61 20 900 Disconnecting and connecting battery negative lead: Notes
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2012 BMW 328xi, 2012 BMW 328i, 2011 BMW 328xi, 2011 BMW 328i, and 2010 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Observe SAFETY INSTRUCTIONS for handling vehicle battery.
Follow INSTRUCTIONS for disconnecting and connecting battery
Follow INSTRUCTIONS for disconnecting and connecting battery
IMPORTANT:
Do not under any circumstances use force to pull/lever off INTELLIGENT BATTERY SENSOR (IBS) .