XSwitch off all electrical consumers.
XTo remove:remove screws =and take off
trim ;.
XRemove floor covering :.
XTo install:insert floor covering :and align
with the driver's seat base and the doorway.
XPut trim ;in place and screw screws =
back in.
Disconnecting/connecting the
starter battery
Important safety notes
GWARNING
During the charging process, a battery produ-
ces hydrogen gas. If a short circuit occurs or
sparks are created, the hydrogen gas can
ignite. There is a risk of an explosion.
RMake sure that the positive terminal of a
connected battery does not come into con- tact with vehicle parts.
RNever place metal objects or tools on a bat-
tery.
RIt is important that you observe the descri-
bed order of the battery terminals when
connecting and disconnecting a battery.
RWhen jump-starting, make sure that the
battery poles with identical polarity are
connected.
RIt is particularly important to observe the
described order when connecting and dis-
connecting the jumper cables.
RNever connect or disconnect the battery
terminals while the engine is running.
Disconnecting the starter battery
!Switch off the engine and remove the key
from the ignition lock. Firstly remove the bat- tery terminals. Otherwise, you could destroy
electronic components such as the alterna-
tor.
Always disconnect the starter battery in the
battery case in the left-hand side footwell
first.
!Always disconnect the battery in the order
described below. Never swap the terminal
clamps. You may otherwise damage the vehi-
cle electronics.
If the vehicle is expected to be out of use for over 3 weeks, disconnect the batteries. This will pre-
vent battery discharge caused by off-load cur-
rent consumption.
Battery cover in the left footwell
XSwitch off all electrical consumers.
XSwitch off the engine and remove the key
from the ignition lock.
XRemove the floor covering (Ypage 228).
XLoosen screws ;and slide battery cover :
in the direction of the arrow.
The screws must protrude beyond the larger
recesses.
XRemove battery cover :upwards.
Starter battery in the left footwell
XFirst loosen and remove the negative terminal
clamp so that it is no longer in contact with
the terminal.
XRemove the cover from the positive terminal.
XLoosen the positive terminal clamp and fold it
up to the side together with the pre-fuse box.
Battery229
Maintenance and care
Z
Disconnecting andconnecting th e
additiona lbatter y(engine compart -
ment )
Important safet ynotes
GWARNING
Durin gth echargin gprocess, abattery produ-
ce shydroge ngas .If ashort circuit occur sor
sparks are created, th ehydroge ngas can
ignite. There is aris kof an explosion .
RMakesur ethat th epositive terminal of a
connecte dbattery doe sno tcome into con-
tact wit hvehicle parts .
RNever placemetal objects or tools on abat -
tery.
RIt is important that you observ eth edescri-
bed order of th ebattery terminals when
connecting and disconnecting abattery.
RWhe njump-starting, mak esur ethat th e
battery pole swit hidentical polarit yare
connected.
RIt is particularly important to observ eth e
described order when connecting and dis -
connecting th ejumpe rcables .
RNever connec tor disconnec tth ebattery
terminals whil eth eengin eis running .
Disconnecting th eadditiona lbatter y
!Switchof fth eengin eand remov eth eke y
from th eignition lock. Firstly remov eth ebat -
tery terminals. Otherwise ,you could destroy
electronic component ssuc has th ealterna-
tor.
Always disconnec tth estarter battery in th e
battery cas ein th eleft-han dsid efootwell
first .
!Always disconnec tth ebattery in th eorder
described below. Never swap th eterminal
clamps. You may otherwise damage th evehi-
cl e electronics.
Additional battery in th eengin ecompartmen t
XSwitchof fall electrical consumers .
XSwitchof fth eengin eand remov eth eke y
from th eignition lock.
XOpe nth ehoo d (Ypage 218).
XFirst loosen and remov eth enegative terminal
clamp so that it is no longer in contact wit h
th eterminal.
XRemov eth ecover from th epositive terminal.
XLoosen and remov eth epositive terminal
clamp .
Connecting th eadditiona lbatter y
!Always connec tth ebattery in th eorder
described below. Never swap th eterminal
clamps. You may otherwise damage th evehi-
cl e electronics.
XConnect th epositive terminal clamp .
XAttach thecover to th epositive terminal.
XConnect th enegative terminal clamp .
XCloseth ehood.
Carr yout th efollowin gwor kafter connecting
th ebattery:
XRese tth esid ewindows (Ypage 71).
Installing an dremovin gth eadditiona l
batter y(engine compartment )
Removin gth eadditiona lbatter y
XDisconnect th ebattery (Ypage 231).
XLoosen th ebolt sholdin gth eretainer that pre -
vents th ebattery from movin garound .
XRemoveth ebattery holder and take out th e
battery.
Battery231
Maintenance and care
Z
Installing the additional battery
XInsertth ebattery int oth ebattery case.
XInser tth ebattery holder.
XTighte nth ebolt sholding th eretainer that
prevents th ebattery in th eengin ecompart-
men tfrom moving around.
XConnect th ebattery (Ypage 231).
Charging
GWARNIN G
A discharged battery can freez eat tempera-
tures belo wfreezing point. When jump-start -
ing th evehicl eor charging th ebattery, gase s
can escape from th ebattery. Ther eis aris kof
an explosion .
Allow th efrozen battery to thaw out before
charging it or jump-starting .
If th eindicator/warning lamp sdo no tligh tup in
th einstrumen tcluste rwhen temperatures are
low, it is probably because th edischarged bat -
tery has frozen .Should this be th ecase, do no t
jump-start th evehicl eor charge th ebattery. The
servic elife of athawed battery may be shorter.
Start-up behavior may deteriorate, in particular
at low temperatures .Hav eth ethawed battery
checke dat aqualified specialist workshop.
GWARNIN G
During charging and jump-starting ,explosive
gase scan escape from th ebattery. Ther eis a
ris kof an explosion .
Particularly avoi dfire, open flames, creating
sparks and smoking. Ensur ethere is sufficien t
ventilation while charging and jump-starting .
Do no tlean ove r abattery.
GWARNIN G
Battery acid is caustic. Ther eis aris kof injury.
Avoid contact wit hskin, eyes or clothing .Do
no tinhale any battery gases. Do no tlean ove r
th ebattery. Kee pchildren away from batter-
ies. Wash away battery acid immediately wit h
plenty of clean water and seek medical atten -
tion .
!Only charge th einstalled battery wit h abat-
tery charge rthat has been tested and
approve dby th edistributo rnamed on th e
inside of th efron tcover .This device allows
th ebattery to be charge dwhen it is installed
in th evehicle. The vehicle's electronics may
otherwise be damaged.
A battery charge runit specially adapted for
Mercedes-Ben zvehicles and tested and
approve dby Mercedes-Ben zis available as an
accessory. Only this device permit sth echarging
of th ebattery in it sinstalled position .Only
charge th einstalled battery wit h abattery
charge rthat has been tested and approve dby
Mercedes-Benz, usin gth ejump-start connec -
tion poin tin th eengin ecompartment. Contac t
an authorize dMercedes-Ben zCente rfor infor-
mation and availability. Read th eoperating
instruction sfor your charge rbefore charging
th ebattery.
The additional battery canno tbe charge dfrom
th eju
mp-starting connection point.
Recharge th ebattery mor efrequentl yif you use
th evehicl emainly for short trips and/o rdriv eat
low outside temperatures .
XCharge thebattery. Observ eth enote sin th e
operating instruction sfor your battery
charger.
XIf necessary, instal lbattery. Observ eth e
note son reconnecting th ebattery.
iRecharge uninstalled, out of servic ebatter-
ies every three months. This will counter self -
dischargin gand preven tbattery damage.
Care
!
Dirt ybattery clamps and battery surfaces
caus eleak currents whic hlead to th ebatter-
ies discharging.
!Do no tuse cleaning agents containing fuel .
Cleaning agents containing fuel corrode th e
battery housing .
!If dirt getsint oth ebattery cell, battery self -
discharge will increas eand th ebattery may
be damaged.
232Battery
Maintenance and care
Fire extinguisher
Removing the fire extinguisher
Fir eextinguisher at th efron tof th ebase of th eco -
driver' sseat
XPull tab s; upwards.
XTak efir eextinguishe r: out of it sholder.
Pleas eread th einstruction son fir eextin-
guisher :carefully and familiarize yourself wit h
it s operation .Hav efir eextinguishe r: refilled
after eac huse and checked every on eor two
years .It may otherwise fail in an emergency.
Observ eth elegal requirements for eac hindi-
vidua lcountry.
Flat tire
Information on breakdown assistanc ein th e
cas eof aflat tire can be foun din th echapter
"Wheels and tires " (
Ypage 266).
Jump-starting
Important safety notes
GWARNING
During charging and jump-starting ,explosive
gase scan escape from th ebattery. Ther eis a
ris kof an explosion .
Particularly avoi dfire, open flames, creating
sparks and smoking. Ensure there is sufficien t
ventilation while charging and jump-starting .
Do no tlean ove r abattery.
GWARNIN G
Battery acid is caustic. Ther eis aris kof injury.
Avoid contact wit hth eskin, eyes or clothing .
Do no tinhale any battery gases. Do no tlean
ove rth ebattery. Kee pchildren away from
batteries .Wash battery acid immediately wit h
water and seek medical attention .
Do no tuse arapi dcharging device to start th e
vehicle. If your vehicle's battery is discharged,
th eengin ecan be jump-started from another
vehicl eor from adonor battery usin gjumper
cables. Fo rthis purpose ,th evehicl ehas ajump-
starting connection poin tin th eengin ecom-
partment.
The additional battery in th eengin ecompart-
men tis no tsuitable for jump-starting opera-
tions. If your vehicl erequire sjump-starting ,or if
you use it to jump-start another vehicle, use th e
jump-starting connection poin tin th eengin e
compartment.
When jump-starting ,observ eth efollowin g
points :
RThe battery is no taccessible in all vehicles. If
th eother vehicle's battery is no taccessible,
jump-start th evehicl eusin g adonor battery
or ajump-starting device .
RDo notstart th eengin eif th ebattery is frozen .
Let th ebattery thaw first .
RJump-starting may only be performed from
batteries wit h anominal voltag eof 12 V.
ROnly use jumper cables that have asufficien t
cross-section and insulated termina lclamps.
RIf th ebattery is fully discharged, attach th e
battery of another vehicl efor afew minute s
before attempting to start .This charge sth e
empty battery alittle.
RMak esure that th etwo vehicles do no ttouch .
Mak esure that:
Rth ejumper cables are no tdamaged.
Rbare part sof th etermina lclamps do no tcome
int ocontact wit hother metal part swhile th e
jumper cables are connected to th ebattery.
Rth ejumper cables canno tcome int ocontact
wit hpart ssuc has th eV-belt pulley or th efan .
Thes epart smov ewhen th eengin eis started
and while it is running.
iJumpe rcables and further information
regarding jum pstarting can be obtaine dat
any qualified specialist workshop.
242Jump-starting
Roadside Assistance
Before connecting the jumper cables
On vehicles with a battery main switch, check
whether the battery main switch is switched on
(
Ypage 118).
XApply the parking brake.
XMove the selector lever of the automatic
transmission to positionP.
XSwitch off all electrical consumers, e.g. audio
equipment, blower.
XTurn the key to position0in the ignition lock
and remove it (Ypage 119).
XOpen the hood (Ypage 218).
Tow-starting and towing away
Important safety notes
GWARNING
Functions relevant to safety are restricted or
no longer available if:
Rthe engine is not running.
Rthe brake system or the power steering is
malfunctioning.
Rthere is a malfunction in the voltage supply or the vehicle's electrical system.
If your vehicle is being towed, much more
force may be necessary to steer or brake.
There is a risk of an accident.
In such cases, use a tow bar. Before towing,
make sure that the steering moves freely.
GWARNING
You can no longer steer the vehicle if the
steering wheel lock has been engaged. There
is a risk of an accident.
Always switch off the ignition when towing the
vehicle with a tow cable or a tow bar.
GWARNING
When towing or tow-starting another vehicle
and its weight is greater than the permissible
gross weight of your vehicle, the:
Rthe towing eye could detach itself
Rthe vehicle/trailer combination could roll-
over.
There is a risk of an accident.
When towing or tow-starting another vehicle,
its weight should not be greater than the per- missible gross weight of your vehicle.
Information on the gross vehicle weight can be
found on the vehicle identification plate
(
Ypage 276).
!Only secure the tow rope or tow bar at the
towing eyes. Otherwise, the vehicle could be
damaged.
!Observe the following points when towing
with a tow rope:
RSecure the tow rope on the same side on
both vehicles.
REnsure that the tow cable is not longer than
legally permitted. Mark the tow cable in the
middle, e.g. with a white cloth (30 x 30 cm).
This will make other road users aware that
the vehicle is being towed.
ROnly secure the tow cable to the towing
eye.
RObserve the brake lamps of the towing
vehicle while driving. Always maintain a dis-
tance so that the tow rope does not sag.
RDo not use steel cables or chains to tow
your vehicle. You could otherwise damage
the vehicle.
!Do not use the towing eye for recovery, this
could damage the vehicle. If in doubt, recover
the vehicl
e with a crane.
!When towing, pull away slowly and
smoothly. If the tractive power is too high, the
vehicles could be damaged.
When towing away, you must observe the legal
requirements for the country in which you are
currently driving.
It is preferable to have the vehicle transported
on a transporter or trailer instead of towing it.
Tow-starting and towing away243
Roadside Assistance
Z
If the drive wheels get trapped on loose or
muddy ground, recover the vehicle with the
utmost care. This is especially the case if the
vehicle is laden.
Never attempt to recover a vehicle with a trailer
attached.
Pull out the vehicle backwards, if possible, using
the tracks it made when it became stuck.
Transporting the vehicle
!
You may only secure the vehicle by the
wheels, not by parts of the vehicle such as
axle or steering components. Otherwise, the
vehicle could be damaged.
Tow-starting (emergency engine
starting)
Vehicles with automatic transmission
!Vehicles with automatic transmission must
not be tow-started. You could otherwise dam-
age the automatic transmission.
You can find information on jump-starting under
"Jump-starting“ (
Ypage 242).
Electrical fuses
The fuse allocation chart and further information
on the electric fuses and relays can be found in the "Fuse allocation chart" supplement.
246Electrical fuses
Roadside Assistance