Mercedes-Benz S 320 CDI, Owner'S Manual, Page: 544 / 588

522
Practical advice
Battery
Starter battery
1
Negative terminal
2
Positive terminal
i
If the consumer battery is discharged, it will
be necessary to unlock the vehicle using the
emergency key element. However, it is still pos-
sible to start the vehicle because it has a sepa-
rate 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 (
컄
page 258) and use the
KEYLESS GO key in the same way as the normal
key.
왘
Move the transmission selector lever
to P .
왘
Switch off all electrical consumers.
왘
Turn the key to position 0 in the igni-
tion lock.
왘
Turn the key to position 1 in the igni-
tion lock.
왘
Wait 30 seconds.
The internal functions of the vehicle
network are switched off.
왘
Turn the key to position 0 in the igni-
tion lock.
!
Do not remove the key.
Disconnecting the starter battery
왘
Open the bonnet.
왘
Remove the negative terminal using a
10 mm open-jawed spanner.
왘
Remove the cover from the positive ter-
minal.
왘
Remove the positive terminal clamp
from the battery.
왘
Pull off the breather hose.
i
For your convenience, have the battery re-
moved at a qualified specialist workshop, e.g. a
Mercedes-Benz Service Centre.
왘
Fold the bar on the starter battery up-
wards and remove the starter battery.
Disconnecting the starter battery
P54.10-2589-31
Removing the starter battery