In the removal and refitting of any switch, one should disconnect battery negative lead and reconnect it too. Removal of the steering column combination switches To remove the steering column combination switches, remove the steering wheel first. In the case of adjustable columns, unclip the height adjustment lever, the grub screw, and the reach adjustment lever. On 100 models, loosen the screw on the clamp, loosen the switch assembly and dissolve the wiring connectors. In regards to the A6 models, take off the lower shroud, relax the clamp screw and disconnect the wiring connectors. Removal is the opposite of refitting, which makes all the wiring connectors safe. When working with facia switch panel switches, levering the switch out with a small screwdriver is required followed by disconnection of the wiring connector and in the event of need, removal of the ventilation outlet panel and switch panel retaining screws to gain access to the wiring. Refitting is the opposite one which guarantees safe bonds. In the exterior mirror switch, take off the heater control knobs, the faceplate, and then take off the switch disconnecting the wiring connector. In the case of the driver door window switches, a screwdriver is used to press the retaining clip down and unlock the switch assembly, pinching the wiring connectors assemblies. In the case of the driver door central locking switch, unclips the switch by removing the door handle cover, screws, and the wiring connector then disconnecting the wiring connector. On the rear door window switch, take off the inner trim panel, unplug the wiring connector and take out the switch. In the case of the front passenger door window switch, unscrew the overhead console panel, disconnect the wiring connectors and take it away. Take off the control knob, undo the retaining nut, and take off the sunroof switch. In the case of the courtesy light switch, take off the rubber gaiter, loosen the screw which holds the nut, and de-connect the wiring connector and tape it up to the body so that it will not lose. The reverse is refitting, in which the rubber gaiter is correctly placed. In the case of the handbrake lever switch, dismount the rear part of the centre console, unconnect the wiring connector and unscrew the retaining screw. The reverse is refitting, and the switch should be checked before refitting the console. To replace the front seat adjustment switch assembly, pry up the trim cover, take out the retaining screws, unclip the side trim panel and unconnect the wiring connector. In front seat/mirror memory switch assembly, the switch assembly is to be carefully prised out and its wiring connector is to be disconnected. In the case of the rear seat heating switches, the rear cigarette lighter insert needs to be removed and the trim plate should be unclipped and the retaining screws should be removed to take out the heater duct assembly with the wiring connectors. Disconnect the switch by means of unclipping it off the panel. The lock assembly includes the luggage compartment light switch, unlock, pull the lock out, remove the retaining clip, remove the switch, and clip on before replacing the lock.