Mercedes-Benz 2009 CLS 550, Operator'S Manual

Page: 325 / 356

Battery
323
G
Warning!
Failure to follow these instructions can
result in severe injury or death.
Never lean over batteries while connecting,
you might get injured.
Battery fluid contains sulfuric acid. Do not
allow this fluid to come in contact with
eyes, skin or clothing. In case it does,
immediately flush affected area with water
and seek medical help if necessary.
A battery will also produce hydrogen gas,
which is flammable and explosive. Keep
flames or sparks away from battery, avoid
improper connection of jumper cables,
smoking etc.
G
Warning!
Do not place metal objects on the battery
as this could result in a short circuit.
Use leak-proof batteries only to avoid the
risk of acid burns in the event of an acci-
dent.
! The battery is a Valve-Regulated Lead
Acid (VRLA) battery, also referred to as
“fleece” battery.
Such batteries do not require topping-up of
the electrolyte level. VRLA batteries there-
fore do not have cell caps and the battery
cover is non-removable. Do not attempt to
open the battery as otherwise the battery
will be damaged.
Even though VRLA batteries do not require
topping-up of the electrolyte level and can-
not be opened to check the electrolyte
level, the battery condition must be
checked periodically by performing a bat-
tery conductance test. Refer to Mainte-
nance Booklet for battery condition testing
intervals.
The factory-equipped VRLA battery is leak-
proofed. Only use a battery as replacement
that has the same security features and is
of identical size, voltage, and capacity as
the factory-equipped battery.
! As with any other battery, have the bat-
tery disconnect at a qualified workshop or
an authorized Mercedes-Benz Center if you
do not intend to operate your vehicle for an
extended period of time to prevent battery
discharge. You may also connect an acces-
sory battery charge unit expressly
approved by Mercedes-Benz for your vehi-
cle model to maintain the battery charge.
Contact an authorized Mercedes- Benz
Center for further information.
The battery, the battery ventilation hose
and the lateral plug must always be
securely installed when the vehicle is in
operation.
! Never loosen or detach battery terminal
clamps while the engine is running or the
SmartKey is in the starter switch or KEY-
LESS-GO button is in position
1. Otherwise
the alternator and other electronic compo-
nents could be severely damaged.
Have the battery checked regularly at an
authorized Mercedes-Benz Center.
Refer to Maintenance Booklet for mainte-
nance intervals or contact an authorized
Mercedes-Benz Center for further informa-
tion.
i Only replace a discharged battery with a
battery recommended by Mercedes-Benz.
i
After battery power was interrupted, do
the following:
R
Synchronize the power windows
(
Y
page 104).
R
Synchronize the tilt/sliding sunroof
(
Y
page 173).
Practical hints
Z