This is the list of parts needed according to www.diagnostics.org.uk

Headlamp, ASSY, LH-LH Traffic
Headlamp, ASSY, RH-LH Traffic
Control Unit, headlamp levelling, (used with AFL)
Control Unit, Headlamp Ignition with seal
Control Unit Headlamps
Sensor, Headlamp levelling
Nut, Hex, M6, sensor to rear axle
Bracket, Headlamp levelling sensor
Control Unit, Angle, Headlamps, (Used with AFL)
Electrical connector for levelling sensor.
Light switch without manual levelling switch.