61 20 908 Carrying out battery "power reset"

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2015 BMW Alpina B7L xDrive, 2015 BMW Alpina B7 xDrive, 2015 BMW 750i xDrive, 2015 BMW 750Li xDrive, and 2015 BMW 740Li xDrive. However, it is still accessible from the selected car via links, so may be relevant.

IMPORTANT: Observe SAFETY INFORMATIONS FOR HANDLING VEHICLE BATTERY .

The following steps must be carried out for a "power reset"

Switch off and disconnect battery charger
Switch off ignition
Vehicles with ID transmitter: Remove ID transmitter from slot

Vehicles with comfort access system: Make sure terminal is in 0 position
Disconnect battery negative terminal
Reconnect battery negative terminal (to ensure bus activity)
Waiting time (5-10 seconds)
Disconnect battery negative terminal
Waiting time (1 minute)
Connect battery negative terminal and tighten, tightening torque 61 21 1AZ
Connect and switch on battery charger
Switch on the ignition.