2021 MERCEDES-BENZ METRIS MY21 Operator's Manual

Note
sonm aintenance
+ ENVIRONMEN
TALN OTE Environmental
pollution du etodisposal in anon-envi‐
ro nmentally-friendly manner If circums
tances demand that youh ave todo
some maintenanc eworky ourself, environ‐
mental pr otection requirements mus tbe
obser ved. When disposing of service prod‐
ucts, e.g. engin eoil,youm ustc ompl ywith
th el egal requ irements. This also includes all
components, e.g. filters, whic hhave come
int oc ontact wi thoperating fluids. #
Dispose of em ptyc ontainers, cleaning
clo thsa nd car eproducts in an environ‐
mentally responsible manner. #
Obser vethei nstruction sfor car eprod‐
ucts. #
Do no trun thee ngine forl onger than
necessar ywhen thev ehicle is station‐
ar y. When
working on thev ehicle, comply wit hall
saf etyr egulations, suc hasthe operating instruc‐
tions, regulations concerning hazardous materi‐
als, environmental pr otection measures, work
saf etya nd acciden tpreve ntion regulations.
Yo um usts ecur ethe vehicle on jac kstands of
suf ficient load-bearing capacity if workis being
car ried out underneat hthe vehicle.
Please also refertot he no tesa bout qualified spe‐
cialis tworks hops (/ page18).
The scope and regularity of thei nspection and
maintenanc eworkp rimaril ydepend on theo ften
diverse operating conditions .Inspection and
maintenanc eworkr equires special skills that
canno tbeacquired byreading these Operating
Instructions. This workshould onl ybecarried out
by trained pe rsonnel.
The vehicle Maintenance Bookle tdescribes the
scope and frequency of maintenance workand
contains additional no tesont he Limited War‐
ra nty .You will find information abou toperating
fl uids appr ovedfor Mercedes-Benz and capacities
under "Operatin gFluid sand Capacities"
(/ page 227).
Maintenance services mus tbecarried out in
accordance wit hthe instructions in theM ainte‐
nanc eBooklet. No tdoing so could void an ywar‐
ra nty claims and lead torefusa lofg oodwil lges‐
tures af tert he manufacturer has submitted a
damag ereport. Obser
vethei nformation under "Mercedes-Benz
GenuineParts" (/ page13). Se
rvice inter vald isplay Service inter
vald ispla yfunction The AS
SYST PLUS service inter vald ispla yont he
instrument clus terd ispla yprovide sinformation
on ther emaining time or dis tance be fore then ext
service due date.
Under arduous operating conditions or if thev ehi‐
cle is subjected toinc reased loads, theA SSYST
PLUS service inter vald ispla ymayshor tent he
service inter val.
Yo uc an obtain fur ther information concerning
th es ervicing of your vehicle from aqualified spe‐
cialis tworks hop. Displaying
thes ervice du edate( vehicles
without steering wheel but tons) Requ
irements:
R The vehicle is stationar y.
R The ignition is switched on.
Use theb uttons on thei nstrument clus ter. #
Press theÈbutton toselect thes ervice dis‐
pla y.
The displa ywill sho wapossible service mes‐
sage. #
Toexitth ed ispla y:press the0078button on
th ei nstrument clus ter. Displaying
thes ervice du edate( vehicles with
st eering wheel but tons) Re
quirements:
R The ignition is switched on.
On-boar dcomputer:
4 Service 5
ASSYS TPLUS
The next service due dat eisdisplayed. #
Toexitth ed ispla y:press the0076 or0038
st eering-wheel button. Maintenanc
eand care 175

Information on
regular maintenance work *
NO
TEPrematur ewear thro ugh failur eto
obser veservice due dates Maintenance
workwhic hisn otcar ried out at
th er ight time or incomple tely ca nleadto
inc reased wear and damag etothevehicle. #
Adher etot he prescribed service inter‐
va ls. #
Alwaysh ave thep rescribed mainte‐
nanc eworkc arried out at aqualified
specialis tworks hop. Note
sons pecial service requ irements The prescribed service inter
valisb ased on nor‐
mal vehicle use. Maintenance workwill need to
be per form ed mor eoften than presc ribed if the
ve hicle is operated under arduous operating con‐
ditions or increased loads.
Arduous operating conditions include:
R Regular city driving wit hfrequ ent intermedi‐
at es tops
R Frequent short-dis tance driving
R Frequent operation in mountainous terrain or
on poor road sur faces
R Whe nthe engine is of tenl eftidling forl ong
periods
R Operation in particula rlyd usty conditions
and/o rifair-reci rculation mod eisfrequ ent ly
used
In these or similar operating conditions, ha vethe
air filter ,engin eoil and oil filter ,for example,
re placed mor efrequ entl y.
If th ev ehicle is subjected toinc reased loads, the
tires mu stbe checkedm oref requ ently.Yo uc an
obtain fur ther information at aqualified specialist
wo rkshop. No
n-operational times with theb attery dis‐
connected The ASS
YSTP LUSs ervice inter vald ispla ycan
onl ycalculat ethe service due dat ewhen theb at‐
te ry is connec ted. #
Displa yand no tedown thes ervice due date
on thei nstrument clus terb efor edisconnect‐
ing theb atter y. R
Displ aying thes ervice due dat einvehi‐
cles without steering wheel buttons
(/ page175).
R Displ aying thes ervice due dat einvehi‐
cles wit hsteering wheel buttons
(/ page175). Engine comp
artment Opening and closing
theh ood &
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. &
WARNING Risk of accident and injury
whe nopening and closing theh ood
The hood ma ysuddenl ydropi ntot he end
position.
Ther eisar isk of injur yfor an yone in the
hood's rang eofm ovement. #
Do no topen or close theh ood if ther eis
ap erson in theh ood's rang eofm ove‐
ment. &
WARNING Risk of inju ryfrom touching
component sunde rvoltage
The ignition sy stem and thef uel injection sys‐
te mw orku nde rhigh voltage. Youc ould
re ceiv eane lectric shoc k. #
Nevertouc hcomponent softhe ignition
sy stem or thef uel injection sy stem
when thei gnition is switched on. The
following ar eexamp les of liv ecomponents:
R Ignitio ncoils
R Spar kplug connec tors
R Injectors &
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. 176
Maintenance and care

#
Allow thee ngine tocool down and only
to uc hc omponent parts desc ribed in the
fo llowing. *
NO
TEDama getohood or windshield
wiper swhen opening theh ood If
th ew indshield wiper shaveb een folded
bac kfromt he windshield when theh ood is
opened, thew indshield wiper sorthe hood
ma ybed amaged. #
Ensur ethat thew indshield wiper shave
no tb eenf olded bac kfromt he wind‐
shield. Opening
theh ood #
Pull handle 1torelease theh ood. #
Reachi ntot he gapa nd push le ver2ofthe
hood catc htothe left. #
Liftthe hood and hold it in place. #
Pull suppor tstrut 4outofh older 5and
guid eitu pwards in thed irection of thea rrow. #
Lowe rthe hood in suc hawaythat support
st rut 4 slides int orecess 3and theh ood is
fi xe dinp lace.
Closing theh ood &
WARNING Risk offire due toflammable
materials in thee ngine compartmen tor
on thee xhau stsystem
Flammable materials ma yignite. #
Ensur ethat ther ea reno flammable
ex tern al materials in thee ngine com‐
partmen torontheexhaus tsyst em
af te rm aintenance workhas been car‐
ri ed out. *
NO
TEDama getotheh ood due topress‐
ing it closed manually Pushing
theh ood closed wit hyour hands
could dama geit. #
Toclos ethe hood, le titdropf romt he
specified height. #
Hold suppor tstrut 4and raise theh ood
slightl y. #
Guide suppor tstrut 4toholder 5and
apply gentle pressur etoengageit. #
Lowe rthe hood and le titfall from aheight of
appr oximately 12in (30 cm), applying alittle
fo rc easy ou letitgo. #
Ifth eh ood can be lif teds lightl ymore, open
th eh ood once again and allo wittodropm ore
fo rc efull ysot hat it engages cor rectl y. Maintenance and care
17 7

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

fa
ces, e.g. MB SummerFit or MB Winter‐
Fit. Re
filling washer fluid Wa
sher fluid reser voir (e xamp le) #
Obser vethen otes on washer fluid
(/ page231). #
Pull cap 1upwards bythet ab. #
Addw ashe rfluid . #
Push cap 1ontothe filler openin guntil it
audibly engages. Cleaning and care
Note
sonw ashingthe vehicl einana utomatic
car wash &
WARNING Risk of accident du eto
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 suntil theb raking
ef fect has bee nfully restored. *
NO
TEDama getothev ehicle due toauto‐
matic braking When
thef ollowing function sareactivated,
th ev ehicle brakes automatically in cer tain sit‐
uations:
R ActiveB rake Assi st
R ActiveD ista nce Assi stDISTRONIC
R HOLD function
To avo id damag etothevehicle, deactivate
th ese sy stems in thef ollowing or similars it‐
uations: #
When towing #
Inac arwa sh *
NO
TEDama gedue tounsuitable car
wa sh #
Befor edriving int oacarwa sh make
sur ethat thec arwa sh is suitable fort he
ve hicle dimensions. #
Ensur ether eiss ufficient ground clear‐
ance between theu nderbody and the
guide rails of thec arwa sh. #
Ensur ethat thec learance widt hofthe
car wash, in particular thew idthoft he
guide rails, is suf ficient. To
avo id damag etoyourvehicle, obser vethef ol‐
lowing befor eusing an automatic car wash:
R ActiveB rake Assi stis deactivated.
R ActiveD ista nce Assi stDISTRONI Cisdeacti va‐
te d.
R The HOLD function is switched off.
R The side windo wsand roof ar ecomple tely
closed.
R Theo utside mi rror sa refolded in and an addi‐
tional antenn aisremoved, if present.
R The climat econtrol blo weriss witched off.
R The windshieldw iper switchisinposition005A.
If th ev ehicle is very dirty ,wash of fexcess dirt
befor ecleaning thev ehicle in an automatic car
wa sh. 18 2
Maintenance and care