Removing vehicle electrical system support battery

WARNING: Working on 12 V vehicle electrical system.
Risk of short circuits! Risk of fire!

Make sure that no charger is connected to the jump start support point in the engine compartment.
Detach battery earth lead from battery.
With auxiliary batteries: Detach all battery earth leads from additional batteries.

Preliminary works

Deactivate the 48 v ELECTRICAL SYSTEM .
Disconnect all battery EARTH LEADS .
Remove the rear right engine compartment COVER .
Remove left and right WIPER ARM .
Remove cowl panel COVER .
Remove spring strut dome TRAILING LINK .

WARNING: Working on 12 V vehicle electrical system.
Risk of short circuits! Risk of fire!

Make sure that no charger is connected to the jump start support point in the engine compartment.
Detach battery earth lead from battery.
With auxiliary batteries: Detach all battery earth leads from additional batteries.

Pull off the vent hose (1).
Loosen the screw (2) and remove the battery holder.
Loosen the nut on the negative battery terminal (3).
Pull off the negative battery terminal (3) from the negative battery terminal.
Put the battery earth lead to one side and secure it.
Loosen the nut on the positive battery terminal (4).
Pull off the positive battery terminal (4) from the positive battery terminal.

Courtesy of BMW OF NORTH AMERICA, INC.
WARNING:
Unprotected battery terminals.
Risk of short circuits! Risk of fire!
- Cover the vehicle battery.
Place the positive battery cable to one side and secure it.
Remove the vehicle electrical system support battery (5).