2021 MERCEDES-BENZ V-CLASS MPV check engine

Note
s onthe instrument clus ter and on-
board co mputer &
WARNING Risk of accident due toan
instrument clus ter malfunction
If th e instrument clus ter has failed or mal‐
functioned, you may not notice restrictions to
saf ety-re leva nt sy stem functions.
The operating saf ety of your vehicle may be
impaired. #
Drive on carefull y. #
Have theve hicle checked immediately
at a qualified specialist workshop. If
yo u are uncer tain rega rding the operational
saf ety of your vehicle, park theve hicle safely as
soon as possible. Inform a qualified specialist
wo rkshop.
The on-board computer will show only messages
and warnings from cer tain sy stems on the dis‐
pla y.Yo u should therefore make sure your vehicle
is operating safely at all times.
Yo u can find an overview of the indicator and
wa rning lamps on the instrument clus ter in "At a
gl ance". Overview of
the instrument clus ter Instrument clus
ter (e xamp le)
1 Speedome ter
2 Multifunction display
3 Rev counter
4 Coolant temp erature display
5 Fuel le vel
Speedome ter
In vehicles with Active Dis tance Assi st
DISTRONIC, there are illuminated segments on
th e speedome ter dial. These segments show
you what speed range is
av ailable:
R Variable limiter activated (/ page159)
The segments light up from thest art of the
scale tothe selected limit speed.
R Active Dis tance Assi stDISTRONIC switched
on (/ page 162)
One or two segments light up in the sa ved
speed range.
R Active Dis tance Assi stDISTRONIC 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 258). If the assignment changes with‐
out recoding the cont rol units in theve hicle, the
speedome ter will not display the speed accu‐
ra tely. The cur rent vehicle speed may then be
higher than the speed shown bythe speedome‐
te r.Driving and driving sa fety sy stems may then
be operationally impaired or may de tect a mal‐
function and switch themselves off.
In some count ries, an audible signal will sound
and/or a message will appear on the display
when theve hicle reaches the maximum speed
permitted bylaw, e.g. at 120 km/h.
Re v counter
* NO
TEEngine damage due tomaximum
engine speed being exceeded If
th e maximum permissible engine speed is
exc eeded, the engine may be damaged. #
Avoid driving in there d speed range
(danger zone). Outside
temperature display
Yo u should pay special attention toroad condi‐
tions when temp eratures are around freezing
point.
The outside temp erature is displa yed on the mul‐
tifunction display (/ page182).
Changes in the outside temp erature will be dis‐
pla yed af ter a short dela y. 18 0
Instrument clus ter and on-board computer

Setting
the instrument lighting The displa
yson the instrument clus ter are illumi‐
nated during the da y.A dimming function is not
possible in da ylight.
The light sensor on the instrument clus ter auto‐
matically controls the brightness of the display
lighting.
When the light has been switched on, the bright‐
ness contro l is influenced bythe ambient light.
Yo u can then adjust the brightness of the instru‐
ment lighting and the display lighting with con‐
troller 1aswell. #
Turn controller 1up or down. Overview of menus on the on-board com‐
puter
Use the00E2 steering-wheel button tocall up the
list of menus and select a menu.
Yo u can find ope rating information in "O verview
and operation of the on-board computer"
(/ page 181).
Depending on theve hicle equipment, you can call
up thefo llowing menus:
R Trip menu (/ page184)
R Navi menu (navigation instructions)
(/ page 185)
R Radio menu (/ page 186)
R Media menu (/ page186)
R Telepho nemenu (/ page 188)
R Assistance graphic menu (/page 183)
R Service menu (/ page183)
R Settings menu (/ page189) Menus and submenus
Service menu
#
Press the00E2 button tocall up the list of
menus. #
With th e0064 or0063 button, select the
Service menu. #
Press the0076 button toconfirm.
Yo u ha vethefo llowing options in the Service
menu:
R Calling up display messages in the message
memory (/ page279).
R Che cking the tyre pressure electronically or
re starting the tyre pressure monitoring sys‐
te m (/ page 255).
R Checking the engine oil le vel elect ronically
(/ page 183).
R Calling up the service due date
R Displaying theAd Blue ®
fill le vel (in BlueTEC ®
ve hicles). Assistant display menu
#
Press the00E2 button tocall up the list of
menus. #
With th e0064 or0063 button, select the
Assistance graphic menu. #
Press the0076 button toconfirm.
The status of thefo llowing driving or driving
saf ety sy stems can be displa yed:
R Rear wind owwiper (/ page116)
R Active Brake Assi st (/ page 156)
R ATTENTION ASSIST (/ page172)
R DSR (/ page 160)
R Traf fic Sign Assi st (/ page 173)
R Active Dis tance Assi stDISTRONIC
(/ page 163) Instrument clus
ter and on-board computer 18 3

R
when the engine is of ten le ftidling for long
periods
R operation in particula rly dusty conditions
and/or if air-reci rculation mode is frequent ly
used
In these or similar operating conditions, ha vethe
air filter, engine oil and oil filter, forex ample,
re placed more frequentl y.
If th eve hicle is subjected toinc reased loads, the
tyres mu stbe checked more frequentl y.Yo u can
obtain fur ther information at a qualified specialist
wo rkshop. No
n-operational times with the bat tery dis‐
connected The ASS
YST PLUS service inter val display can
calculate the service due date only when the bat‐
te ry is connecte d. #
Display and no tedown the service due date
on the instrument clus ter before disconnect‐
ing the battery (/ page 220). Engine compartment
Opening and closing
the bonnet &
WARNING Risk of accident due todriving
with the bonn etunlo cked
The bonn etmay open and block your vie w. #
Neverre lease the bonn etwhen driving. #
Before every trip, ensure that the engine
bonn etis loc ked. &
WARNING Risk of accident and inju ry
when opening and closing the bonn et
The bonnet may suddenly drop into the end
position.
There is a risk of injury for an yone in the
engine bonn et's range of mo vement. #
Do not open or close the bonn etifth ere
is a person in the bonn et's range of
mo vement. &
WARNING Risk of injury fromtouching
components under voltage
The ignition sy stem and the fuel injection sys‐
te m wo rkunder high voltage. You could
re ceive an electric shoc k. #
Neverto uch components of the ignition
sy stem or the fuel injection sy stem
when the ignition is switched on. The
following are examples of live components:
R ignition coils
R spark plug connec tors
R injectors &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component pa rts in the engine com‐
partment can be very hot, e.g. the engine, the
cooler and pa rts of theex haust sy stem. #
Allow the engine tocool down and only
to uch component parts desc ribed in the
fo llowing. *
NO
TEDama getobonn etor windscreen
wipers when opening the bonn et If
th e windscreen wipers ha vebeen folded
back from the windscreen when the bonn etis
opened, the windscreen wipers or the bonn et
may be dama ged. #
Ensure that the windscreen wipers ha ve
not been folded back from the wind‐
screen. Opening
the bonnet #
Pull handle 1torelease the bonn et. Maintenance and care
221

#
Reach into thega p, push le ver2 ofthe bon‐
net catch tothe left and lift the bonn et.
When the bonn ethas opened around 40 cm,
it will be automatically opened and held by
th ega s pressure spring dampers.
Closing the bonnet &
WARNING Risk offire due toflammable
materials in the engine compartment or
on theex haust sy stem
Flammable materials may ignite. #
Ensure that there are no flammable
ex tern al materials in the engine com‐
partment or on theex haust sy stem
af te r maintenance workhas been car‐
ri ed out. *
NO
TEDama getothe bonn etdue to
pressing it closed manually Pushing
the bonn etclosed wi thyour hands
could damage it. #
Toclose the bonn et, let it drop from the
specified height. #
Lowe rth e bonn etand let it fall from a height
of appr oximately 30 cm, applying a little force
as you let it go. #
Ifth e bonn etremains slightly open, open it
again and let it fall, applying slightly more
fo rc e as you let it go, until it engages. Engine oil
Checking engine oil le
vel with on-board com‐
puter (engine without oil dipst ick)
Re quirements:
R The engine oil le vel is de term ined during driv‐
ing.
R The engine is at normal operating temp era‐
ture.
R The vehicle is le vel during the measuring
process.
R The bonn etis not open.
Depending on the driving profile, the oil le vel can
be displa yed only af ter a driving time of up to
30 minutes and only when the ignition is
switched on.
On-board computer:
4 Service 5
Engine oil level
One of thefo llowing messa ges appears on
th e display of the on-boa rdcompu ter:
Engine oil level Measurement in progress... #
Measurement of the oil le vel not yet possible.
Re peat thequ ery af ter driving for a maximum
of 30 minutes.
Engine oil level OK
The bar for displaying the oil le vel on the display
is green and is between "min" and "max". #
Do not top up oil. The engine oil le vel is cor‐
re ct.
Engine oil level Warm up engine #
Warm upthe engine tooperating temp era‐
ture.
Engine oil level Correct measurement only if vehi-
cle is on level ground #
Park theve hicle on a le vel sur face.
Engine oil level Add 1,0 l
The bar for displaying the oil le vel on the display
is orange and is below "min".
The oil le vel is too lo w. #
Add 1 l of engine oil (/ page 224).
Engine oil level Reduce oil level
The bar for displaying the oil le vel on the display
is orange and is abo ve"max".
The oil le vel is too high. 222
Maintenance and care

#
Siphon off any excess engine oil that has
been added. Todo so, consult a qualified spe‐
cialist workshop.
For engine oil level turn on ignition #
Switch the ignition on tocheck the engine oil
le ve l.
Engine oil level System inoperative
The fill le vel sensor is defective or not plugged in. #
Have the oil le vel display checked at a quali‐
fi ed specialist workshop.
Engine oil level System currently unavail. #
Close the bonn et.
Checking engine oil le vel with on-board com‐
puter (engine with oil dipst ick)
Re quirements:
R The vehicle is le vel during the measuring
process.
R The engine is switched off at normal operat‐
ingtemp erature.
R Awa iting period of five 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 veafill le vel sen‐
sor. If not, the engine oil le vel can be checked
only with the oil dipstick (/ page 223).
On-board computer: 4 Service 5
Engine oil level
The following messa ges may appear on the
di splay of the on-boa rdcompu ter:
Engine oil level OK #
Do not top up oil.
Engine oil level Add 1,0 l #
Addth e specified quantity of oil
(/ page 224). #
Repeat the engine oil measurement af ter a
fe w minutes.
Engine oil level Reduce oil level
The oil le vel is too high. #
Siphon off any excess engine oil that has
been added. Todo so, consult a qualified spe‐
cialist workshop.
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 af ter
appr oximately five minutes. #
Ifth e engine is not at normal operating tem‐
perature, repeat the engine oil measurement
af te r appro ximately 30 minutes.
Engine oil level Not with the engine running #
Switch off the engine and, when it is at nor‐
mal operating temp erature, wait appr ox‐
imately five minutes before measu ring the
engine oil le vel.
Engine oil level System inoperative
The engine oil le vel measurement is malfunction‐
ing. #
Check the oil le vel with the oil dipstick
(/ page 223). #
Have the oil le vel display checked at a quali‐
fi ed specialist workshop.
Checking the engine oil le vel with an oil dip‐
st ick &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component pa rts in the engine com‐
partment can be very hot, e.g. the engine, the
cooler and pa rts of theex haust sy stem. #
Allow the engine tocool down and only
to uch component parts desc ribed in the
fo llowing. The engine oil becomes dirty during operation,
loses
quality and also gradually loses volume.
Check the oil le velre gularly and top up the oil or
ha ve itch anged if necessar y.
Re gular lych eck thefluid le vel and the major
assemblies for leaks . Ifyou de tect fluid loss, for
ex ample, oil drops on theve hicle parking space,
consult a qualified specialist workshop as quickly
as possible. #
Only check the oil le vel when the engine is at
normal operating temp erature. Maintenance and care
223

Example: engine oil
filler opening #
Obser vethe information rega rding appr oved
engine oil under "Operating fluids and capaci‐
ties" (/ page273). #
Unscr ewand remo vethe cap 1. #
Top up engine oil. #
Fitthe cap 1onthefiller opening and
tigh ten.
When doing so, make su rethat the cap
engages cor rectly. #
If present, check the oil le vel using the oil dip‐
st ick (/ page 223). #
Inthe case of vehicles without an oil dipstic k,
ch eck the oil le vel with the on-board com‐
puter af terth e next journey (/ page 222).
It is necessary torunth e engine for an extended
pe riod af ter each oil top up tocor rectly de tect
th e oil le vel. Fill le velch anges during oil top ups
may not be immediately visible. Depending on the
driving profile, the new oil le vel can only be dis‐
pla yed af ter a driving time of up to60 minutes.
If necessa ry, only top up thequ antity of oil shown
in the instrument clus ter display and check the
oil le vel again af terth e next journe y. Checking/topping up
the coolant &
WARNING Risk offire ‑ and inju ryfrom
antifreeze
If antifreeze comes into contact with hot com‐
ponent parts in the engine compartment, it
may ignite. #
Allow the engine tocool down before
yo uto p up the antifreeze. #
Make sure that no antifreeze spills out
next tothefiller opening. #
Thoroughly clean the antifreeze from
component parts before starting the
ve hicle. &
WARNING Risk of scalding from hot
coolant
If yo u open the cap, you could be scalded. #
Letthe mo tor cool down before opening
th e cap. #
When opening the cap, wear pr otective
gl ove s and saf etygl asses. #
Open the cap slowly torelease pres‐
sure. Only
check and top up the coolant le vel when the
ve hicle is stationary on a le vel sur face and the
engine has cooled down. The coolant temp era‐
ture must be below 50°C. &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component pa rts in the engine com‐
partment can be very hot, e.g. the engine, the
cooler and pa rts of theex haust sy stem. #
Allow the engine tocool down and only
to uch component parts desc ribed in the
fo llowing. Coolant con
tains glyc ol and is therefore poison‐
ous. #
Obser vethe information under "Operating flu‐
ids and capacities" (/ page274).
* NO
TEPaint wo rkdamage due tocoolant If coolant
gets on painted sur faces, the paint‐
wo rkcan be damaged. #
Add coolant carefully. #
Remo vespilled coolant. Re
gular lych eck the engine cooling sy stem and
th e heating sy stem for leaks . Ifthere is a loss of
coolant, ha vethe cause de term ined and rectified
in a qualified specialist workshop without dela y. Maintenance and care
225

Example: cap and coolant
expansion reser voir
Checking the coolant le vel #
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
To pping up the coolant
Only use coolant appr ovedfo r Mercedes-Benz to
avo id damaging the engine cooling sy stem. #
Refe rto the information on coolant
(/ page 274). #
Refill th e coolant up tothe mar ker bar 3in
th efiller opening of the coolant expansion
re ser voir2. #
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 cont rol panel of
th e climate cont rol. #
After about five minutes, switch off the
engine again and allow it tocool down. #
Che ckthe coolant le vel again and top up the
coolant if necessar y. Fi
lling up the windscreen washer sy stem &
WARNING Risk offire and injury from
windscreen washer concentrate
Wi ndscreen washer concentrate is highly
fl ammable. #
Avoid fire , naked flames, smoking and
th e creation of spar kswhen using wind‐
screen washer concentrate. &
WARNING Risk of burn s from hot com‐
ponent parts in the engine compartment
Cer tain component pa rts in the engine com‐
partment can be very hot, e.g. the engine, the
cooler and pa rts of theex haust sy stem. #
Allow the engine tocool down and only
to uch component parts desc ribed in the
fo llowing. *
NO
TEDama getotheex terior lighting
due tounsuitable windsc reen washer
fl uid Uns
uitable windsc reen washer fluids may
damage the plastic sur face of theex terior
lighting. #
Only use windscreen washer fluids that
are also suitable for use on plast ic sur‐
fa ces, e.g. MB SummerFit or MB Winter‐
Fit. To
pping up the washer fluid Wa
sher fluid reser voir (e xamp le) #
Obser vethe no tes on windshield cleaning
agents (/ page275). 226
Maintenance and care

Obser
vethefo llowing no tes:
R Recharge the battery more frequently in the
fo llowing cases:
- You predominantly drive short dis tances.
- You predominantly drive at low outside
te mp eratures.
- You lea vetheve hicle par kedfo r a lengt hy
period.
In order forth e batteries toachie vetheir max‐
imum possible service life, they must alw ays
be suf ficiently charge d.
R Consult a qualified specialist workshop if you
wish tolea veyour vehicle par ked up for a
long period of time.
R When you park theve hicle, remo vetheke y if
yo u do not require any elect rical consumers.
The vehicle will then use very little energy,
th us conserving bat tery 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 the jump-s tart con‐
nection point in the engine compartment
(/ page 237).
Installation locations
Yo ur vehicle may be equipped with thefo llowing
two batteries located in the seat base of the
ri ght-hand front seat, depending on the equip‐
ment version:
R Starter battery
R Suppo rtbattery St
arting assistance and charging the12 V
battery &
WARNING Risk ofexplosion from a fro‐
zen battery
A dischar ged battery may freeze at temp era‐
tures slightly abo veor below freezing point.
During starting assis tance or battery charg‐
ing, battery gas can be released. #
Always allow a battery tothaw before
ch arging it or per form ing starting assis‐
ta nce. If
th ewa rning/indicator lamps do not light up in
th e instrument clus ter at temp eratures around or
below freezing, it is highly probable that the dis‐
ch arge d battery has frozen. In
this case, obser vethefo llowing points:
R do not give theve hicle starting assis tance or
ch arge the battery
R the service life of a battery that has been
th awe d may be reduced drastically
R thest arting behaviour may de teriorate, par‐
ticularly at low temp eratures
R it is recommended that you ha veath awed
battery checked at a qualified specialist work‐
shop &
WARNING Risk ofexplosion during
ch arging process and starting assis tance
During thech arging process and starting
assis tance, the battery may release an explo‐
sive gas mixture. #
Avoid fire , naked flames, creating
spar ksand smoking. #
Make sure there is suf ficient ventilation. #
Do not lean over a batter y. &
WARNING Danger of chemical burns
from the battery acid
Battery acid is caustic. #
Avoid contact with the skin, eyes or
clo thing. #
Do not lean overth e batter y. #
Do not inhale battery gases. #
Keep children away from the batter y. #
Immedia tely rinse battery acid off thor‐
oughly with plenty of clean water and
seek medical attention immediately. St
arting assistance
* NO
TEDama gecaused bynume rous or
ex tended attempts tostart the engine Nume
rous or extended attempts tostart the
engine may damage the catalytic con verter
due tonon-combu sted fuel. #
Avoid numerous and extended attem pts
to start the engine. Do not use a
rapid charging device tostart the
ve hicle. If your vehicle's battery is dischar ged,
th e engine can be jump-s tarted from ano ther
ve hicle or from a donor battery using jump leads.
Fo rth is purpose, theve hicle has a jump-s tart
connection point in the engine compartment. Breakdown assis
tance 237