tone sounds du ring thet rip.
The displa yshows theo pen door or doors. #
Close all thed oors.
00B2
Check Washer Fluid *T
hewasher fluid le velint hewasher fluid reser voir has dropped
belo wthe minimum. #
Addw ashe rfluid (/ page181).
00CC
0091
Pwr .Steerin gMalfunct. *A
warning tone also sounds. The steering po werassi stanc ecould be
malfunctioning. Youm aynee dtos teer mor eforcefully. #
Carefully continue toaq ualified specialis tworks hop and ha ve
th es teering checkedi mmediatel y.
00CC Power Steering Malfunc-
tion See Oper. Manual *A
warning tone also sounds. The po werassi stanc efor thes teering
could be malfunctioning. Youm aynee dtos teer mor eforcefully. #
Carefully continue toaq ualified specialis tworks hop and ha ve
th es teering checkedi mmediatel y.
Phone No Service *Y
our vehicle is outside thet ransmission and receiver rang eoft he
mobile phone networ kprovide r.
Shif tto' P' or 'N' to Start
Engine *
Yo uh ave attem pted tostar tt he engine in transmission position 005E
or 005B. #
Shif tthe transmission toposition 005Dor005C.
Auxiliary Battery Mal-
function *T
he auxiliary batteryfor thet ransmission is no longer being
ch arge d. #
Consult aqualified specialis tworks hop. 258
Displa ymessages and warning and indicator lamps

Lights
Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
0049
Check Left Low
Beam (exa mp le) *T
he cor responding light source is defective.
Ha ve defectiv eLED lights replaced at aqualified specialis twork‐
shop. #
Obser vethen otes on changing abulb (/ page80). #
Replace thef aulty bulb at thef ront (/ page81)or rear
(/ page83).
0049
Aut oLamp sIno perative *T
he light sensor is faulty .The automatic drivin glight saremalfunc‐
tioning. #
Swit chthel ight functions on/o ffmanually (/ page77). #
Consul taqualified specialis tworks hop.
0049
Auto Lamp Function
Inoperative *T
he light sensor is faulty .The automatic drivin glight saremalfunc‐
tioning. #
Swit chthel ight functions on/o ffmanually (/ page77). #
Consul taqualified specialis tworks hop.
0049
Malfunction See Opera-
tor’s Manual *T
heexterior lighting is malfunctioning. #
Consult aqualified specialis tworks hop.
*V ehicles wit htrailer hitch: afuse ma ybefaulty.
* NO
TEElectrica lfuses #
Obser vethei nformation in thes upplement. Youm ayoth‐
erwise failto recognize dangers. #
Che ckthef uses and replace an yblown fuses (see "Fuse assign‐
ment "supplement).
If th ed ispla ycontinues tosho wthe message: #
Consult aqualified specialis tworks hop. Indicator and
warning lamps Indicator and
warning lamps on thei nstru‐
ment clus ter Some sy
stems will per form aself-tes twhen the
ignition is switched on. Som eindicator and warn‐
ing lamps ma ybriefly light up or flash. This
behavior is non-c ritical. These indica tora nd warn‐
ing lamps indicat eamalfunction onl yiftheylight
up or flash af tert he engine has been star tedor
during ajourne y. 260
Displa ymessages and warning and indicator lamps