2021 MERCEDES-BENZ METRIS engine overheat

Information on brakes
&
WARNING Risk of accident du etothe
brak esystem overheating
If yo ul eave your foot on theb rake pedal
when driving, theb rake system ma yoverheat.
This increases theb raking dis tance and the
brak esystemm ayeve nfail. #
Neveru se theb rake pedal as afootrest. #
Do no tdepress theb rake pedal and the
accelerator pedal at thes ame time
while driving. *
NO
TEWearing out theb rake linings by
continuously dep ressing theb rake pedal #
Do no tdepress theb rake pedal continu‐
ously whils tdriving. #
Touse theb raking ef fect of thee ngine,
shif ttoa lowe rgear in good time. Downhillg
radients
On long and steep downhill gradients yous hould
obse rvet he following instructions:
R invehicles wit hanautomatic transmission,
shif tdow ntos hiftranges 2or 1in good time
so that thee ngine is running at amediu mto
high engine speed (/ page106).
% Chang
ethe shif trang eing oodt ime when
cruise control is acti vated. Obser vethed riv‐
ing tips (/ page98).
Yo ut hereb ymakeu se of theb raking ef fect of the
engine and do no thave tobrak easo ften tomain‐
tai nt he speed. This relie vest he load on the
service brak eand pr events theb rake sf romo ver‐
heating and wearing tooq uickl y.
Heavy and light loads
If th eb rake sh ave been subjected toah eavy
load, do no tstopt he vehicle immediatel y.Drive
on foras hortwhile. The brakes cool down more
qu ickl yint he air flow.
If th eb rake sh ave been used onl ymoderately,
yo us houl doccasionall ytesttheir ef fectiveness.
To do this, brak emoref irml yfromah igherspeed
whil epaying attention tothet raffic conditions.
Th eb rake sw illg ripb ette rasar esult.
We troad sur faces
If yo uh ave been driving foral ong time in heavy
ra in without braking, ther em aybe adelayed
re sponse when youf irst apply theb rake s. This ma
yalso occur af terd riving thro ugh acarwa sh
or deep water.Yo um ustd epress theb rake pedal
mor efirml y.Maintai nagreater di stanc etot he
ve hicle in front.
While paying attention tothet raffic conditions,
yo us houl dbrake thev ehicle firm lyafte rd riving
on aw etroad sur face or thro ugh acarwa sh. This
heats theb rake discs so that they drym ore
qu ickl y,whic hprotects them agains tcorrosion.
Limited braking ef fect on salt-trea tedr oads:
R alayer of salt on theb rake discs or brakepads
can increase braking dis tances considerab ly,
or braking ma yhappen on onl yone side
R maintain an especiall ylarg esafed ista nce to
th ev ehicle in front
To remo vethel ayer of salt:
R appl ythe brakes from time totime ,paying
attention totraf ficc onditions
R carefully dep ress theb rake pedal at thee nd
of ajourne yand af tert he star tofan ewjour‐
ney
Checking theb rake pa dt hickness
In addition tomonitoring using theb rake pad wear
sensor ,regularly monitor and checka ll of the
brakepads byper form ing avisual inspection to
look form aterial wear on thep ads.
If yo ua reunabl etoc heckthe brakepad wear on
th ei nside of thew heels, remo vethew heels if
yo up ossess ther equired skills, or visit aqualified
specialis tworks hop.
If th eb rake pad material thickness is less than
0. 12 in (3 mm), ha vetheb rake pads checkeda nd
re placed at aqualified specialis tworks hop, if
necessar y.
Do no tsolely rely on theb rake pad wear sensor.
It is also strongly re commended that youh ave
th eb rake pads checkedataq ualified specialist
wo rkshop, no tonly at everyservice displa yedby
th em aintenanc einter vald ispla y,but also prior to
long journe ysand when everthe wheels are
re mo ved.
Chec kthe brakepads in thef ollowing cases:
R Ateve ryservice according tothem ainte‐
nanc einter val
R Befor elong journe ys
R Ateve rytirec hange
R Regular visual inspection fory our owns afety 100
Driving and pa rking

Manual parking brake
Applying or
releasing thep arking brake &
WARNING Risk of skidding or an acci‐
dent bybraking wit hthe parking brake
If yo uh ave tobrak eyour vehicle wit hthe
parking brake, theb raking dis tance is consid‐
erab lylonger and thew heels ma yloc k. There
is an increased risk of skidding and/or acci‐
dent. #
Only brak ethe vehicle wit hthe parking
brak eift he service brak ehasfailed. #
Inthis case, do no tappl ythe parking
brak ewitht oo muc hforce. #
Ifth ew heels loc k,immediately release
th ep arking brak easmuchasr equired
fo rt he wheels totur na gain. &
WARNING Risk offire and an acciden tif
th ep arking brak eisnotreleased
If th ep arking brak eisnotfull yreleased when
driving, thef ollowing situations can occur:
R The parking brak ecan overheat and cause
af ire
R The parking brak ecan lose its holding
function #
Comple tely release thep arking brake
befor edriving off. The brak
elights do no tlight up when youb rake
th ev ehicle wit hthe parking brake. #
Toappl ythe parking brake: depress parking
brak epedal 2firm ly.
The red0049 (onlyUSA)or0024(only Can‐
ada) indicator lam pinthe instrument clus ter
light supift he engine is running .Ifthevehicle
is in motion, awarning tone sounds. #
Torelease thep arking brake: depressthe
brak epedal and keep it depressed. #
Pull release handle 1.
The parkin gbrake isreleased abruptl y.The
red 0049 (onlyUSA)or0024(onl yCanada)
indicator lam pinthe instrument clus terg oes
out.
Pe rforming emer gency braking with thep ark‐
in gb rake If, in
exceptional cases, thes ervice brak efails,
yo uc an use thep arking brak etoperform emer‐
ge ncy braking. #
Pull release handle 1and slowl ydepress
parkin gbrake pedal 2. Pa
rking thev ehicle forane xtended period Pa
rking thev ehicle forl on gerthan four
we eks #
Connect thes tarter batter ytoatrick le
ch arge rv iaaj ump-s tart connection
(/ page 191).
or #
Disconnect all batteries (/ page194).
Pa rking thev ehicle forl on gerthan si xweeks #
Contact aqualified specialis tworks hop and
seek advice.
The vehicle can otherwise suf ferd ama geas a
re sult of lac kofuse. Driving and driving saf
etys ystems Note
sond riving sy stems and your responsi‐
bility Yo
ur vehicle is equipped wit hdriving sy stems
whic hassis tyou in driving, parking and maneu‐
ve ring thev ehicle. The driving sy stems ar eonly
aids. These cann otreplace your attention tothe
sur rounding sand do no trelease youf romy our
re sponsibility under road traf ficl aw .The driver is
re sponsible fort he dis tance tothev ehicle in
front, forv ehicle speed, braking in good time and
fo rs tayi ng in lane. Alw aysp ayattention tothe Driving and pa
rking 109

shop. This also applies
tocollisions at slow
speeds whe rether eisnov isible damag etothe
front end of thev ehicle. Setting
Activ eB rake Assi st On-boar
dcomputer:
4 DriveAssist 5
Active Brake Assist #
Select thed esired setting fort he warning/
re action tim eand press the0076 button.
The setting is retained when thev ehicle is
next star ted.
Deactivating Activ eB rake Assi st
% It is
recommended that ActiveB rake Assi stis
alw aysl efta ctivated. #
Select Offand press the0076 button.
The dis tance warning function and thea uton‐
omous braking function ar edeactivated. Also,
th es tatus appear sintheStatus overvie wof
the DriveAssist menu.
The next time thev ehicle is star ted, Ac tiveB rake
Assi stis automaticall yactivated wit hthe Medium
setting.
When ActiveB rake Assi stis activated, them ulti‐
function displa yshows the 00C7symbol.
At speeds up toappr oximately 20 mph
(30 km/h), them ultifunction displa yinvehicles
wit hA ctiv eParking Assis tfirst sho wsthe 005Dsta‐
tus indicator .Onlyf romas peed of appr oximately
20 mph(30 km/h) does them ultifunction display
sho wthe 005D symbol ins tead of the00C7 status
indicator. Cruise control
Fu
nction of cruise control
Cruise cont rola ccelerates and brakes thev ehicle
automaticall yinorder tomaintain apreviously
st ored speed.
If yo ua ccelerat etoovertake, fore xamp le,the
st ored speed is no tdele ted. If your emo veyour
fo ot from thea ccelerator pedal af tero vertaking,
cruise control will resume speed regulation back
to thes tore ds peed.
Yo uo perat ecruise control usin gthe cruise con‐
trol le ver.Yo uc an stor ea nyspeed abo ve20 mph
(30 km/h).
Obser vethen otes on driving sy stems and your
re sponsibility ,otherwise youc anno trecognize
danger s(/ page 109). Sy
stem limits
Cruise control ma ybeunable tomaintain the
st ored speed on uphill gradients. The stored
speed is resumed if theu phill gradient evens out
and thev ehicle's speed does no tfall below
20 mph(30 km/h).
On long and steep downhill gradients, yous hould
ch ang edowntoa lowe rgear in good time. Take
particular no teofthis when driving aladen vehi‐
cle. By doing so, youw ill mak euse of the
engine' sbraking ef fect. Thi swillt ak es ome of the
st ra in of fthe brak esystem and pr eventthe
brakes from overheating and wearing tooq uickl y.
If yo uc hang ewheel siz eonyourvehicle, checkit
is assigned tothec orrect wheel size catego ry
( / pag e218). If thec ategor yischanged without
re coding thec ont rolu nit sint hevehicle, thef unc‐
tionin gofcruise cont rolm aybe impaired.
Do no tuse cruise control in thef ollowing situa‐
tions:
R in traf fics ituations whe refrequent speed
ch anges ar erequired, e.g. in heavy traf ficor
on winding roads
R off-road or on con stru ction sites
R on slippe ryor slic kroads, as thed rive wheels
can lose traction when accelerating and the
ve hicle can then skid
R ifth er eisp oor visibility
Operating cruise control
Requ irements
R Cruise control is selected.
R The parkin gbrake has been released.
R ESP ®
is activated, but ma ynotinter vene.
R The driving speed is at leas t20m ph
(30 km/h).
R The brak epedal is no tdepressed. Driving and parking
11 5

Note
sonl oading guidelines &
DANG ER Risk of poisonin gfrome xhau st
ga ses
Combustion engines emit poisonous exhaust
ga ses, suc hascarbon monoxide. Exhaust
ga ses can enter thev ehicle interior if thet ail‐
gate orther ear-end door is open when the
engine is running ,especial lyifth ev ehicle is
in motion. #
Alwayss witc hoffthee ngine before
opening thet ailgat eortherear-end
door. #
Neverd rive thev ehicle when thet ail‐
ga te or rear-en ddoor is open. &
WARNING Risk of inju ryfrom unsecu red
object sinthevehicle
When objects ar eunsecured or inadequately
secured, they can slip, tip overorbet hrown
about, striking vehicle occupants.
This also appliest o:
R Luggag eorl oads
R Seats whic hhave been remo veda nd are
being transpor tedint hevehicle in an
ex ceptiona lcase
The reisar isk of injur y,particular lyin the
eve nt of braking maneuver sorabrupt
ch anges in direction. #
Alwayss towo bjectsins uchaw aythat
th ey canno tbetossed about. #
Befor etrave ling, secur eobjects, lug‐
ga ge or load topreve ntthem slipping or
tipping over. #
When aseat is remo ved, keep it prefera‐
bly outside thev ehicle. &
WARNING Risk of accident du etoincor‐
re ctly positioned load
The center of gr avity of thel oad can be too
high and/or toof ar towa rdst he rear.
This can significantl yimp air handlin gaswell
as steering and braking characteristics. #
Alwaysm akes uret hat thec enter of
gr av ity of thel oad is between thea xles
and as lo waspossible near ther ear
axle. &
WARNING Risk of accident du eto
exc eeding thep ermissible wheel/axle
loads or theg ross vehicle weight
The driving characteristics, as well as steering
and braking, ma ybegreatl yimp aired. Over‐
loaded tires ma yoverheat and bur stas ac on‐
sequence. #
When transpo rting aload, alw ays
obser vethep ermissible wheel loads,
axle loads and them aximum permissi‐
ble gross mass fort he vehicle (including
occupants). &
WARNING Risk of inju ryif unsuitable
climbin gaids ar eused
If yo uu se opening sinthevehicle's body work
or de tach able parts as steps, youc ould:
R Slip and/or fall.
R Damag ethe vehicle and thus slip and fall. #
Alwaysu se anti-slip, stable climbing
aids, e.g .asuitable ladder. *
NO
TEDama gecaused bytheu se of
openings in theb odywor kordetachable
par tasa step Using
thel owe rguide of thes liding door (car‐
ri age) as astepc an damag ethe trim and/or
mechanism of thes liding door. #
Do no tuse theg uide of thes liding door
(car riage) as astep. If
yo ua reusin gar oof luggag erack, please no te
th em aximum roof load and them aximum load
capacity of ther oof luggag erack( / pag e234).
The handling characteristic sofyourvehicle are
dependent on thel oad distribution.
Therefore, please obser vethef ollowing no tes
when loading:
R The load mus tnotprotru de abo vetheu pper
edg eoft he seat backrests.
R If possible, alw ayst ranspor tthe load in the
cargo compa rtment.
R fastenthel oad tothet ie-down eyes and dis‐
tribut ethe load evenl yamong them. 16 6
Transporting

#
Have theb rake fluid rene we datt he
specified inter vals. *
NO
TEDama getopaint, plastic or rubber
by brak efluid Ther
eisar isk of damag etoproperty if brake
fl uid comes int ocontact wi thpaint, plastic or
ru bber. #
If paint, plastic or rubber comes into
con tact wi thbrak efluid, rinse wi th
wate rimmediatel y. Obser
vethen otes on paintwork/matt efinish
paintwor kcare( /pag e184).
Ha ve theb rake fluid rene we de very twoy ear sat
aq ualified specialis tworks hop.
Only use brak efluid appr ovedbyM ercedes-Benz
in accordance wit hMB-Freigabe or MB-Appr oval
33 1.0.
Informatio nonbrake fluid is available at thef ol‐
lowing locations:
R IntheMBS pecification sfor operating fluids
33 1.0
- Athttps://be vo.mercedes-benz.com
- IntheB eVoa pp
R Ataq ualified specialis tworks hop Coolant
Note
sonc oolant
Obser vethen otes on operating fluids
(/ page227). &
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. *
NO
TEDama gecaused byincor rect cool‐
ant #
Only ad dcoolant that has been pre‐
mixed wit hthe requ ired antifreeze pro‐
te ction. Information on coolant is
available at thef ollow‐
ing locations:
R IntheMBS pecification sfor operating fluids
320.1
- Athttps://be vo.mercedes-benz.com
- IntheB eVoa pp
R Ataq ualified specialis tworks hop
* NO
TEOverheating at high outsid etem‐
peratures If an inappropriat
ecoolant is used, thee ngine
cooling sy stem is no tsufficiently pr otected
agains toverheating and cor rosion at high out‐
side temp eratures. #
Alwaysu se coolant appr ovedby
Mercedes-Benz. #
Obser vethei nstruction sinthe MB
Specifications foro perating fluids320 .1 . *
NO
TEPaint wo rkdamag eduetocoolant #
Do no tspill coolant on painted sur fa‐
ces. Ha
ve thec oolant regularly replaced at aqualified
specialis tworks hop.
No tethep roportion of anti-cor rosion agent/anti‐
freeze in thee ngine cooling sy stem within thef ol‐
lowing temp eratur eranges:
R Atleas t50% (antifreeze pr otection up to
about -35°F (-37°C))
R Maximum 55 %(antifreez eprotection up to
-49°F (-45°C))
Coolant capacities
Coolant capacity Mode
lC apacity
All model sA pprox.11USqt
(10.4 l) 230
Tech nica ldata

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
The batter yisnolonger being charge df or one of thef ollowing rea‐
sons:
R Faulty alternator
R Torn pol y-Vb elt
R Malfunction in thee lectronics #
Stop immediately in accordance wit hthe traf ficc onditions and
switc hoffthee ngine.
Do no tcontinue driving. If youd o,thee ngine ma yoverheat. #
Secur ethe vehicle agains trolling away. #
Consult aqualified specialis tworks hop.
00AC
Stop Vehicle Turn Eng.
Off *A
warning tone also sounds. The coolant is tooh ot. #
Stop immediately in accordance wit hthe traf ficc onditions and
switc hoffthee ngine. &
WARNING Risk of bu rnsw hen opening theh ood
If yo uo pen theh ood when thee ngine has overheated or when
th er eisaf ireint he engine compartment, thef ollowing situa‐
tions ma yoccur:
R Youc oul dc om eintoc ontact wi thhotg ases.
R Youc oul dc om eintoc ontact wi thother hot, escaping oper‐
ating fluids. #
Befor eopening theh ood, allo wthe ove rheated engine to
cool down. #
Inthee vent of afireint he engine compartment, keep the
hood closed and call thef ires ervice. &
WARNING Risk of scalding from ho tcoolant
If yo uo pen thec ap, youc oul dbes calded. #
Letthe mo torc ool 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. #
Obser vethec oolant temp eratur edispla y(/pag e142). #
Wait until thee ngine has cooled down. #
Ensur ethat thea ir supply tother adiator is no tobstructed. #
Avoiding high engine loads, driv eontothe neares tqualified spe‐
cialis tworks hop. In doing so, ensur ethat thec oolant temp era‐
tur ed ispla yremain sbelo wt he letter H. 252
Displa ymessages and warning and indicator lamps

Displa
ymessages
Possible causes/consequences and 0050 0050Solutions
00AC
Coolant Too Hot: Stop
Vehicle Switc hEngine
Off *A
warning tone also sounds. The coolant is tooh ot. &
WARNING Risk of bu rnsw hen opening theh ood
If yo uo pen theh ood when thee ngine has overheated or when
th er eisaf ireint he engine compartment, thef ollowing situa‐
tions ma yoccur:
R Youc oul dc om eintoc ontact wi thhotg ases.
R Youc oul dc om eintoc ontact wi thother hot, escaping oper‐
ating fluids. #
Befor eopening theh ood, allo wthe ove rheated engine to
cool down. #
Inthee vent of afireint he engine compartment, keep the
hood closed and call thef ires ervice. &
WARNING Risk of scalding from ho tcoolant
If yo uo pen thec ap, youc oul dbes calded. #
Letthe mo torc ool 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. #
Stop immediately in accordance wit hthe traf ficc onditions and
switc hoffthee ngine. #
Monitor thec oolant temp eratur edisplay 00AConthei nstrument
clus ter. #
Wait until thee ngine has cooled down. #
Ensur ethat thea ir supply tother adiator is no tobstructed. #
Avoiding high engine loads, driv eontothe neares tqualified spe‐
cialis tworks hop. In doing so, ensur ethat thec oolant temp era‐
tur ed ispla yremain sbelo wt he redm arking.
00AC *T
hefanm otorisd efective.
Ve hicles without steering-wheel buttons: #
Chec kthe coolant temp eratur e(/pag e142).
Ve hicles wit hsteering-wheel buttons: #
Chec kthe coolant temp eratur edisplay 00AConthei nstrument
clus ter.
If th ec oolant temp eratur eisbelowt he maximum value specified
belo w,youc an continue drivin gtothe neares tqualified specialist
wo rkshop.
Av oid high engine loads, e.g. driving on hill yroads or stop-and-go
driving.
During normal driving and if thec oolant le velisc orrect, thec oolant
te mp eratur edispla yisp ermitted torise toletter H. Displa
ymessages and warning and indicator lamps 253

Wa
rning/indicator
lamp Po
ssible causes/consequences and 0050 0050Solutions R
Invehicles without steering-wheel buttons –viathed ispla yon
th eo n-boar dcomputer
R Invehicles wit hsteering-wheel buttons –viathea nalog dis‐
pla yont he instrument clus ter #
Do no tres tart thee ngine until thec oolant temp eratur eisbelow
th es pecified maximum value. If youd o,thee ngine ma ybedam‐
aged. #
Driv eontot he neares tqualified specialis tworks hop. Avoid high
engine loads, e.g. driving on hill yroads or stop-and-go driving.
During normal driving and if thec oolant le velisc orrect, thec oolant
te mp eratur edispla yisp ermitted torise toletter Hor ther ed mar k.
00AC
Coolan twarning lamp *The
redc oolant warning lam pisonw hilethee ngine is running .A
wa rning tone also sounds.
The coolant temp eratur ehasexc eeded them aximum value specified
belo w.The air supply tother adiator ma ybeimpaired or thec oolant
le ve lm aybe tool ow.
The engine has no tbeen suf ficiently cooled and ma ybedamaged. &
WARNING Risk of bu rnsw hen opening theh ood
If yo uo pen theh ood when thee ngine has overheated or when
th er eisaf ireint he engine compartment, thef ollowing situations
ma yoccur:
R Youc oul dc om eintoc ontact wi thhotg ases.
R Youc oul dc om eintoc ontact wi thother hot, escaping operat‐
ing fluids. #
Befor eopening theh ood, allo wthe ove rheated engine to
cool down. #
Inthee vent of afireint he engine compartment, keep the
hood closed and call thef ires ervice. #
Paya ttention tothed ispla ymessages. #
Stop immediately in accordance wit hthe traf ficc onditions and
switc hoffthee ngine. #
Secur ethe vehicle agains trolling away. #
Exit thev ehicle and keep asafed ista nce from it unti lthe engine
has cooled down. #
Chec kthe coolant le vela nd add coolant, complyin gwitht he
instructions (/ page180). #
Ifth ec oolant has tobe topped up frequentl y,ha ve thee ngine
cooling sy stem checkedataq ualified specialis tworks hop. #
Ensur ethat thea ir supply tother adiator is no timp aired, e.g. by a
plastic bag that has been blown ont othe grille. #
Chec kthe coolant temp erature: Displa
ymessages and warning and indicator lamps 267