engine MERCEDES-BENZ V-CLASS 2021 Service Manual

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

#
Reach into thega p, push le ver2 ofthe bon-
net catch tothe leT and liT the bonnet.
When the bonnet has opened around 40 cm, it
will be automatically opened and held bythe
ga s pressure spring dampers.
Closing t
Closing t he bonnet
he bonn et &
W WARNI NG
ARNI NGRisk of /re due to0ammable
materials in the engine compartment or on
th eex haust system
Flammable materials may ignite. #
Ensure that there are no 0ammable
ex tern al materials in the engine compart-
ment or on theex haust system aTer
maintenance workhas been car ried out. *
N NOOTE
TE Damage tothe bonnet due topress-
ing it closed manually Pushing
the bonnet closed with your hands
could damage it. #
Toclose the bonnet, let it drop from the
speci/ed height. #
Lowe rth e bonnet and let it fall from a height of
appr oximately 30 cm, applying a little forc e as
yo u let it go. #
Ifth e bonnet remains slightly open, open it
again and let it fall, applying slightly more force
as you let it go, until it engages. Engine oil
Engine oil
Chec
Chec
king engine oil lev
king engine oil lev el wit
el with on-boar
h on-boar d com
d comput
puter
er
(engine wit
(engine wit hout oil dips
hout oil dipstic tick)
k)
R
R eq
eq uir
uir ements:
ements:
R The engine oil le vel is de term ined during driv-
ing.
R The engine is at normal operating temp erature.
R The vehicle is le vel during the measuring proc-
ess.
R The bonnet is not open.
Depending on the driving pro/le, the oil le vel can
be displa yed only aTer 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 t One of t he f
he follo
ollowing messag
wing messag es appear
es appears on t
s on the dis-
he dis-
pla
pla y of t
y of t he on-boar
he on-boar d com
d comput
puter:
er:
Engine oil level Measurement in progress... #
Measurement of the oil le vel not yetpossible.
Re peat thequ ery aTer driving for a maximum
of 30 minutes.
Engine oil level OK
The bar for displaying the oil le vel on the display is
gr een 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 erature.
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 227).
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. Maintenance and care
225 225

#
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

Oil dipstick and engine oil /ller opening (e
xample:
petrol engine) Oil dipstick and engine oil /ller opening (e
xample:
diesel engine) #
Pull oil dipstick 1out of the dipstick tube. #
Wipe the oil dipstick 1using a lint-fre e cloth. #
Insert the oil dipstick 1back into the guide
tube as far as it will go and pull it out again.
If th e le vel is between MIN mark 3and MAX
mark 2,the oil le vel is adequate. #
Ifth e oil le vel has dropped toor below mini-
mum mark 3, open cap 4and top up the
engine oil (/ page 227).
The di.erence in quantity between mar ks2 and
3 depends on the engine:
R Diesel engines, about 2 l
R Petrol engines about 1.5 litres T
T
opping up t
opping up t he engine oil
he engine oil &
W
WARNING
ARNING Risk of /re and injury from
engine oil
If engine oil comes into contact with hot com-
ponent parts in the engine compartment, it
may ignite. #
Make sure that no engine oil is spilled
next tothe /ller opening. #
Allow the engine tocool o. and thor-
oughly clean the engine oil from compo-
nent parts before starting theve hicle. &
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 caused bytopping up too
much engine oil To
o much engine oil can damage the engine or
th e catalytic con verter. #
Have excess engine oil remo ved at a
qu ali/ed specialist workshop. *
N
NOOTE
TE Engine damage due touse of addi-
tives in the engine oil The use of additional additives in
the engine oil
can damage the engine. #
Do not use any additional additives in the
engine oil. +
ENVIR
ENVIR
ONMENT
ONMENT AL NO
AL NOTE
TE Environmental
damage due tohydraulic 0uid le vel spill-
ages while topping up If 0uid spills onto soil,
the environment will be
damaged. #
Make sure that no 0uid spills while top-
ping up. Maintenance and care
227
227

Example: engine oil /ller opening
#
Obser vethe information rega rding appro ved
engine oil under "Operating 0uids and capaci-
ties" (/ page 275). #
Unscr ewand remo vethe cap 1. #
Top up engine oil. #
Fitth e cap 1onthe /ller opening and
tighten.
When doing so, make sure that the cap
engages cor rectl y. #
If present, check the oil le vel using the oil dip-
stick (/ page 226). #
Inthe case of vehicles without an oil dipstic k,
ch eck the oil le vel with the on-board computer
aTer the next journey (/ page 225).
It is necessary torunth e engine for an extended
period aTer each oil top up tocor rectly de tect the
oil le vel.Fill le velch anges during oil top ups may
not be immediately visible. Depending on the driv-
ing pro/le, the new oil le vel can only be displa yed
aTer a driving time of up to60 minutes.
If necessar y,only top up thequ antity of oil shown
in the inst rument cluster display and check the oil
le ve l again aTer the next journe y. Chec Chec
king/t
king/t opping up t
opping up t he coolant
he coolant &
W
WARNING
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 the engine tocool down before you
to 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. &
W WARNING
ARNING Risk of scalding from hot cool-
ant
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
glo ves and saf ety glasses. #
Open the cap slo wlytorelease pressure. Check and
top up the coolant only when theve hi-
cle is stationary and in a horizontal position and
th e engine has cooled down. The coolant temp era-
ture must be below 50°C. &
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. Coolant contains gl
ycol and is therefore poison-
ous. #
Obser vethe information under "Operating 0u-
ids and capacities" (/ page 277).
* NO
NOTE
TEPaintwork damage due tocoolant If coolant
gets on painted sur faces, the paint-
wo rkcan be damaged. #
Add coolant carefull y. #
Remo vespilled coolant. Re
gular lych eck the engine cooling system and the
heating system for leaks. If there is a loss of cool-
ant, ha vethe cause de term ined and recti/ed in a
qu ali/ed specialist workshop without dela y. 228
228
Maintenance and care

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

#
Do not clean thefo llowing components
with the high-pressure cleaner:
R electrical components
R plug connectors
R reve rsing camera
R drivetra in
R seals
R hoses *
N NOOTE TE Damage caused bythe use of a
high-pressure cleaner in theve hicle inte-
ri or The pressurised
water created bythe high-
pressure cleaner and the associated spr ay
could cause conside rable damage totheve hi-
cle. #
Never use a high-pressure cleaner in the
ve hicle interior. *
N
NOOTE
TE Damage tothe emissions control
system due toimproper cleaning Cleaning
the system when it is warm orthe
direct e.ect of water jets in theex haust pipe
can damage the emissions control system. #
Clean the system only when it is cold. #
Do not direct thewa ter jet into the
ex haust pipe. W
W
ashing t
ashing t he engine
he engine
* NO
NOTE
TE Damage and malfunctions due to
wa shing the engine #
Toprev ent damage and malfunctions of
th e engine, obser vethefo llowing points:
R when using high-pressure or steam
cleaners, do not point thewa ter jet
directly at electrical components and
th e end of electric cables.
R make sure that no water enters the
ve nt and ventilation openings.
R use prese rvative agents in the engine
aTer washing the engine.
R protect the belt drive from preser va-
tion agents. W W
ashing t
ashing t he v
he vehicle b
ehicle b y hand
y hand Obser
vethe legal requ irements, e.g. in a number
of countries, washing byhand is only permitted in
special lydesignated wash ba ys. #
Washtheve hicle with luk ewarmwater and a
soT car sponge. When doing so, do not expose
th eve hicle todirect sunlight. #
Use a mild cleaning agent, e.g. a Mercedes-
Benz appr oved car shampoo. #
Carefully spr aytheve hicle with water and dry
o. with a leather clo th. Do not point thewa ter
jet direct lyinto the air inlet grille.
When operating theve hicle in winter, remo veall
traces of road salt deposits carefully and as soon
as possible. N No
ot
tes on car
es on car e of paint and matt
e of paint and matt /nish
/nish *
N
NOOTE
TE Paintwork damage and cor rosion
due toinadequate care Fa
ilure toprom ptly and thoroughly remo vedirt
from bird droppings or other residue could
re sult in paintwork damage and cor rosion at a
later date. #
Clean dirt o. paint and matt /nish thor-
oughly and as soon as possible. Obser
vethe no tes on cleaning and care toavo id
paintwork damage.
P P aint
aint
R Insect remains: soak with insect remo ver and
th en wash o..
R Bird droppings: soak with water and then wash
o..
R Tree resin, oils, fuels and greases: remo veby
ru bbing gently with a clo thsoaked in petroleum
et her or lighter 0uid.
R Coolant and brake 0uid: remo vewith a moist
clo thand clean water.
R Tar stains: use tarre mo ver.
R Wax: use silicone remo ver.
R Do not a1x stic kers, /lms or similar.
R Remo vedirt as soon as possible.
Matt Matt /nish /nish
R Only use care products appr oved for
Mercedes-Benz.
R Do not polish theve hicle and light-alloy
wheels. Main
tenance and ca re
231
231

Obser
vethefo llowing no tes:
R Recharge the battery more frequently in the
fo llowing cases:
- You predominantly drive short distances.
- 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 maxi-
mum possible service life, they must alw ays be
su1ciently charge d.
R Consult a quali/ed specialist workshop if you
wish tolea veyour vehicle par ked up for long
periods.
R When you park theve hicle, remo vetheke y if
yo u do not requ ire any electrical consumers.
The vehicle will then use very little energy, thus
conserving battery po wer.
R Ifyo ur vehicle requ ires jump-starting, or if you
wish toprov ide jump-starting assistance to
ano ther vehicle, only use the jump-start con-
nection point in the engine compartment
(/ page 240).
Inst
Inst allation locations
allation locations
Yo ur vehicle may be equipped with thefo llowing
two batteries located in the seat base of theright-
hand front seat, depending on the equipment ver-
sion:
R Starter battery
R Support battery S
S
t
tar
ar ting assist
ting assist ance and c
ance and c har
harging t
ging t he 12 V batt
he 12 V batt ery
ery &
W
WARNING
ARNING Risk ofexplosion from a frozen
battery
A dischar ged battery may freeze at temp era-
tures slightly abo veor below freezing point.
During starting assistance or battery charging,
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 inst rument cluster 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 batter y.
R The service life of a bat tery that has been
th awe d may be reduced drasticall y.
R The starting beh aviour may de teriorate, partic-
ular lyat low temp eratures.
R It is recommended that you ha veath awe d bat-
te ry checked at a quali/ed specialist workshop. &
W
WARNING
ARNING Risk ofexplosion due toexplo-
sive mixture of gases
An explosive mixture of gases can escape from
th e battery during charging and starting assis-
ta nce. #
Fire, naked 0ames, smoking and creating
spar ksmust be avoided. #
Make sure there is adequate ventilation. #
Do not stand overth e batter y. &
W
WARNI NG
ARNI NGDanger of chemical burns from
th e 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. #
Immediately rinse battery acid o. thor-
oughly with plenty of clean water and
seek medical attention immediatel y. S
S
t
tar
ar ting assist
ting assist ance
ance
* NO
NOTE
TEDamage caused bynumerous or
ex tended attem ptsto start the engine Numerous or
extended attem ptsto start the
engine may damage the catalytic con verter
due tonon-combusted 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, the
engine can be jump-star ted from ano ther vehicle
or from a donor battery using jump leads. Forth is
purpose, theve hicle has a jump-start connection
point in the engine compartment. 240
240
Breakdown assistance

When jump-starting, obser
vethefo llowing points:
R The battery is not accessible in all vehicles. If
th eot her vehicle's battery is not accessible,
starting assis tance is tobe pr ovided using a
donor battery or a starting assistance device.
R You may only jump-start theve hicle when the
engine and exhaust system are cold.
R Ifth e battery is frozen, do not start theve hicle.
Let the battery thaw /rst.
R Starting assis tance may only be pr ovided using
batteries with a nominal voltage of 12 V.
R Only use jump leads that ha vea su1cient
cross-section and insulated term inal clamps.
R Ifth e battery is fully dischar ged, attach the
donor battery for a few minutes before
attem pting tostart. This charge sth e dis-
ch arge d battery a little.
R Make sure that the two vehicles do not touch.
Jump leads and fur ther information rega rding start-
ing assistance can be obtained at any quali/ed
specialist workshop.
Ensure thefo llowing before connecting the jump
lead:
R The jump leads are not damaged.
R Parts of thete rm inal clamps which are not
insulated do not come into contact with other
me tal parts while the jump leads are connec-
te dto the batter y.
R The jump leads do not touch moving parts
when theve hicle is star ted, such as theV- belt
pulley or thefa n. #
Apply the parking brake. #
V
Vehicles wit
ehicles wit h aut
h automatic tr
omatic tr ansmission:
ansmission: shiTthe
transmission toposition j. #
V
Vehicles wit
ehicles wit h manual tr
h manual tr ansmission:
ansmission: shiTto
neutral. #
Switch o. all electrical consumers, e.g. audio
equipment, blo wer. #
Switch o. theve hicle and remo vethekey. #
Open the bonnet (/ page 224). Connecting and disconnecting t
Connecting and disconnecting t
he jum
he jump lead
p lead Example: jump-start connection point
#
Push contact pr otection co ver1 ofthe jump-
start connection point towa rdsth ere ar of the
ve hicle against the spring pressure as far as it
will go.
Po siti veterm inal 5ofthe jump-start connec-
tion point is visible. Te
rm inal connection diag ram #
Remo vethe co ver from positive term inal 3of
th e donor batter y. #
Connect the positive term inal clamp of the
jump lead topositive term inal 3ofthe donor
batter y,and then topositive term inal 5ofthe
jump-start connection point. #
Connect the negative term inal clamp of the
jump lead tonegative term inal 2ofthe donor
batter y,and then toear thcontact 4ofyour
ow nve hicle. Breakdown assis
tance
241 241

#
Start the engine of the donor vehicle and run it
at idling speed. #
Start theve hicle and let the engine runfo r a
while. #
Before disconnecting the jump leads, switch
on an electrical consumer in your ow nve hicle,
e.g. there ar wind owheater or the lighting. #
Disconnect the negative term inal clamp of the
jump lead from ea rth contact 4and then
from negative term inal 2ofthe donor bat-
te ry. #
Disconnect the positive term inal clamp of the
jump lead from positive term inal 5onthe
jump-start connection point, and then from
positive term inal 3ofthe donor batter y.
Contact pr otection co ver1 is automatically
re turned forw ards toits original position bythe
spring forc e and the jump-start connection
point is closed. #
Position the co ver on positive term inal 3of
th e donor batter y. #
Have the battery checked at a quali/ed spe-
cialist workshop.
Char
Char ging t
ging t he 12 V batt
he 12 V batt ery
ery
* NO
NOTE
TEDamage tothe electronics caused
by non-appro vedch arging devices Charging a /tted battery with a battery
charger
which has not been appr ovedby Mercedes-
Benz can damage the on-board electronics. #
Only use a battery charge r which has
been appr ovedby Mercedes-Benz and
which permits charging the battery when
it is /t tedintheve hicle. #
Only charge the battery using the jump-
start connection point. A battery
charge r specially adap tedfo r Mercedes-
Benz vehicles and tested and appro vedfor
Mercedes-Benz is available as an accessor y.
Fu rther information is available from any
Mercedes-Benz Se rvice Centre. Read the operat-
ing inst ructions foryo ur charge r before charging
th e batter y.
Re charge the battery more frequently if you use
th eve hicle mainly for short trips and/or drive at
low outside temp eratures. #
Connect the battery charge rto the positive ter-
minal and ear thcontact in the same order as when connecting
the donor battery in the
jump-starting procedu re.
% If a battery is not /tted and not in service, you
should charge itev ery thre e months. This
helps tocounteract self-discharging and pre-
ve nt damage tothe batter y.
12 V batt
12 V batt er
ery care
y care
* NO
NOTE
TEBattery dischar gedue toleakage
cur rents Dirty bat
tery term inal clamps and battery sur-
fa ces cause leakage cur rents. This can lead to
th e battery discharging. #
Keep the battery term inals and battery
sur faces clean and dr y. *
N
NO
OTE
TE Damage tothe battery housing due
to improper cleaning If
yo u use cleaning agents containing fuel,
th ese can damage the battery housing. #
Do not use cleaning agents containing
fuel. *
N NOOTE TE Damage tothe battery due toself-
dischar ge If dirt
gets into the battery cell, the self-dis-
ch arge ofthe battery is increased and the bat-
te ry can be damaged. #
Only clean the battery with the cell caps
scr ewe d in. Obser
vethefo llowing points on battery care: #
Regular lych eck the battery term inals and the
fa stening of the negative cable tothech assis
to ensure that they are /rmly seated. #
Lightly grease the undersides of the battery
te rm inal clamps with acid-resistant grease. #
Only clean the battery housing with commer-
cially available cleaning agents. Disconnecting and r
Disconnecting and r
emo
emoving t
ving t he st
he start
arter batt
er batt ery
ery &
W
WARNING
ARNING Risk ofexplosion due tohydro-
ge nga s igniting
If, when charging a batter y,there is a short cir-
cuit or spar ksstart toform ,th ere is a danger
of hydrogen gas igniting. 242
242
Breakdown assis
tance