cooling MERCEDES-BENZ V-CLASS 2021 User Guide

Example: cap and coolant
expansion reser voir
Chec
Chec king t
king t he coolant lev
he coolant lev el
el #
Slowly turn the cap 1ofthe coolant expan-
sion reser voir2 half a turn anti-clockwise and
allow overpressure toescape. #
Turn cap 1further and remo veit.
The coolant le vel is cor rect in thefo llowing cases:
R Uptomar ker bar 3when the engine is cold
R Ifth e engine is warm, up to1.5 cm over
mar ker bar 3
T
T op up t
op up t he coolant
he coolant
Only use coolant appr oved for Mercedes-Benz to
av oid damaging the engine cooling system. #
Referto the information on coolant
(/ page 277). #
Re/ll the coolant up tothe mar ker bar 3in
th e /ller opening of the coolant expansion res-
er vo ir2. #
Replace cap 1and tighten in a clockwise
direction. #
Start the engine. #
Set thete mp erature in theve hicle interior to
th e maximum output on the control panel of
th e climate control. #
ATer about /ve minutes, switch o. the engine
again and allow it tocool down. #
Check the coolant le vel again and top up the
coolant if necessar y. F
F
illing up t
illing up t he windscr
he windscr een w
een washer syst
asher syst em
em &
W
WARNING
ARNING Risk of /re and injury from
windscreen washer concentrate
Wi ndsc reen washer concentrate is highly 0am-
mable. #
Avoid /re, naked 0ames, smoking and
th e creation of spar kswhen using wind-
screen washer concentrate. &
W
WARNING
ARNING Risk of burns from hot compo-
nent parts in the engine compartment
Cer tain component parts in the engine com-
partment can be very hot, e.g. the engine, the
cooler and parts of theex haust system. #
Allow the engine tocool down and only
to uch component parts described in the
fo llowing. *
N
NOOTE
TE Damage totheex terior lighting due
to unsuitable windscreen washer 0uid Unsuitable windscreen
washer 0uids may dam-
age the plastic sur face of theex terior lighting. #
Only use windscreen washer 0uids that
are also suitable for use on plastic sur fa-
ces, e.g. MB SummerFit or MB WinterFit. T
T
opping up t
opping up t he w
he washer
asher 0uid
0uid Wa
sher 0uid reser voir (e xamp le) #
Obser vethe no tes on windscreen washer 0uid
(/ page 277). #
Pull cap 1upwards bytheta b. #
Top up thewa sher 0uid. Main
tenance and ca re
229
229

Coolant
Coolant
N
No
ot
tes on coolant
es on coolant
Obser vethe no tes on operating 0uids
(/ page 271). &
W
W ARNING
ARNING Risk of /re‑ and injury from
antifreeze
If antifreeze comes into contact with hot com-
ponent parts in the engine compartment, it
may ignite. #
Allow theve hicle tocool down before
yo uto p up the antifreeze. #
Make sure that no antif reeze spills out
next tothe /ller opening. #
Thoroughly clean the antifreeze from
component parts before starting the
ve hicle. *
N
NOOTE
TE Damage caused byincor rect cool-
ant #
Only add coolant that has been premixed
with there qu ired antifreeze pr otection. Information on coolant is
available at thefo llowing
locations:
R Inthe Mercedes-Benz Speci/cation for Operat-
ing Fluids 320.1
- Athttps://be vo.mercedes-benz.com
- Inthe Mercedes-Benz BeVo app
R Ataqu ali/ed specialist workshop
* N
NOOTE
TE Overheating at high outside temp er-
atures If an inappropriate coolant is used,
the engine
cooling system is not su1cient lyprotected
against overheating and cor rosion at high out-
side temp eratures. #
Always use coolant appr ovedby
Mercedes-Benz . #
Obser vethe inst ructions in the
Mercedes-Benz Speci/cations for Oper-
ating Fluids 320.1. *
N
NOOTE
TE Paintwork damage due tocoolant #
Do not spill coolant on painted sur faces. Ha
ve the coolant regular ly replaced at a quali/ed
specialist workshop. No
tethe proportion of anti-cor rosion agent/anti-
freeze in the engine cooling system within thefo l-
lowing temp erature ranges:
R A minimum of 50% (antifreeze pr otection down
to about -37°C)
R A maximum of 55% (antifreeze pr otection down
to -45°C)
Capacities, coolant
Capacities, coolant
Engine cooling syst Engine cooling syst em
em Model
Model
Capacity
Capacity
All models Approx. 10.4 l
Appr ox. 13.4 l
on vehicles with auxili-
ary heating W
W
indscr
indscr een w
een washer
asher 0uid
0uid N
No
ot
tes on windscr
es on windscr een w
een washer
asher 0uid
0uid
Obser vethe no tes on operating 0uids
(/ page 271). &
W
WARNING
ARNING ‑ Risk of /re and injury due to
windscreen washer concentrate
Wi ndsc reen washer concentrate is highly 0am-
mable. It could ignite if it comes into contact
with hot engine component parts or the
ex haust system. #
Make sure that no windscreen washer
concentrate spills out next tothe /ller
opening. *
N
NOOTE
TE Damage totheex terior lighting due
to unsuitable windscreen washer 0uid Unsuitable windscreen
washer 0uids may dam-
age the plastic sur face of theex terior lighting. #
Only use windscreen washer 0uids which
are also suitable for use on plastic sur fa-
ces, e.g. MB SummerFit or MB WinterFit. *
N
NOOTE
TE Bloc ked spr aynozzles caused by
mixing windscreen washer 0uids #
Do not mix MB SummerFit and MB Win-
te rFit with other windscreen washer 0u-
ids. Do not use distilled or de-ionised
water. Otherwise,
th e /ll le vel sensor may give a false reading. Te
ch nical data
277
277

Displa
Displa
y messag
y messag es P
es P ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
The following causes are possible:
R The windscreen is dirty in the camera's /eld of vision.
R Visibility is impaired due toheavy rain, snow or fog.
If th e causes mentioned abo veno longer app ly,th e display message
will disappear and Tra1c Sign Assist will be operational again.
If th e display message does not go out: #
Stop in accordance with the tra1c conditions. #
Secure theve hicle against rolling away. #
Clean the windscreen.
ë
Off *T
he HOLD function has been deacti vated. The vehicle has star ted
skidding.
A wa rning tone also sounds. #
Switch the HOLD function on again later (/ page 164).
*T he HOLD function has been deacti vated. An activation condition will
no longer be met when the brake pedal is depressed.
A wa rning tone also sounds. #
Che ckthe activation conditions of the HOLD function
(/ page 164).
Â
Lowering *
The vehicle le vel may be lo weredfo rth efo llowing reasons:
R You ha veselected a di.erent drive prog ram.
R You ha veexceeded the speed limit.
Á Vehicle rising *
The vehicle le vel may be raised forth efo llowing reasons:
R You ha veselected a di.erent drive prog ram.
R You ha vefallen below the speed limit.
Á
Compressor is cooling *D
uetofrequent le velch anges within a short space of time, the com-
pressor /r stneeds tocool down toenable the selected driving le velto
be set.
When the compressor has cooled down, theve hicle will continue ris-
ing tothe selected vehicle le vel. #
Drive on in a manner appropriate forth e cur rent le vel. Make sure
th at there is su1cient ground clearance.
ä
Malfunction See Own-
er's Manual *A
IRM ATIC is functioning only toa limi tedex tent. The vehicle's han-
dling characteristics may be a.ected.
* N
NO OTE TE The tyres on the front axle or thefe nders could be
damaged bylarge stee ring mo vements #
Avoid lar gestee ring mo vements while driving and lis tenfor
scraping sounds. #
Ifyo u hear scraping sounds, pull over and stop theve hicle in
accordance with the tra1c conditions, and set a higher vehi-
cle le vel if possible. 294
294
Display message
s andwarning and indicator lamps

Displa
Displa
y messag
y messag es P
es P ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Monitor the coolant temp erature display ?onthe inst rument
cluster. #
Wait until the engine has cooled down. #
Ensure that the air supply tothera diator is not obstructed. #
Avoiding high engine loads, drive on tothe nearest quali/ed spe-
cialist workshop. In doing so, ensu rethat the coolant temp erature
display remains below 120°C.
? *T
hefan mo tor is defective. #
Check the coolant temp erature display ?onthe inst rument
cluster.
If th e coolant temp erature is below 120°C, you can continue driving
to the nearest quali/ed specialist workshop.
Av oid high engine loads, e.g. driving on hilly roads or stop-and-go driv-
ing.
+ Top up coolant See Own-
er’s Manual *T
he coolant le vel is too lo w.
* N NO OTE
TE Engine damage due toinsu1cient coolant #
Avoid long journe yswith insu1cient coolant. #
Top up with coolant, following the no tes on coolant
(/ page 228).
If yo u frequently need to top up the coolant: #
Have the engine cooling system checked at a quali/ed specialist
wo rkshop.
¸
Replace air cleaner *T
he engine air /lter is dirty and must be replaced. #
Consult a quali/ed specialist workshop.
4 Check eng. oil lev. when
next refuelling *A
warning tone also sounds. The oil le vel in your vehicle has fallen to
th e minimum.
* N NOOTE
TE Engine damage caused bydriving with insu1cient
engine oil #
Avoid long journe yswith insu1cient engine oil. #
Check the oil le vel when next refuelling, at the latest
(/ page 226). #
If necessar y,top up the engine oil (/ page 227).
If engine oil frequently needs tobe topped up: #
Have the engine checked at a quali/ed specialist workshop. 296
296
Display messages and
warning and indicator lamps

K
K
e
ey
y Displa
Displa
y messag
y messag es P
es P ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions
 Key does not belong to
vehicle *Y
ou ha veinser ted an incor rect key in tothe ignition loc k. #
Use the cor rect key.
 Remove key *T
hekey is in the ignition loc k. #
Remo vethekey.
Â
Replace key *T
hekey needs tobe replaced. #
Consult a quali/ed specialist workshop.
 Change key batteries *T
hekey battery is dischar ged. #
Replace the battery (/ page 52). V V
ehicle
ehicle Displa
Displa
y messag
y messag es P
es P ossible causes/conseq
ossible causes/conseq uences and
uences andM
MSolutions
Solutions
Clutch overheated Avoid
pulling away Engage/
disengage clutch quickly
if req. *A
warning tone also sounds. The clutch is under heavy load and the
permissible operating temp erature of the clutch has been exceeded.
Av oid frequent pulling away and driving at walking pace overex tended
distances. #
Stop in accordance with the tra1c conditions. #
Secure theve hicle against rolling away. #
Leavethe engine running.
The clutch will cool more quickly when the engine is running.
or #
If possible, continue driving at a steady speed. #
Remo ve yo urfoot from the clutch pedal and do not let the clutch
slip.
The clutch may also cool down during driving.
Cooling down can take afew minutes. When the clutch has cooled
down, the display message will disappear and the clutch will be fully
operational again.
Ò *T
hetailgate is open. #
Close theta ilgate. 300 300
Display message
s andwarning and indicator lamps

Displa
Displa
y messag
y messag es P
es P ossible causes/conseq
ossible causes/consequences and uences andM
MSolutions
Solutions #
Tocontinue your journe y,shiT the transmission toposition kor
h.
Risk of vehicle rolling
Vehicle not in P *A
warning tone also sounds. The driver's door is open and the trans-
mission is in position i,korh. #
ShiT the transmission toposition j. #
Secure theve hicle against rolling away.
Without changing gear,
consult workshop *A
warning tone also sounds. You can no longer change the transmis-
sion position due toa malfunction.
If transmission position hhas been selected: #
Without changing the transmission position, consult a quali/ed
specialist workshop.
If transmission position j,kori has been selected: #
Inform a quali/ed specialist workshop.
Reversing not poss. Con-
sult workshop *T
he transmission is malfunctioning. Transmission position kcann ot
be selected. #
Inform a quali/ed specialist workshop.
Transmission Malfunc-
tion Stop *T
he transmission is malfunctioning. The transmission automatically
switches toneutral i. #
Stop theve hicle immediately in accordance with the tra1c condi-
tions. #
ShiT the transmission toposition j. #
Inform a quali/ed specialist workshop.
Stop vehicle Leave
engine running Wait
Transmission cooling *T
he transmission is overheating. Pulling away may be temp orarily
impaired or not possible. #
Stop theve hicle immediately in accordance with the tra1c condi-
tions. Do not continue driving! #
Leavethe engine running. #
Wait until the display message disappears before pulling away.
&
inoperative Battery low *T
he on-board elect rical system voltage is too lo w.The hot-water auxili-
ary hea ter (stationary heater) has switched itself o. or cannot be
switched on. #
Drive for an extended distance.
The bat tery will be charge d. The hot-water auxiliary heater (sta-
tionary heater) will be operational again as soon as the on-board
electrical system voltage is su1cient.
& inoperative Refuel vehi-
cle *T
here is too little fuel in the fuel tank. The hot-water auxilia ryheater
(stationary heater) cann otbe switched on. #
Refuel theve hicle. 302 302
Display messages and
warning and indicator lamps

Fi
lling capacities.................................2 77
To pping up.......................................... 228
Coolant (engine)
Coolant (engine)
Notes................................................ .277
Cop
Cop yr
yright
ight.................................................... 28
Cor
Cor ner
nering light
ing light..........................................1 09
Cr
Cr osswind Assist
osswind Assist
Fu nction/no tes................................... 154
Cr
Cr uise contr
uise contr ol
ol
Ac tivating........................................... 158
Calling up a speed.............................. 158
Deactivating....................................... 158
Fu nction............................................. 157
Inc reasing/decreasing speed.............. 158
Le ver.................................................. 158
Re quirements:.................................... 158
Selecting............................................1 58
Setting the speed................................ 158
St oring a speed................................... 158
System limits...................................... 157
Cup holder
Cup holder
Switching the cooling/heating func-
tion on/o........................................... 103
Cup holders
Cup holders
Rear.................................................. .103 D
D
Dashboar Dashboar d lighting d lighting
see Instrument lighting
Dat
Dat a acq
a acq uisition (v
uisition (v ehicle)
ehicle)............................ 25
Dat
Dat a pr ot
a pr otection r
ection r ights
ights
Data storag e......................................... 28
Dat
Dat a st
a st or
orage
age
Data pr otection rights........................... 28
Electronic control units......................... 25
Service pr ovider.................................... 27
Da
Da ytime r ytime r unning lights
unning lights
Ac tivating/deactivating....................... 107
Re placing light sources...................... .114
Dealer
Dealer ship
ship
see Quali/ed specialist workshop
Declar
Declar ation of conf
ation of conf or
ormity
mity
Elect romagnetic compatibilit y............... 19
Impor ter addresses...............................22
Jack...................................................... 22
Speci/c absorp tionrate........................ 19
Wi reless vehicle component s................ 19
Demis
Demisting windscr ting windscr een een............................... 127
Des
Destination entry tination entry
Entering a POI or addre ss.................... 204 Diagnos
Diagnos
tics connection
tics connection .............................. .23
Dialling a phone number (on-board
Dialling a phone number (on-board
com com put
puter)
er)................................................. 188
Diesel
Diesel Low outside temp eratures................... 273
No tes................................................ .273
Digit
Digit al Owner's Manual
al Owner's Manual...............................15
Digit
Digit al r
al rear
ear vie
view mirr
w mirr or
or............................... 121
Dipped beam
Dipped beam
Setting for abroad (symmetrical)......... 107
Switching on/o.................................. 107
DIRECT SELECT lev
DIRECT SELECT lev er
er
Engage reve rsege ar........................... .142
Engaging drive position.......................1 43
Engaging neutral................................. 142
Engaging park position automaticall y... 143
Fu nction............................................. 141
Selecting park position....................... 143
Tr ansmission position s........................ 141
Displa
Displa y (car
y (care)
e)............................................ 233
Displa
Displa y (ins
y (instrtrument clust
ument clust er)
er)....................... 183
Displa
Displa y (MBUX multimedia syst
y (MBUX multimedia syst em)
em)
Operating........................................... 197
Displa
Displa y (multimedia syst
y (multimedia syst em)
em)
Home screen...................................... 197
Displa
Displa y message
y message
Calling up (on-board computer)........... 281
No tes................................................ .281
Dist
Dist ance adjus
ance adjustment tment
see Active Distance Assist DISTRONIC
Dist
Dist ance contr
ance control ol
see Active Distance Assist DISTRONIC
Dist
Dist ance w
ance w ar
arning function
ning function
see Active Brake Assist
DIS
DIS TR
TRONIC
ONIC
see Active Distance Assist DISTRONIC
Door
Door Activating/deactivating the auto-
matic locking mechanism...................... 55
Locking (emer gency key)...................... .55
Opening (from the inside)...................... 53
Unlocking (emer gency key).................. .55
Unlo cking (from the inside)................... 53
Door contr
Door contr ol panel
ol panel...................................... 14
Do
Do wnhill dr
wnhill dr iving
iving
see DSR (Downhill Speed Regulation)
Dr
Dr iv
ive pr
e pr ogr
ogram display
am display ............................... 144
Dr
Dr iv
ive pr
e pr ogr
ograms
ams
see DYNAMIC SELECT Index
317
317