Comp ly wit h safety precautions and take pro-
tective measures when han dlin g batteries.
Risk of explosion.
Fire, open flames and smoking are
prohibited when handling the bat-
tery. Avoid creating sparks.
Battery acid is caustic. Avoid con-
tact wit h skin, eyes or clothing.
Wear suit able protective clothing,
especial ly gloves, apron and face-
guard.
Rins e any acid spills immediately
wit h clear water. Contact a physi-
cian if necessary.
Wear eye protection.
Keep children away.
Observe th is Operator's Manual.
For safety reasons, Mercedes-Benz recom-
men ds that you only use batteries which have
been tested and approved for your vehicle by
Mercedes-Benz. These batteries pro vide
increased impact protection to prevent veh i-
cle occupants from suffering acid burns
should the battery be damaged in the event of
an acc iden t.
In order for the battery to achieve the max i-
mum poss ible service life, it must always be
suff icie nt ly charge d.
Like other batteries, the vehicle battery may
disc harge over time if you do not use the
veh icle . In th is case, have the battery discon-
nected at a qualif ied specialist workshop. You
can also charge the battery with a charger
recommended by Mercedes-Benz. Contact a qualif ied spec ialist workshop for further infor-
mation.
Have the battery condition of charge checked
more frequently if you use the vehicle main ly
for short trips or if you leave it standing idle
for a lengthy per iod. Consult a qualif ied spe-
cialist workshop if you wish to leave your
vehicle parked for a long period of time.
On ly replace a battery with a battery that has
been recommended by Mercedes-Benz.
Remo ve the Sm artKey if you park the vehicle
and do not require any electrical consumers.
The vehicle will then use very lit tle energy,
t hus conserving battery power.
If the power supply has been interrupted, e.g.
if you reconnect the battery, you will have to:R
set the clock via Aud io 20 or COMAND (see
separate operating instructions). R
reset the function for folding the exterior
mirrors in/out automatically, by folding the
mirrors out once ( Y
page 109).
Charging the battery
G WARNIN G
During charging and jump-starting , explosive
gase s can escape from th e battery. Ther e is a
ris k of an explosion .
Particularly avoi d fire, open flames, creating
sparks and smoking. Ensure there is sufficien t
ventilation while charging and jump-starting .
Do no t lean ove r a battery.
G WARNIN G
Battery acid is caustic . Ther e is a ris k of injury.
Avoid contact wit h skin, eyes or clothing . Do
no t inhale any battery gases. Do no t lean ove r
th e battery. Kee p children away from batter-
ies. Wash away battery acid immediately wit h
plenty of clean wate r and seek medical atten -
tion.
G WARNIN G
A discharged battery can freez e at tempera-
tures below freezing point. When jump-start -Battery (vehicle) 329
Breakdown assistance Z
