Replacing negative battery lead (M4 Convertible)
WARNING:
Observe SAFETY INSTRUCTIONS for handling vehicle battery.
Read and comply with notes on INTELLIGENT BATTERY SENSOR .
Necessary preliminary tasks:
Remove LUGGAGE COMPARTMENT TRIM ON SIDE PANEL ON RIGHT .
Slacken nut (1) on negative battery terminal (2).
Tightening torque 61 21 1AZ .
IMPORTANT:
Negative battery terminal (2) must not be forcibly pulled off under any circumstances!
Pull off negative battery terminal (2) towards top, lay to one side and secure.
Release nut (3) and battery earth lead (4).
Tightening torque 61 21 6AZ .