12 00 ... Instructions for disconnecting and connecting battery: Notes

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2010 BMW M6, 2009 BMW M6, 2008 BMW M6, 2007 BMW M6, and 2006 BMW M6. However, it is still accessible from the selected car via links, so may be relevant.

Observe safety instructions for handling vehicle battery, refer to 61 00 ... SAFETY INSTRUCTIONS FOR HANDLING VEHICLE BATTERY .

Before disconnecting battery:

Switch off ignition.

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 leads: If the battery positive and negative leads are the same color and you are in doubt, follow the polarity to the battery, then mark and cover the leads.
On vehicles with radio code: After disconnecting the battery, the radio code must be re-entered. Therefore obtain the radio code card from the customer beforehand. Note stored stations and restore them after connecting the battery.
Stored settings of the on-board computer and clock will also be lost.
All available central keys must be recoded for cars with first generation infrared transmitter locking systems.

General notes on disconnecting battery:

Do not disconnect battery leads and leads from alternator and starter motor while engine is running.
Cars 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.
Detach terminal of battery negative lead from car battery and second battery if fitted, refer to 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD . 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 fitting terminal for battery negative lead: Tightening torque, refer to 61 21 1 AZ in , refer to 61 21 1AZ in GENERAL ELECTRICAL SYSTEM - TIGHTENING TORQUES - 645CI .

After connecting battery:

IMPORTANT: After a power supply interruption some equipment is disabled and must be reactivated.
Likewise, individual settings are lost and must be activated.
Example:

Activate sliding sunroof, refer to 54 0 ... NOTES ON PANORAMA GLASS ROOF (INITIALIZATION/NORMALIZATION/LEARNING OF CHARACTERISTIC CURVE) .
Vehicles with AFS only: Activate steering angle, refer to 61 00 ... VERSION WITH AFS: SETTING STEERING ANGLE (AFTER RECONNECTING VEHICLE BATTERY) .
If necessary, activate power windows.
If necessary, activate mirror with compass