Before disconnecting battery

Turn off the ignition and other electrical loads/consumers to prevent sparking when reconnecting.

NOTE: If the ignition is not turned off when the battery is disconnected, fault memories may be set in some control units.

IMPORTANT:

There is a danger of mixing up battery cables: If the battery positive and negative leads are the same colour and you are in doubt, follow the polarity to the battery, then mark and cover the leads.
The on-board computer and clock may lose your data.

General notes on disconnecting battery

Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
Vehicles with IBS on battery negative terminal:
Do not under any circumstances pull/lever off pole shoes by force.

Do not under any circumstances release socket-head cap screw of IBS.
Disconnect terminal of BATTERY NEGATIVE LEAD from vehicle battery. Cover battery negative terminal(s) and secure.
When work is carried out on the electrical system, faults may be caused in the fault memories of some control units when the battery is connected.
When installing battery terminal: Tightening torque 61 21 1AZ .

After connecting battery

IMPORTANT: The scope of application of some systems may be restricted after a power supply interruption.

Likewise, individual settings may be lost.

Settings or activations must be carried out, depending on the equipment specification.

For example: