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Practical hints
Battery
Charging and reinstalling the battery
̈ Charge battery in accordance with the
instructions of the battery charger
manufacturer.
̈ Reinstall the charged battery. Follow
the previously described steps in
reverse order.
Reconnecting the battery
̈ Turn off all electrical consumers.
̈ Remove SmartKey from starter switch.
Vehicles with KEYLESS-GO*:
̈ Open the driver’s door.
̈ Connect the battery positive lead and
fasten its cover 3 (
୴ page 448).
̈ Connect the battery negative lead 2
(
୴ page 448).
̈ Reinstall the filter box (୴ page 447).
Batteries contain materials that can harm
the environment if disposed of improperly.
Large 12-volt storage batteries contain
lead. Recycling of batteries is the preferred
method of disposal. Many states require
sellers of batteries to accept old batteries
for recycling.
Warning! G
Never charge a battery while still installed in
the vehicle unless the accessory battery
charge unit approved by Mercedes-Benz is
being used. Gases may escape during charg-
ing and cause explosions that may result in
paint damage, corrosion or personal injury.
An accessory battery charge unit specially
adapted for Mercedes-Benz vehicles and
tested and approved by Mercedes-Benz is
available, permitting the charging of the bat-
tery in its installed position. Contact an au-
thorized Mercedes-Benz Center for
information and availability. Charge battery
in accordance with the separate instruc-
tions for the accessory battery charger.
!
The battery, its filler caps and the ventilation
hose must always be securely installed when the
vehicle is in operation.
!
Always connect the battery in the order de-
scribed below. Otherwise the vehicle’s electron-
ics can be damaged.
!
Never invert the terminal connections!
i
The following procedures must be carried
out following any interruption of battery power
(e.g. due to reconnecting):
ț Set the clock (୴ page 158). Vehicles with
COMAND*: see COMAND operator’s manu-
al.
ț Synchronize the side windows
(
୴ page 251).