2021 MERCEDES-BENZ METRIS MY21 Operator's Manual

Ke
ep children at asafed ista nce. Obser
vethese Operating Instructions.
Obser vethef ollowing no tes:
R Recharge theb atter ymoref requ entl yint he
fo llowing cases:
- Youp redominantl ydrive shor tdista nces.
- Youp redominantl ydrive at lo woutside
te mp eratures.
- Youl eave thev ehicle par kedf or alengt hy
period.
In order fort he batteries toachie vetheir max‐
imum possible service life, they mus talways
be suf ficiently charge d.
R Consult aqualified specialis tworks hop if you
wish tolea veyour vehicle par kedupf or a
long period of time.
R When youp arkt he vehicle, remo vethek eyif
yo udon otrequ irea nyelect rical consumers.
The vehicle will then use very little energy,
th us conservin gbatte ry powe r.
R Ifyo ur vehicle requ ires jump-s tarting, or if you
wish toprov ide jump-s tarting assis tance to
ano ther vehicle, only use thej ump-s tart con‐
nectio npoint in thee ngine compartment
(/ page191).
Installa tionlocations
Yo ur vehicle ma ybeequipped wit hthe following
th re eb atteries, depending on thee quipment ver‐
sion:
R Starterb atter yint he seat base of ther ight-
hand front seat
R Suppor tbatter yint he seat base of ther ight-
hand front seat
R Auxilia rybatter yinthe seat base of thel eft-
hand front seat St
arting assistanc eand chargin gthe 12 V
battery &
WARNING Risk ofexplosion from afro‐
zen battery
Ad ischar gedb atter ymayfreeze at temp era‐
tures slightl yabove or belo wfreezing point.
During startin gassis tance or batter ycharg‐
ing, batter ygas can be released. #
Alwaysa llowab atterytot hawb efore
ch argin gitorp erform ing startin gassis‐
ta nce. If
th ew arning/indicator lamps do no tlight up in
th ei nstrument clus teratt emperatures around or
belo wfreezing, it is highl yprobable that thed is‐
ch arge db atter yhas frozen.
In this case, obser vethef ollowing points:
R Do no tgivet he vehicle startin gassis tance or
ch arge theb attery
R The service lif eofabatterythat has been
th awe dmaybe reduced drastically
R The startin gbehavior ma ydeteriorate, partic‐
ularly at lo wtemperatures
R It is recommended that youh ave athawed
batter ychec kedataq ualified specialis twork‐
shop &
WARNING Risk ofexplosion during
ch argin gprocess and startin gassis tance
During thec harging process and starting
assis tance, theb atter ymayrelease an explo‐
siv eg as mixture. #
Avoid fire ,o pen flames ,creating spar ks
and smoking. #
Mak esuret her eiss ufficient ventilation. #
Do no tlea no verab atter y. &
WARNING Danger of chemical burns
from theb atter yacid
Batter yacid is caustic. #
Avoid contact wit hthe skin, eyes or
clo thing. #
Do no tlean overthe batter y. #
Do no tinhal ebattery gases. #
Keep children away from theb atter y. Breakdown assis
tance 191

#
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

*
NO
TEDama getotheb atter ythrough
self-discharging If dir
tenter sthe batter ycell, batter yself-dis‐
ch argin gwill accelerat eand theb atter ymay
be damaged. #
Onlyclean batteries when thec aps are
scr ewed on. Obser
vethef ollowing points on batter ycare: #
Regular lych eckt he batter yterminals and the
fast ening of then egativ ecable tothec hassis
to ensur ethat they aref irml yseated. #
Lightly grease theu ndersides of theb attery
te rm inal clamps wit hacid- resis tant grease. #
Only clean theb atter yhousing wit hcommer‐
cially available cleaning agents. Disconnecting and
removing the star terb at‐
te ry &
WARNING Risk ofexplosion from hydro‐
ge ng as igniting
The reisad anger of hydrogen gasigniting
when chargin gthe batter yifthereisas hort
circuit or spar ksstar ttof orm. #
Mak esuret hat thep ositiv eterminal of
th ec onnected batter ydoes no tcome
int oc ontact wit hvehicle parts. #
Neverp lace me talo bject sort ools on a
batter y. #
The described order of theb attery
clamps mus tbeobservedw hen con‐
necting and disconnecting theb atter y. #
When giving startin gassistance, alw ays
mak esuret hat youo nly connec tbattery
te rm inals wit hidentical polarity. #
During startin gassis tance, youm ust
obse rvet he described order forc on‐
necting and disconnecting thej umper
cable. #
Do no tconnect or disconnect theb at‐
te ry cla mp sw hile thee ngine is running. &
WARNING Danger of chemical burns
from theb atter yacid
Batter yacid is caustic. #
Avoid contact wit hthe skin, eyes or
clo thing. #
Do no tlean overthe batter y. #
Do no tinhal ebattery gases. #
Keep children away from theb atter y. #
Immedia tely rinse batter yacido ffthor‐
oughly wit hplenty of clean waterand
seek medica lattention immediately. *
NO
TEDama getoelectronic components
due towo rkcar ried out incor rectly on the
battery If
th es tarterb atter yisd isconnected before
th ek eyisremo vedf romt he ignition loc k,
electronic components or assemblies, such
as thea lternator ,can be damaged. #
Switc hoffthee ngine and remo vethe
ke yf romt he ignition loc k. #
Chec ktos eethat ther ea reno indicator
lamps lit in thei nstrument clus ter. #
Alwaysr emo vethen egativ eterminal
clam pfirst and then thep ositiv etermi‐
nal clamp. #
Do no tinter chang ethe batter yclamps. Alw
aysh ave workon theb atter ycarried out at a
qu alified specialis tworks hop.
If, in exceptional circums tances, youm ustd is‐
connec tthe batter yyourself, pa yattention tothe
fo llowing:
R Obser vethen otes on the12Vb attery
(/ page189).
R Secur ethe vehicle topreve nt it from rolling
aw ay.
R Forv ehicles wit hanautomatic transmission,
th et ransmission is loc kedinp osition 005Dafter
disconnecting theb atter y.Yo uc an then no
longer mo vethev ehicle.
R The batter yand thec over of thep ositiv eter‐
mina lclamp mus tbeinstalled securel yduring
operation. 194
Breakdown assis tance

Sea
tbase( example: right-han dfront seat)
The following description on connectin gand
ins talling theb atter yuses thee xamp le ofthe
st ar terb atter yint he seat base of ther ight-ha nd
front seat.
The auxiliar ybatter yisd isconnected and
re mo vedint he same wayast hestar terb atter y.
The auxiliar ybatter yislocated in thes eat base of
th el eft-hand front seat. #
Switc hoffall electrical consumers. #
Switc hoffthee ngine and remo vethek ey
from thei gnition loc k. #
Open thef ront right-han ddoor. #
Press bo thcatc hsprings 1down and
re mo vecover 2upwards from thes eat
base. #
Remo vecover 2bypulling upwards at an
angle from thes eat base. Open seat base (e
xamp le:right-han dfront seat) #
Remo vescr ews 5from holder 6. #
Remo veholder 6. #
Remo ve ve nt hose 4from thet op of theb at‐
te ry. #
Pull theb atter yout of thes eat base until the
negati ve terminal clam pcan be released and
re mo ved. #
Disconnect then egativ eterminal clam pfrom
negativ eterminal 3. #
Remo vethen egativ eterminal clam pinsucha
wa ythat theb atter yterminal clam pnolonger
to uches negativ eterminal 3. Example:
star terb attery #
Remo vetheb atter yfromt he seat base and
place it on thed oor sill as shown. If neces‐
sar y,hold theb atter ybyh andles 9. #
Remo vethep ositiv eterminal clam pcover
from positiv eterminal 7. #
Remo vepositiv eterminal clamp 8from pos‐
itiv eterminal 7. #
Remo vepositiv eterminal clamp 8in suc ha
wa ythat theb atter yclam pnol onger touches
positiv eterminal 7. #
Liftthe batter yout of thed oor sill byhandles
9. Connecting and installing
thes tar terb attery &
WARNING Risk ofexplosion from hydro‐
ge ng as igniting
The reisad anger of hydrogen gasigniting
when chargin gthe batter yifthereisas hort
circuit or spar ksstar ttof orm. #
Mak esuret hat thep ositiv eterminal of
th ec onnected batter ydoes no tcome
int oc ontact wit hvehicle parts. #
Neverp lace me talo bject sort ools on a
batter y. #
The described order of theb attery
clamps mus tbeobservedw hen con‐
necting and disconnecting theb atter y. #
When giving startin gassistance, alw ays
mak esuret hat youo nly connec tbattery
te rm inals wit hidentical polarity. #
During startin gassis tance, youm ust
obse rvet he described order forc on‐
necting and disconnecting thej umper
cable. Breakdown assis
tance 19 5

#
Do no tconnect or disconnect theb at‐
te ry cla mp sw hile thee ngine is running. *
NO
TEDama getotheo n-boar delectron‐
ics due tointer changing theb attery
clamps Incor
rectly connecting theb atter ycan dam‐
ag et he on-boar delectronics. #
Alwaysc onnectt he batter yasdescri‐
bed in thef ollowing sequence. Ne ver
re ve rset he term inal clamps. The
following description on connectin gand
ins talling theb atter yuses thee xamp le ofthe
st ar terb atter yint he seat base of ther ight-ha nd
front seat.
The auxiliar ybatter yisc onnected and ins talled in
th es ame wayast hestar terb atter y.The auxiliary
batter yislocated in thes eat base of thel eft-
hand front seat. Example:
star terb attery #
Place theb atter yont he door sill as shown
and secur ewithh andles 3if necessar y. #
Connec tpositiv eterminal clamp 2toposi‐
tiv et erminal 1.The positiv elead mus tbe
ro uted parallel tothes ide of theb atter yhous‐
ing in thec onnection area, as shown. #
Place thep ositiv eterminal clam pcover on
positiv eterminal 1. #
Fold bo thhandles 3down ont othe batter y. #
Push theb atter yintot he seat base until the
negati ve terminal clam pcan be connec ted. #
Connec tthe negativ eterminal clam ptonega‐
tiv et erminal 4. #
Push theb atter yintot he seat base as faras
it willg o. Open seat base wit
hinstalled batter y(example:
ri ght-han dfront seat) #
Connect vent hose 5totheb atter yconnec‐
tion at thet op, beside negativ eterminal 4. #
Place holder 7over thel owe redgeoft he
batter yhousing and thet hreadedh olesfor
scr ews 6. #
Screw on holder 7withs crews 6.
The batter yissecured topreve nt slipping. Sea
tbase( example: right-han dfront seat) #
Inser tcover 9 in front of theb atter ycom‐
partmen tdow nintot he seat base and close
it.
Catc hsprings 8of co ver9should engage
audibly.
Car ryout thef ollowing workafte rc onnecting the
battery: #
Resetthe side windo ws (/pag e58). #
Resetthe outside mir rors ( / pag e88). #
Resetthe electric sliding door s(/pag e50). 19 6
Breakdown assis tance

To
wing or tow- starting Overvie
wofpermissible towing me thods &
WARNING Risk of accident du etolimi‐
te ds afet y-re lated function sduring the
to wing process
Saf ety-re lated function sarelimited or no lon‐
ge ra vailable in thef ollowing situations:
R The ignition is switched off.
R The brak esystemorp owersteering sys‐
te mism alfunctioning.
R The energy supp lyor theo n-boar delectri‐
cal sy stem is malfunctioning.
When your vehicle is then towe da way,signifi‐
cantly mor eeffor tm aybe requ ired tosteer
and brak ethan is normally required. #
Use atow bar. #
Mak esuret hat thes teering wheel can
mo vefreely befor etow ing thev ehicle
aw ay. &
WARNING Risk of accident whe ntow ing
wit hsteering wheel lock
Yo uw ill no lon gerbea bletos teer thev ehicle
if th es teering wheel loc kisengaged. #
Alwayss witc hont he ignition when tow‐
ing thev ehicle wit hatowcable or atow
bar. &
WARNING Risk of accident du etotowing
aw ay avehicle that is tooh eavy
If th ev ehicle being tows tarted or towe da way
is heavier than thep ermissible gross weight
of your vehicle, thef ollowing situations may
arise:
R The towing eyem aybecome de tach ed.
R The vehicle/trailer combination ma yeven
tip ove r. #
Befor etow st artingort owing away a
ve hicle, checkt hat it does no texceed
th ep ermissible gross weight. De
tails on thep ermissible gross vehicle weight of
yo ur vehicle can be found on thev ehicle identifi‐
cation plat e(/pag e226). *
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 toincor rect connec‐
tion of thet ow bar or improper use of the
to wing device #
Onlyconnec tthe towr ope or towb arto
th et ow ing eyes or thet railer towh itch. #
Do no tuse thet ow ing eyes toreco vera
ve hicle. *
NO
TEDama gedue topulling forc eb eing
to oh igh If
yo up ullaway abruptl y,exc essiv epulling
fo rc ec ould damag ethe vehicles. #
Pull away as stra ight ,slowl yand
smoo thly as possible. *
NO
TEDama gedue toimproper towing
wit hat ow ro pe If
yo ui gnor esafet ya nd pr otectiv emeasures
when towing wit hatowrope, this can result
in damag etothevehicle.
Obser vethef ollowing points: #
Secur ethe towr ope on thes ame side
on bo thvehicles. #
Secur ethe towr ope tothet ow ing eyes. #
Do no texceed thel egall yprescribed
lengt hoft hetowr ope. #
Mar kthe towr ope in them iddle, e.g.
wit haw hitec loth (12x12in
(30 x30c m)). This will mak eother road
user sawarethat av ehicle is being
to we d. #
During thej ourne y,obser vetheb rake
lamps of thet ow ing vehicle and main‐ Breakdown assis
tance 197

ta
in thed ista nce so that thet ow ro pe
does no tsag. #
Do no tuse steel cables or chains to tow
yo ur vehicle. *
NO
TEDama gedue to to wing thev ehicle
at tooh igh aspeed or toof ar To
wing thev ehicle at tooh igh aspeed or too
fa rc an dama gethed rive train. #
Do no texceed atow ing speed of
31 mp h(50 km/h). #
Do no texceed atow ing distanc eof
31 miles (50 km). *
NO
TEDama getothea utomatic trans‐
mission when towing due toshifting into
transmission position 005D If
yo uo pen thed rive r's or co-driver's door
when towing, it can lead tothea utomatic transmission shifting
toposition 005Dand
becomin gdamaged. #
Shif tthe automatic transmission to
position 005C. #
Do no topen an ydoor sduring thet ow‐
ing process. When
towing away,y ou mus tobse rvet he legal
re qu irements fort he countr yinwhichyou are
cur rentl yd riving.
In thee vent of abreak down, Mercedes-Benz rec‐
ommends that youh ave thev ehicle transpor ted
ins tead of towe d.
Ha ve thev ehicle transpor tedonat ranspor teror
trailer if it has transmission dama ge.
Pe rm issible towing me thods Bo
th axle sont he
gr ound Fr
ont axle raised Re
ar axle raised
Ve hicles wit hauto‐
matic transmission Ye
s, no fur ther than
31 miles (50 km) at
31 mp h(50 km/h) No
Yes, if thes teering
wheel is fixe dint he
center position wit ha
st eering wheel loc k.
Maximum 31miles
(50 km) at 31mph
(50 km/h) %
If
th et ransmission cann otbe shif tedtop osi‐
tion 005C,h avet he vehicle transpor ted
( / pag e199) .At owing vehicle wit hlifting
equipment is requ ired forv ehicle transport. To
wing away thev ehicle wit hbotha xleson
th eg round #
Obser vethen otes on permissible towing
me thods (/ page197). #
Mak esuret hat theb atter yisc onnected and
ch arge d. If
th eb atter yisd ischar ged, obser vethef ollowing
points:
R The ignition canno tbeswitched on.
R The transmissio ncanno tbes hiftedtop osi‐
tion 005C.
Ve hicles with automatic transmission #
Switc hont he hazar dwarning lamps
(/ page78). #
Installth et ow ing eye( /pag e200). #
Secur ethe towing device. #
Swit chon thei gnition. 19 8
Breakdown assis tance