My first post!! After trawling through this forum after getting the tell-tale smoke from my Alhambra (2003 Tdi SX) earlier this week i took the plunge and replaced the glow plug in the aux heater. All went well and seemed fine when i replaced the fuse, no smoke etc but the exhaust from the heater wasn't getting hot. I put this down to the fact that, from what i gather from this forum, the aux heater only 'kicks in' when either the outside temperature is below a certain temp or the car cooling system is below a certain temp. None of these seemed relevant yesterday afternoon. Anyway this morning the car started with the smoke signals again, so once again i have had to remove the fuse to disable the aux heater. Can anyone shed any light on on what else might cause the problem? I have read about resetting the error codes using VAG-COM, will the problem still persist if these haven't been reset after having the fuse removed? Look forward to your replies, Cheers!!