61 20 503 Vehicle Battery - Closed-Circuit Current Monitoring
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 135i, and 2010 BMW 128i. 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 using diagnosis system.