Thanks, ggleavitt. That helps. I don't have electric seats. I might see if I can get hold of a copy of the workshop manual to access that DDM!

Hello chaps, I've googled the hell out of this problem but not found much information. Recently bought D5 that's throwing a Damper Motor Defroster - no communication (DD33) code and a lower switch - faulty ID. Lots of noise but very little air flow from the windscreen vents. Aircon works, other vent...