61 21 028 Charge battery
WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
Read and comply with SAFETY INFORMATIONS pertaining to vehicle battery.
IMPORTANT:
To prevent the intelligent battery sensor from malfunctioning, use the charging points in the engine compartment.
NOTE:
Use BMW-recommended charging computers to charge the battery.