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Practical hints
Battery
Disconnecting the battery
̈ Turn off all electrical consumers.
̈ Disconnect the battery negative lead.
̈ Remove the cover from the positive ter-
minal.
̈ Disconnect the battery positive lead.
̈ Remove the breather hose from the
battery.
Reconnecting the battery
̈ Turn off all electrical consumers.
̈ Connect the positive lead and fasten its
cover.
̈ Connect the negative lead.
̈ Install the breather hose.
!
Never loosen or detach battery termi-
nal clamps while the engine is running
or the SmartKey is in the starter switch.
Otherwise the alternator and other
electronic components could be se-
verely damaged.
i
With a disconnected battery
ț you will no longer be able to turn
the SmartKey in the starter switch
ț the gear selector lever will remain
locked in position P
!
Never invert the terminal connections.
!
The battery, its filler caps and the vent
tube must always be securely installed
when the vehicle is in operation.
i
The following procedures must be car-
ried out following any interruption of
battery power (e.g. due to reconnec-
tion):
ț Set the clock (see COMAND opera-
tor’s manual).
ț Resynchronize the front seat head
restraints and seat adjustment fore,
aft (
୴ page 95).
ț Synchronize the ESP (୴ page 263).