64 12 500 Removing and installing / replacing complete heater (Thermo Top S): Notes
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2003 BMW 540i, 2002 BMW 540i, 2001 BMW 540i, 2000 BMW 540i, and 1999 BMW 540i. However, it is still accessible from the selected car via links, so may be relevant.
Remove front left wheel. See 36 10 300 REMOVING OR INSTALLING FRONT OR REAR WHEEL
Remove trim panel from front left wheelhouse.
CAUTION:
Allow engine to cool down.
Unfasten plug connection.
Close off supply and return hose as well as fuel hose with hose clips. Release hose clips (1) and disconnect hoses. Release screws (2) and remove heater.