2021 MERCEDES-BENZ METRIS engine

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

Af
terl eaving thec arwa sh, pa yattention tothe
fo llowing:
R The outsid emirro rs aref ullyf olded out again
and an additional antenna is mounted again.
R Waxresidues on thew indshield and wiper
ru bber sare re movedtop reve nt smearing and
re duce wiper noise.
Re mo ve wa xresidues from thec amera lens in
ve hicles wit harear vie wcamer a(/ pag e184). Note
sonu se ofapowerwa sher &
WARNING Risk of an accident when
using po werw ashe rswit hround-spr ay
nozzles
The wate rjet can cause extern all yinv isible
damage.
Component sdamaged in this wa ym ayunex‐
pec tedlyf ail. #
Do no tuse ap owerwa sher wit hround-
spra ynozzle s. #
Have damaged tires or chassis parts
re placed immediatel y. *
NO
TEDama getocomponent pa rtsd ue
to improper high-pressur ecleaning Components can be damaged if
thed istan ce
of theh igh-pressur enozzle is toos mall. #
Maintain aminimum dis tance of about
12 in (30 cm) between theh igh-pres‐
sur enozzle and car parts. #
Do no tuse ap owerwa sher wit ha
ro und-spr aynozzle. #
Keep thew ater je tmoving cons tantly
whil ecleaning. #
Do no tclean thef ollowing components
wit hthe po werw ashe r:
R Electrical components
R Plug connecto rs
R Rear vie wcamera
R Driv etra in
R Seals
R Hoses *
NO
TEDama gecaused bytheu se of a
po we rw ashe rinthevehicle interior The pressurized
watercreated bythep ower
wa sher and thea ssociated spr aycould cause
considerable damag etothevehicle. #
Neveru se ap owe rwashe rinthevehicle
interior. *
NO
TEDama getothee xhau stgasa fter‐
treatments thro ugh incor rect cleaning Cleaning
thes ystem when warm orthe
ef fects of direct waterjetsi ntot he exhaust
pipe can damag ethe exhaus tgas af tertre at‐
ment. #
Only clean thes ystemw hen thes ystem
is cold. #
Do no tdirect thew ater je tint ot he
ex haus tpipe. Wa
shing thee ngine
* NO
TEDama geand malfunctions due to
wa shing thee ngine #
Toprev ent damag eand malfunctions of
th ee ngine, obser vethef ollowing
points:
R When using high-pressur eorsteam
cleaners, do no tpoint thew ater jet
directly at electrica lcomponents
and thee nd of electric cables.
R Mak esuret hat no watere nter sthe
ve nt and ventilation openings.
R Use prese rvativ eagentsint he
engine af terw ashing thee ngine.
R Protect theb elt driv efromp reser va‐
tio na gents. Wa
shing thev ehicle byhand Obser
vethel egal requ irements, fore xamp le in
man ycountries washing byhand is onl yallowed
at speciall ydesignated wash ba ys. #
Washthev ehicle wit hlukew armw ater and a
sof tcar sponge. When doing so, do not
ex pose thev ehicle todirect sunlight. #
Use amild cleanin gagent,e .g.aM ercedes-
Benz appr ovedcar shampoo. Maintenanc
eand care 18 3

To
avo id damag etothevehicle, follo wt he
instructions forc leaning and car eofthefollowing
ve hicle parts:
Wheels and rims
R Use watera nd acid-free alloy wheel cleaner.
R Do no tuse acidic allo ywheel cleaner sto
re mo vebrak edust. Otherwise, wheel bolts
and brak ecomponents could be damaged.
R Toavo id cor rosion of brak ediscs and brake‐
pads, driv efor afew minutes af terc leaning
befor eparking thev ehicle. The brak ediscs
and brakepads warm up and dr yout.
Wi ndo ws
R Clean thew indo wsinside and outsid ewitha
dam pcloth and wit hacleaning agent recom‐
mende dfor Mercedes-Benz.
R Do no tuse dr ycloth sora brasiv eorsolvent-
based cleaning agents toclea nthe inside of
windo ws.
Wi per blades
R Carefully clea nthe folded-a wayw iper blades
wit had ampcloth.
R Fold wiper ar mawayfromt herear wind ow
( / pag e87).
R Do no tclean thew iper blades tooo ften.
Exterior lighting
R Clean thec oversw ithaw etspong eand mild
cleaning agent, e.g .car sha mpoo.
R Onlyuse cleaning agents or clo thss uitable
fo rp last ic co vers.
Sensors R Clean thes ensor sinthe front and rear bump‐
er sw ithas oftc loth and car shampoo
(/ page110).
R When using apowe rwashe r,ke ep am inimum
dis tance of 12in (30 cm).
Re ar vie wcamera
R Vehicles with atailgate: switc hont he igni‐
tion and shif tthe transmission tothe 005Eposi‐
tion toopen thec amera co verw hen the
engine is switched of f(/pag e110).
R Usec lean wate rand asoftc loth toclea nthe
camer alens.
R Do no tuse ap owe rwashe r. Sliding door
R Remo vefore ign object sfromt he vicinity of
th ec ontact plates and contact pins of the
sliding door.
R Cleant he contact plates and contact pins
wit ham ild cleaning agent and asoftc loth.
R Do no toilor grease thec ontact plates and
th ec ontact pins.
Ta ilpipes
R Clean wit hacleanin gagent recommended for
Mercedes-Benz, especially in thew inter and
af te rw ashing thev ehicle.
R Do no tuse acidic cleaning agents.
Tr aile rhitch
Obse rvet he no tesonc areint he trailer hitch
manufacturer's operating instructions. Note
soni nterior care &
WARNING Risk of inju ryfrom pla stic
parts breakin goffafte rt he use of sol‐
ve nt-based care products
Ca reand cleaning products con tainin gsol‐
ve nts can cause su rfaces in thec ockpit to
become porous. When thea irbags are
deplo yed, plastic parts ma ybreak away. #
Do no tuse anyc areorc leaning prod‐
ucts containing sol vents toclea nthe
cockpit. &
WARNING Risk of inju ryor deat hfrom
bleached seat belts
Bleaching or dyeing seat belts can se verely
we aken them.
This can, fore xamp le, cause seat belt stotear
or fail in an accident. #
Neverb lea ch or dy eseat belts. To
avo id damag etothevehicle, obser vethef ol‐
lowing instructions forc leaning and care:
Seat belts
R Clean wit hlukewa rmsoap ywater.
R Do no tuse chemical cleaning agents.
R Do no tdryby heating abo ve176°F( 80 °C)
or in direct sunlight. Maintenance and care
18 5

#
Immedia tely rinse batter yacido ffthor‐
oughly wit hplenty of clean waterand
seek medica lattention immediately. St
arting assistance
* NO
TEDama gecaused bynume rous or
ex tende dattempts tostar tt he engine Numerous or
extende dattempts tostar tt he
engine ma ydamag ethe catalytic con verter
due tonon-combu sted fuel. #
Avoid numerous and extende dattem pts
to star tt he engine. Do no
tuse arapid chargin gdevicetos tart the
ve hicle. If your vehicle's batter yisdischar ged,
th ee ngine can be jump-s tarted from ano ther
ve hicle or from adonor batter yusing jumper
cables. Forthis purpose, thev ehicle has ajump-
st ar tc onnectio npointint he engine compart‐
ment.
When jump-s tarting, obser vethef ollowing points:
R The batter yisnotaccessible in all vehicles. If
th eo ther vehicle's batter yisnotaccessible,
st artin gassis tance is tobe pr ovided using a
dono rbatter yoras tartin ga ssis tance device.
R Youm ayonly jump-s tart thev ehicle when the
engine and exhaus tsystema recold.
R Do no tstart thee ngine if theb atter yisfro‐
zen.L ettheb atter ythawf irst.
R Startin gassis tance ma yonly be pr ovided
using batteries wit hanominal voltag eof12V.
R Onlyuse jumper cables that ha veas ufficient
cross-sectio nand insula tedt erminal clamps.
R Ifth eb atter yisfully dischar ged, attac hthe
donor batter yfor afew minutes before
attem pting tostart. This charge st he dis‐
ch arge db atter yalittle.
R Mak esuret hat thet wo vehicles do no ttouch.
Jumper cables and fur ther information rega rding
st artin gassis tance can be obtained at an yquali‐
fi ed specialis tworks hop.
Ensur ethe following befor econnectin gthe
jumper cables:
R The jumper cables are no tdamaged.
R Partsoft heterm inal clamps whic harenot
insulated do no tcom eintoc ontact wi thother me
talp arts while thej umper cables ar econ‐
nected totheb atter y.
R The jumper cables do no ttouc hm ovingp arts
when thee ngine is star teda nd while it is run‐
ning ,suc hast heV-belt pulle yorthefan. #
Apply thep arking brake. #
Shif tthe transmission toposition 005D. #
Switc hoffall electrical consumers, e.g. audio
device, blo wer. #
Switc hoffthei gnition immediately and
re mo vethek ey. #
Open theh ood (/ page176).
Connec tinga nd disconnecting the jumper
cables Example: jump-s
tart connection point #
Push contact pr otection co ver1ofthe
jump-s tart connection point towa rdst he rear
of thev ehicle agains tthe spring pressur eas
fa rasitw illg o.
The jump-s tart connection point is visible. 19 2
Breakdown assis tance

Te
rm inal connection diagram #
Remo vethec ove rfromp ositiv eterminal 3
of thed onor batter y. #
Connec tthe positiv eterminal clam pofthe
jumper cable topositiv eterminal 3ofthe
donor batter y,and then topositiv eterminal
5 ofthej ump-s tart connection point. #
Connect then egativ eterminal clam pofthe
jumper cable tonegati ve terminal 2ofthe
donor batter y,and then toground cont act4
of your ow nv ehicle. #
Startt he engine of thed onor vehicle and run
it at idling speed. #
Inser tthe keyintot he ignition loc k,star tt he
engine and le titrunfors eve ralm inutes. #
Befor edisconnecting thej umper cables,
switc honane lectrical consumer in your own
ve hicle, e.g. ther ear windo wheater or the
lighting. #
Disconnect then egativ eterminal clam pof
th ej umper cable from ground contact 4and
th en from negativ eterminal 2ofthed onor
batter y. #
Disconnect thep ositiv eterminal clam pofthe
jumper cable from positiv eterminal 5on
th ej ump-s tart connection point, and then
from positiv eterminal 3ofthed onor bat‐
te ry.
Con tact pr otection co ver1is automatically
re turned forw ards toits original position by
th es pring forc ea nd thej ump-s tart connec‐
tion point is closed. #
Position thec ove ronp ositiveterminal 3of
th ed onor batter y. #
Have theb atter ychec kedataq ualified spe‐
cialis tworks hop. Charging
the12Vb attery
* NO
TEDama getothee lectronics caused
by non-app rove dc harging devices Charging an ins
talled batter ywithab attery
ch arge rw hichh as no tbeen appro vedby
Mercedes-Benzc an damagethe on-board
electronics. #
Onlyuseab atter ycharger whic hhas
been appro vedbyM ercedes-Benza nd
whic hpermits chargin gthe battery
when it is ins talled in thev ehicle. #
Onlycharg ethe batter yusing thej ump-
st ar tc onnectio npoint. Ab
atter ychar gers pecially adapte dfor
Mercedes-Ben zvehicles and tested and appr oved
fo rM ercedes-Benz is available as an accesso ry.
Fu rther information is available from any
Mercedes-Ben zCommercial VanC enter.Re ad the
operating instructions fory our charge rb efore
ch argin gthe batter y.
Re charge theb atter ymoref requ entl yify ou use
th ev ehicle mainl yfor shor ttrips and/or driv eat
lo wo utsid etemperatures. #
Connec tthe batter ychar gertot he positive
te rm inal and ground con tact in thes ame
order as when connectin gthe donor battery
in thej ump-s tarting procedure.
% If
ab atter yisn otins talled and no tinservice,
yo us houl dcharg eite very thre em onths. This
helps tocounteract self-discharging and pre‐
ve nt damag etothe batter y.
12 Vb atter ycare
* NO
TEBatter ydisch arging du etoleakage
cur rent Dirty batter
yclamp sand batter ysurfaces
cause lea kage cur rent. Thi scan lead tothe
batter ydischarging. #
Keep theb atter yterminals and battery
sur faces clea nand dr y. *
NO
TEDama getotheb atter yhousing
due toimproper cleaning If
yo uu se cleanin gagentsc ontainin gfuel,
th ese can damag ethe batter yhousing. #
Do no tuse cleaning agentsc ontaining
fuel. Breakdown assis
tance 19 3

To
wing eyes torage location The
towing eyeisl ocated in thev ehicle tool kit
(/ page201). Installing/removing
thet ow ing eye Installin
gand removing the fron ttow ing eye
* NO
TEDama getothev ehicle due to
incor rect use of thet ow ing eye When
atow ing eyeisu sedtoreco verav ehi‐
cle, thev ehicle ma ybedamaged in thep roc‐
ess. #
Onlyusethet ow ing eyetot ow aw ayor
to ws tartthe vehicle. Fixtur
efor thef ront towing eyeintheb umper #
Take thet ow ing eyea nd scr ewdriver from the
ve hicle tool kit (/ page201).
Installing #
Press thea rrow on co ver1and remo ve
co ver 1from theo pening.
Yo uw ill see thef ixtur efor thet ow ing eye. #
Screw inthet ow ing eyec lockwise tothe
st op. #
Inser tthe scr ewdriver int othe towing eyeand
tighten thet ow ing eye. #
Stow th escrew driver in thev ehicle tool kit.
Re moving #
Remo vethes crew driver from thev ehicle tool
kit. #
Inser tthe scr ewdriver int othe towing eyeand
tur nthe towing eyec ounter-clockwise. #
Unscr ewand remo vethet ow ing eye. #
Inser tcover 1 withthe lug at thet op and
press it in at theb otto muntil it engages. #
Stow th etow ing eyea nd thes crew driver with
th ev ehicle tool kit.
Re ar towing eye Re
ar towing eyeu nder theb umper #
When towing or tow- startin gav ehicle, attach
th et ow ing devic etoreartowing eye2. #
Ifth ev ehicle is equipped wit hatrailer tow
hitch, attac hthe towing devic etothe trailer
to wh itch ( /pag e233). #
Obser vethen otes on permissible towing
me thods (/ page197). To
ws tarting vehicl e(eme rgency engine start) *
NO
TEDama getothea utomatic trans‐
mission due to towstarting The automatic transmissio
nmaybe damaged
in thep rocess of tows tartin gv ehicles with
automatic transmission. #
Vehicles wit hautomatic transmission
mus tnotbe tows tarted. #
Obser vethen otes and information on start‐
ing assis tance (/ page 191). 200
Breakdown assi stance

Note
sont hetech nical data
The given dat aonlya pplies tovehicles with
st andar dequipment. Youc an obtain fur ther infor‐
mation at aqualified specialis tworks hop. On-board electronics
Note
sonw orkont he engine electronics *
NO
TES Premature wearthro ugh
improper main tenance Imprope
rmaintenance ma ycause vehicle
components towe ar mor equickl yand the
ve hicle's operating permit ma ybeinvalidated. #
Alwaysh ave workon thee ngine elec‐
tronics and related components car ried
out at aqualified specialis tworks hop. Tw
o-w ayradios In
stallation no tesf or two- wayradios &
WARNING Risk of accident du eto
improper workon two-w ayradios
If two-w ayradios ar emanipulated or retrofit‐
te di ncor rectl y,thee lectromagnetic radiation
from thet wo -way radios can inter fere with
th ev ehicle electronics and jeopardize the
operating saf etyoft hevehicle. #
Yous houl dhave allworkon electrical
and electronic component scarried out
at aq ualified specialis tworks hop. &
WARNING Risk of accident du eto
improper operation of two-w ayradios
If yo uu se two- wayradios in thev ehicle
improperly ,their electromagnetic radiation
can disrup tthe vehicle's electronics. This is
th ec ase in thef ollowing situations, in partic‐
ular:
R The two-w ayradio is no tconnected toan
ex terior antenna.
R The exterior antenna is ins talled incor‐
re ctly or is no talow-reflection antenna.
Thi scould jeopardize theo perating saf etyof
th ev ehicle. #
Have thel ow -reflection exterior antenna
ins talled at aqualified specialis twork‐
shop. #
When operating two-w ayradios in the
ve hicle, alw aysc onnectt hemtothe
lo w- reflection exterior antenna. *
NO
TEInva lidation of theo perating per‐
mit due tofailur etoc omply wi th the
instructions fori ns tallation and use The operatin
gpermit ma ybeinvalidated if the
instructions fori ns tallation and use of two-
wa yradios ar enotobser ved. #
Onlyuse appr oved frequency bands. #
Obser vethem aximum permissible out‐
put po werint hese frequency bands. #
Onlyuse appr oved antenna positions. Use
Tech nica lSpecification ISO/T S21609 (Road
Ve hicles -EMC guidelines fori ns tallation of af ter‐
mar ketradio frequency transmitting equipmen t)
when retrofitting two-w ayradios. Comply wit hthe
legal requirements ford etachable parts.
If yo ur vehicle has ins tallation sfor two-w ayradio
equipment ,use thep ower suppl yorantenna con‐
nections intended foru se wit hthe ins tallation.
Obser vethem anufacturer's supplement sduring
ins tallation.
Tw o-w ayradio transmission output
The maximum transmission outputs (PEAK) at the
base of thea ntenna mus tnotexc eed thev alues
in thef ollowing table:
Fr equency band and maximum transmission
output Fr
equency band Maximu mtransmis‐
sion output
Sho rtwa ve
3–54M Hz 10
0W
4mw aveband
74 –88M Hz 30 W
2mw aveband
14 4–1 74MHz 50 W
Tr unked radio sys‐
te m/T etra
380 –460 MHz 10 W Te
ch nica ldata 225

Fr
equency band Maximu mtransmis‐
sion output
70 cm waveband
420 –450 MHz 35 W
Tw o-w ayradio
(2G/3G/4G) 10 WThe
following device scan be used in thev ehicle
without restrictions:
R Two-w ayradios wit hamaximum transmission
output of up to100mW
R Two-w ayradios wit htransmit terf requ encies
in the3 80 –410 MHz frequency band and a
maximu mtransmissio noutpu tofu pto2W
(trunked radio sy stem/T etra)
R Mobile phones (2G/3G/4G)
Ther eareno restrictions whe npositioning the
antenn aonthe outside of thev ehicle fort he fol‐
lowing frequenc ybands:
R Trunked radio sy stem/T etra
R 70 cm waveband
R 2G/3G/4G Ve
hicl eidenti fication pla te,v ehicle identifi‐
cation number (VIN )and engine number
Ve hicl eidenti fication pla te Ve
hicle identification plate 1is on theB -pillar
on thed rive r's side.
% The dat
aisvehicle-speci fica nd can dif fer
from that shown. Alw ayso bser vethes pecifi‐
cation sonyourvehicle's identification plate. Example:
vehicle identification plat e(US vehicles) Example:
vehicle identification plat e(Canada
ve hicles)
1 Vehicle manufacturer
2 VIN
3 Perm issible grossmassoft hevehicle
4 Perm issible grossmassofv ehicle combina‐
tion
5 Maximum permissible front axle load, vehicle
model
6 Maximum permissible rear axle load, engine
displacement
7 Dateofm anufacture
8 Paint code
Eng rave dV IN in the engin ecom partment 226
Tech nica ldata