Mercedes-Benz CL-Class 2006 Owner's Manual page 516

Disconnecting the starter battery
!
Always disconnect the battery in the order
described below. You may otherwise damage the
vehicle electronics.
!
Switch off the internal functions of the vehi-
cle network before disconnecting the starter bat-
tery. It is not necessary to switch off the internal
functions of the vehicle network if the vehicle
has been parked up for more than one hour with
no key in the ignition lock.
Switching off the internal functions of
the vehicle network
i
On vehicles with KEYLESS GO, remove the
KEYLESS GO button ( page 230) and use the
KEYLESS GO key in the same way as the normal
key.
Move the transmission selector lever
to P.
Switch off all electrical consumers.
Turn the key to position 0 in the igni-
tion lock.
Turn the key to position 1 in the igni-
tion lock.
Wait 30 seconds.
The internal functions of the vehicle
network are switched off.
Turn the key to position 0 in the igni-
tion lock.
!
Do not remove the key.
Disconnecting the starter battery
Open the bonnet.
Remove the negative terminal using a
10 mm open-jawed spanner.
Remove the cover from the positive ter-
minal.
Remove the positive terminal clamp
from the battery.
Pull off the breather hose.
Removing the starter battery
i
For your convenience, have the battery re-
moved at a qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
Fold the bar on the starter battery up-
wards and remove the starter battery.
Practical advice
Charging the battery
G
Risk of injury
Never charge a battery while it is installed in
the vehicle, unless you use a battery charger
that has been tested and approved for
Mercedes-Benz vehicles. With these battery
chargers it is possible to charge the battery
without first removing it from the vehicle. Oth-
erwise, the vehicle's electronic system may
be damaged. Before charging the battery,
check the central vent for correct seating.
Batteries without a central vent must be re-
moved before charging.
Only charge the battery in a well ventilated ar-
ea. As the battery is being charged, gases can
escape and generate minor explosions, which
may injure you and other persons or cause
damage to the paintwork or acid corrosion on
the vehicle.
G
Risk of injury
You can obtain information about batteries
and battery chargers with which it is possible
to charge the battery while it is installed in the
vehicle from a qualified specialist workshop,
e.g. a Mercedes-Benz Service Centre.
Batteries
495