67 66 520 Removing and installing / replacing drive unit for rear lumbar support: Notes
Disconnect negative battery lead, refer to 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY
Remove side section of back-rest, refer to 52 25 008 REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT SIDE SECTION OF REAR SEAT BACKREST (NORMAL/ELECTRIC)
Disconnect connector (1). Cut through cable connector (2) and pull hose downwards to remove. Unfasten screw (3) and remove lumbar support pump (4).