2021 MERCEDES-BENZ V-CLASS check engine

%
When theq button of theke y is prog ram-
med for operating theta ilgate (/ page 62),
yo u can also use theke yto open and close the
ta ilgate.
Opening and closing t
Opening and closing t he r
he rear window
ear window &
D
DAN
AN GER
GER Risk of poisoning from exhaust
ga ses
Combustion engines emit poisonous exhaust
ga ses, such as carbon monoxide. Exhaust
ga ses can enter theve hicle interior if there ar
wind owis open when theve hicle is running,
especially if theve hicle is in motion. #
Always switch o. theve hicle before
opening there ar wind ow. #
Never drive with there ar wind owopen. R
R
eq
eq uir
uir ements:
ements:
R The vehicle or load compartment is unloc ked
and theta ilgate is closed.
R T
To open using t
o open using t hekey:
he key:
- The vehicle is /tted with an EAS Y-Pa ck tail-
ga te and theq key but ton is prog ram-
med toopen there ar wind ow
( / page 62) or theve hicle is equipped
with the Bunk Package.
Opening
Opening #
Press theq button on thekey.
or #
Press button 1onthe handle on there ar win-
do w.
Closing
Closing #
Swing there ar wind owdown and push it
closed. Pr
Pr
ogr
ogr amming t
amming t heke
he key butt
y butt on f
on for t
or the t
he t ailg
ailgat
ate or r
e or r ear
ear
window
window
R R eq
eq uir
uir ements:
ements:
R The tailgate and there ar wind oware closed.
R The vehicle is switched on.
If yo ur vehicle is /tted with an EAS Y-PA CK tailgate,
yo u can prog ram theq button on thekey
either toopen/close theta ilgate or toopen the
re ar wind ow. #
Press the buttons in the handle of theta ilgate
and in the handle of there ar wind owsimulta-
neously for appr oximately /ve seconds.
ATer successfully changing the function, the
ve hicle turn signal lamps 0ash once. #
Check the function of theq button on the
key. Side window
Side window
Opening and closing t
Opening and closing t
he side windows
he side wind ows &
W
WARNI NG
ARNI NGRisk of becoming trapped when
opening a side wind ow
When you open a side windo w,parts of the
body could be dr awn in or become trapped
between the side window and window frame. #
When opening, make sure that nobody is
to uching the side windo w. #
If someone is trapped, release the button
immediately or pull it in order toclose
th e side window again. &
W
WARNING
ARNING Risk of becoming trapped when
closing a side window
When closing a side windo w,body parts could
be trapped in the closing area in the process. #
When closing, make sure that no body
parts are in the closing area. #
If someone is trapped, release the button
immediately or press the button in order
to reopen the side windo w. &
W
WARNI NG
ARNI NGRisk of becoming trapped when
ch ildren operate the side windo ws
Children could become trapped if they operate
th e side windo ws, particular lywhen unat ten-
ded. 62
62
Opening and closing

R
R
ectifying pr
ectifying pr oblems wit
oblems with t
h the ho
he ho t-w
t-wat
ater auxiliary
er auxiliary
heat
heat er
er
F
F AIL
AIL ¨
¨appear
appear s on t
s on the r
he remot
emot e contr
e contr ol display
ol display
Po ssible cause:
R Signal transmission between transmit ter and
re ceiver is malfunctioning. #
Change your position in relation totheve hicle,
moving closer if necessar y.
F
F AIL appear
AIL appear s on t
s on the r
he remot
emot e contr
e contr ol display
ol display
Po ssible cause:
R The star ter battery is not su1ciently charge d. #
Char gethe star ter batter y.
Po ssible cause:
R The fuel tank is not /lled up tothere ser ve
le ve l. #
Refuel at the nearest /lling station.
F
F AIL appear
AIL appear s on t
s on the r
he remot
emot e contr
e contr ol displa
ol displa y
y¯
¯
Po ssible cause:
R The auxiliary heating has malfunctioned. #
Have the auxiliary heating checked at a quali-
/ed specialist workshop. A
A
uxiliar
uxiliar y w
y war
arm-air heat
m-air heat er
er F
F
unction of t
unction of t he auxiliar
he auxiliary w
y w ar
arm-air heat
m-air heat er
er
Obser vethe no tes on auxiliary heating
(/ page 129).
The air-in take opening forth e auxiliary warm-air
hea ter is located on the inner side of the leT front
seat base. The warm-air outlet is on there ar side
of the leT front seat.
The auxiliary warm-air hea ter supplements the cli-
mate control system of your vehicle and has an
auxiliary heating function.
The stationary heater will switch o. automatically
when theve hicle is switched o. or when the set
heating duration has elapsed.
The immediate heating mode of the auxiliary heat-
ing supports the climate control system when the
engine is running and the outside temp erature is
lo w.
The switch clo ckforth e auxiliary warm-air hea ter
is located in the lo wer centre console.
Yo u can use the switch clock toset up tothree
departure times for pre-entry climate control. Switc
Switc h cloc h cloc kov
k over ervie
vie w (auxiliar
w (auxiliar y w
y war
arm-air heat
m-air heat er)
er) 1
Select option / change values
2 Menu bar
3 Select option
4 Pressing brie0y :con/rms a selection or set-
ting
Pressing and holding: switches immediate
heating mode on/o.
5 Status bar
6 Pressing brie0y: switches switch clock on /
cancels or term inates the settings in a menu
Pressing and holding: term inates all functions
Switc
Switc hing t hing t he switc
he switc h cloc
h clock on (auxiliar
k on (auxiliar y w
y war
arm-air
m-air
heat
heat er)
er) #
Press button 6.
% The switch clock will switch tostandby mode
aTer ten seconds. The display will go o..
Se
Se tting t
tting t he switc
he switc h cloc
h clock (auxiliar
k (auxiliar y w
y war
arm-air heat
m-air heat er)
er)
Se
Se tting t
tting t he time
he time
Yo u must reset the da y,time and default value for
th e operating duration in thefo llowing cases:
R initial operation
R aTer a voltage supply inter ruption (e.g.if the
battery has been disconnected)
R aTer a malfunction #
Press button 1or3 until 4 0ashes on
menu bar 2. #
Press button 4. #
Press button 1or3 until Î0ashes. #
Press button 4. #
Use button 1or3 toset the hours. Climate control
133
133

Dr
Dr
iving
iving K
K
e
ey positions
y positions &
W
WARNING
ARNING Risk of accident and injury due
to leaving children unattended in theve hi-
cle
If ch ildren are leT unattended in theve hicle,
th ey could, in particular:
R open doors, thereby endangering other
persons or road users.
R getout and be struck byoncoming tra1c.
R operate vehicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. #
Never lea vechildren unattended in the
ve hicle. #
When leaving theve hicle, alw aysta ke the
ke y with you and lock theve hicle. #
Keep theve hicle key out of there ach of
ch ildren. &
D
DAN
AN GER
GER Risk of fata l injuries caused by
ex haust gases
Combustion engines emit poisonous exhaust
ga ses such as carbon monoxide. Inhaling these
ex haust gases is hazardous tohealth and leads
to poisoning. #
Never lea vetheve hicle or, if present, the
stationa ryheater running in an enclosed
space without su1cient ventilation. &
W
WARNI NG
ARNI NGRisk of /re due to0ammable
material in the engine compartment or the
ex haust system
Flammable materials may ignite. #
Therefore, check regular lythat there are
no 0ammable materials in the engine
compartment or on theex haust system. g
Inserting/ removing thekey
1 Switching on the po wer supply
2 Switching on vehicle
3 Starting theve hicle
% Ifth eke y does not belong totheve hicle, it can
still be turned in the ignition loc k.The vehicle
is not switched on and cann otbe star ted. #
Insert theke y in tothe ignition lock in position
g and turn it tothe desired position. R
R
unning-in not
unning-in not es
es Pr
otect the engine during the /rst 1,500 km by:
R driving at varying road and engine speeds.
R shiTing tothe next highest gear at theve ry lat-
est when the needle reaches the last third
before there d area in there v counter.
R avoiding stress on theve hicle such as driving
at full thro ttle.
R not shiTing manually toa lo werge ar to brake.
R aTer 1,500 km, gradually increasing the engine
speed and accelerating theve hicle up tofull
speed.
R v
vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: not
dep ressing the accelerator pedal be yond the
pressure point (kickdown).
This also applies if the engine or parts of the drive-
train ha vebeen replaced.
Also obser vethefo llowing running-in no tes:
R ATer theve hicle has been deli vered or aTer
re pairs, the sensor system of some driving sys-
te ms and driving saf ety systems adjusts itself
automatically aTer theve hicle has been driven
a cer tain distance. Full system e.ectiveness is
not reached until the end of this teach-in proc-
ess.
R New or exch anged brakepads, brake discs and
tyres only pr ovide optimal braking and bonding
aTer se veral hundred kilometres. Until then, 136
136
Driving and parking

R
Ifth e typical outline of a pedestrian cannot be
distinguished from the backg round.
R If a pedestrian is not de tected as such, e.g.
due tospecial clo thing or other objects.
R In bends with a nar row radius. A
A
ctiv
ctiv ating or deactiv
ating or deactiv ating A
ating Activ
ctive Br
e Br ak
ake Assist
e Assist On-board computer:
4 ò 5
Settings 5
Assistance
5 Active Brake Assist
% It isrecommended that Active Brake Assist is
alw ays leT activated. #
T
To activ
o activ at
ate/deactiv
e/deactiv at
ate:
e: press thea button.
The distance warning function and the autono-
mous braking function of Active Brake Assist
are deactivated or acti vated.
When the functions are deactivated, theæ
symbol appears in the assistance graphic in
th e inst rument cluster displa y.
The next time theve hicle is star ted, Ac tive Brake
Assist is automatically acti vated. F
F unction of A
unction of A dap
daptiv
tive Br
e Br ak
ake Lights
e Lights Ad
aptive brake lights warnfollowing tra1c in an
emer gency braking situation with thefo llowing sig-
nals:
R By 0ashing the brake lamps
R By activating the hazard warning lights
If th eve hicle is braked sharply from speeds abo ve
50 km/h, the brake lamps 0ash rapidl y.This pro-
vides tra1c tr avelling behind you with an even
more noticeable warning.
If th eve hicle is tr avelling at speeds of more than
70 km/h at the beginning of the brake application,
th e hazard warning lights switch on once theve hi-
cle is stationar y.When pulling away again, the haz-
ard warning lights switch o. automatically at
appr oximately 10 km/h.
Yo u can also switch o. the hazard warning lights
using the hazard warning button (/ page 108). Cr
Cr uise contr
uise contr ol and limit
ol and limit er
er F
F
unction of cr
unction of cr uise contr
uise control
ol
Cruise control accelerates and brakes theve hicle
automatically in order tomaintain a pr eviously
stored speed. If
yo u accelerate toove rtake, forex ample, the
stored speed is not dele ted. If youre mo veyour
fo ot from the accelerator pedal aTer overtaking,
cruise cont rol will resume speed regulation back to
th e stored speed.
Yo u operate cruise control using the cruise control
le ve r.Yo u can store any speed abo ve30 km/h.
Obser vethe no tes on driving systems and your
re sponsibility; you may otherwise failto recognise
dangers (/ page 152).
Syst
Syst em limits
em limits
Cruise cont rol may be unable tomaintain the
stored speed on uphill gradients. The stored speed
is resumed if the uphill gradient evens out and the
ve hicle's speed does not fall below 30 km/h.
On long and steep downhill gradients, you should
ch ange down toa lo werge ar in good time. Take
particular no teof this when driving a laden vehicle.
By doing so, you will make use of the engine's
braking e.ect. This will take some of the strain o.
th e brake system and pr event the brakes from
ov erheating and wearing tooqu ickl y.
If yo uch ange wheel size on your vehicle, check it
is assigned tothe cor rect wheel size category
(/ page 260). If the category is changed without
re coding the control units in theve hicle, the func-
tioning of cruise control may be impaired.
Do not use cruise control in thefo llowing situa-
tions:
R in tra1c situations where frequent speed
changes are requi red, e.g. in heavy tra1c or on
winding roads
R o.-road or on construction sites
R on slippery or slick roads, as the drive wheels
can lose traction when accelerating and the
ve hicle can then skid
R ifth ere is poor visibility
F
F unction of t unction of t he limit
he limiter
er
The limiter restricts the speed of theve hicle. To
adjust tothe set speed quickl y,the limiter applies
th e brakes automaticall y.
Yo u can limit the speed as follo ws:
R Variable: for a short-term or medium-term
re striction of the highest permissible speed,
e.g. in built-up areas
R Perm anent: for a long-term restriction of the
highest permissible speed, e.g. in winter tyre
mode Driving and parking
157 157

Ov
Ov
er
ervie
vie w of t
w of t he ins
he ins tr
trument clust
ument clust er
er Inst
rument cluster (e xample)
1 Speedome ter
2 Display
3 Rev counter
4 Coolant temp erature display
5 Fuel le vel
Speedom et
Speedom eter
er
In vehicles with Active Distance Assist DISTRONIC,
th ere are illuminated segments on the speedome-
te r dial.
These segments show you what speed range is
av ailable:
R Variable limi ter activated (/ page 158)
The segments light up from the start of the
scale tothe selected limit speed.
R Active Distance Assist DISTRONIC switched on
(/ page 161)
One or two segments light up in the sa ved
speed range.
R Active Distance Assist DISTRONIC de tects a
ve hicle in front.
The segments light up from the speed of the
ve hicle in front up tothe sa ved speed.
Yo u can show the speed as a digital speedome ter
on the display as well.
If yo uch ange your vehicle's wheel size, check its
assignment tothe wheel size group (/ page 260).
If th e assignment changes without recoding the
cont rol units in theve hicle, the speedome ter will
not display the speed accuratel y.The cur rent vehi-
cle speed may then be higher than the speed
shown bythe speedome ter. Driving and driving
saf ety systems may then be operationally impaired
or may de tect a malfunction and switch them-
sel ves o..
In some countries, an audible signal will sound
and/or a message will appear on the display when th
eve hicle reaches the maximum speed permitted
by law, e.g. at 120 km/h.
R
R e
ev count
v count er
er
* NO
NOTE
TEEngine damage due tomaximum
engine speed being exceeded If
th e maximum permissible engine speed is
ex ceeded, the engine may be damaged. #
Avoid driving in there d speed range
(danger zone). Outside t
Outside t
em
emper
per atur
atur e display
e display
Yo u should pay special attention toroad conditions
when temp eratures are around freezing point.
The outside temp erature is shown on the inst ru-
ment cluster display (/ page 183).
Changes in the outside temp erature will be dis-
pla yed aTer a short dela y.
Coolant t
Coolant t em
emper
per atur
atur e display
e display &
W
WARNING
ARNING Risk of burns when opening the
bonnet
If yo u open the bonnet in theev ent of an over-
heated engine or /re in the engine compart-
ment, thefo llowing situations may occur:
R You may come into contact with hot gases.
R You may come into contact with other
escaping hot operating 0uids. #
Before opening the bonnet, allow the
engine tocool down. #
Intheev ent of a /re in the engine com-
partment, keep the bonnet closed and
call the /re service. The coolant
temp erature display is located within
th e inst rument cluster's rev counter.
During normal driving and if the coolant le vel is
cor rect, the display is permitted torise to120°C. Ov
Ov
er
ervie
vie w and oper
w and oper ation of t
ation of the on-boar
he on-boar d com-
d com-
put
put er
er &
W
WARNING
ARNING Risk of distraction due toinfor-
mation systems and communications
equipment
If yo u operate information systems and com-
munications equipment integ rated in theve hi-
cle when driving, you could be distracted from Instrument cluster and on-board computer
181 181

Depending on
theve hicle equipment, you can call
up thefo llowing menus:
R Trip menu (/ page 184)
R Navi menu (navigation inst ructions)
(/ page 185)
R Radio menu (/ page 187)
R Media menu (/ page 187)
R Telephone menu (/page 188)
R Assistance graphic menu (/page 184)
R Service menu (/ page 184)
R Settings menu (/ page 189) Menus and submenus
Menus and submenus
Ser
Ser
vice menu
vice menu #
Press theò button tocall up the list of
menus. #
Use the: or9 button toselect the
Service menu. #
Press thea button tocon/rm.
Yo u ha vethefo llowing options in the Service
menu:
R Calling up display messages in the message
memory (/ page 281).
R Checking the tyre pressure electronically or
re starting the tyre pressure monitoring system
(/ page 258).
R Checking the engine oil le vel electronically
(/ page 184).
R Calling up the service due date
R Displaying theAd Blue ®
/ll le vel (in BlueTEC ®
ve hicles). Assist
Assist
ant displa
ant displa y menu
y menu #
Press theò button tocall up the list of
menus. #
With th e: or9 button, select the
Assistance graphic menu. #
Press thea button tocon/rm.
The status of thefo llowing driving or driving
saf ety systems can be displa yed:
R Rear wind owwiper (/ page 118)
R Active Brake Assist (/ page 155)
R ATTENTION ASSIST (/ page 173)
R DSR (/ page 159)
R Tra1c Sign Assist (/ page 174)
R Active Distance Assist DISTRONIC
(/ page 162)
R Lane Keeping Assist (/ page 176)
R Blind Spot Assist (/ page 175) #
Press the: or9 button toswitch
between the assistant display and theev alua-
tion of ATTENTION ASSIST (/ page 173).
The evaluation of ATTENTION ASSIST sh ows
th e length of journey since the last break and
th e calculated attention le vel. Calling up display
Calling up display
s on t
s on t heTr
he Trip menu
ip menu Displa
Displa
ying t
ying the r
he rang
ange and curr
e and curr ent fuel consump
ent fuel consump tion
tion 1
Appr oximate range
2 Current fuel consum ption
3 Recuperation display #
Press theò button tocall up the list of
menus. #
Use the: or9 button toselect the
Trip menu. #
Press thea button. #
With th e: or9 button, select range
and consum ption.
If th ere is only a small amount of fuel leT in the
fuel tank, the display will show a vehicle being refu-
elled Ï instead of the appr oximate range 1. 184
184
Instrument cluster and on-board computer

In
these or similar operating conditions, ha vethe
air /lter, engine oil and oil /lter, forex ample,
re placed more frequentl y.
If th eve hicle is subjected toincreased loads, the
tyres must be checked more frequentl y.Yo u can
obtain fur ther information at a quali/ed specialist
wo rkshop. N
Non-oper
on-oper ational times wit
ational times wit h t
h the batt
he batt er
ery disconnec-
y disconnec-
t
t ed
ed The AS
SYST PLUS service inter val display can cal-
culate the service due date only when the battery
is connected. #
Display and no tedown the service due date on
th e inst rument cluster before disconnecting
th e battery (/ page 223). Engine com
Engine com
par
par tment
tment Opening and closing t
Opening and closing t
he bonnet
he bonnet &
W
WARNING
ARNING Risk of accident due todriving
with the bonnet unloc ked
The bonnet may open and blo ckyour vie w. #
Neverre lease the bonnet when driving. #
Before every trip, ensure that the engine
bonnet is loc ked. &
W
WARNING
ARNING Risk of accident and injury
when opening and closing the bonnet
The bonnet may suddenly drop into the end
position.
There is a risk of injury for an yone in the
engine bonnet's range of mo vement. #
Do not open or close the bonnet if there
is a person in the bonnet's range of
mo vement. &
W WARNING
ARNING Risk of injury from touching
components under voltage
The ignition system and the fuel injection sys-
te m wo rkunder high voltage. You could receive
an elect ric shoc k. #
Neverto uch components of the ignition
system or the fuel injection system when
th e ignition is switched on. The
following are examples of live components:
R Ignition coils
R Spark plug connectors
R Injectors &
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 tobonnet or windscreen
wipers when opening the bonnet If
th e windscreen wipers ha vebeen folded
back from the windscreen when the bonnet is
opened, the windscreen wipers or the bonnet
may be damaged. #
Ensure that the windscreen wipers ha ve
not been folded back from the wind-
screen. Opening t
Opening t
he bonnet
he bonnet #
Pull the handle 1torelease the bonnet. 224
224
Maintenance and care

#
Siphon o. any excess engine oil that has been
added. Todo so, consult a quali/ed specialist
wo rkshop.
For engine oil level turn on ignition #
Switch the ignition on tocheck the engine oil
le ve l.
Engine oil level System inoperative
The /ll le vel sensor is defective or not plugged in. #
Have the oil le vel display checked at a quali/ed
specialist workshop.
Engine oil level System currently unavail. #
Close the bonnet.
Chec Chec king t
king t he engine oil lev
he engine oil lev el wit
el with t
h the on-board
he on-board
com
com put
puter (engine wit
er (engine wit h oil dips
h oil dipstictick)
k)
R R eq eq uir
uir ements:
ements:
R The vehicle is le vel during the measuring proc-
ess.
R The engine is switched o. at normal operating
te mp erature.
R Awa iting period of /ve minutes is obser ved.
R The ignition is switched on.
To check the engine oil le vel with the on-board
computer, the engine must ha vea /ll le vel sensor.
If not, the engine oil le vel can be checked only with
th e oil dipstick (/ page 226).
On-board computer: 4 Service 5
Engine oil level
The f
The f ollo
ollowing messag
wing messag es ma
es may appear on t
y appear on t he display
he display
of t
of t he on-boar
he on-boar d com
d comput
puter:
er:
Engine oil level OK #
Do not top up oil.
Engine oil level Add 1,0 l #
Addth e speci/ed quantity of oil
(/ page 227). #
Repeat the engine oil measurement aTer a few
minutes.
Engine oil level Reduce oil level
The oil le vel is too high. #
Siphon o. any excess engine oil that has been
added. Todo so, consult a quali/ed specialist
wo rkshop.
For engine oil level turn on ignition #
Switch on the ignition.
Waiting period for engine oil level not observed #
Ifth e engine is at normal operating temp era-
ture, repeat the engine oil measurement aTer
appr oximately /ve minutes. #
Ifth e engine is not at normal operating tem-
perature, repeat the engine oil measurement
aTer appr oximately 30 minutes.
Engine oil level Not with the engine running #
Switch o. the engine and, when it is at normal
operating temp erature, wait appr oximately
/ve minutes before measuring the engine oil
le ve l.
Engine oil level System inoperative
The engine oil le vel measurement is malfunction-
ing. #
Check the oil le vel using the oil dipstick
(/ page 226). #
Have the oil le vel display checked at a quali/ed
specialist workshop.
Chec Chec king t
king t he engine oil lev
he engine oil lev el wit
el with an oil dips
h an oil dips tick
tick &
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. The engine oil becomes dirty during operation,
loses quality and also gradually loses volume.
Check the oil le velre gular lyand top up the oil or
ha ve itch anged if necessar y.
Re gular lych eck the 0uid le vel and the major
assemblies for leaks. If you de tect 0uid loss, for
ex ample, oil drops on theve hicle parking space,
consult a quali/ed specialist workshop as quickly
as possible. #
Only check the oil le vel when the engine is at
normal operating temp erature. 226
226
Maintenance and care