61 20 503 Vehicle battery - closed-circuit current monitoring
WARNING: This page is about a different car, the 2011 BMW X6 and 2010 BMW X6. However, it is still accessible from the selected car via links, so may be relevant.
Necessary preliminary tasks:
To access negative lead of battery, perform the necessary preliminary work described in DISCONNECTING NEGATIVE BATTERY CABLE .
Do not disconnect negative lead of battery.
Connect BMW diagnosis system.
Connect clip-on probe to negative lead of battery. The arrow on the current clamp must point towards the battery.
Measure closed-circuit current.