Our Touran's pre-heater has already been 'fettled' under its VW used car warranty, no problems until a cold morning a few weeks ago when the car again started chuffing out white 'smoke', which I presume is unburnt diesel, but this time it started coming into the cabin through the air vents.

The service receptionist at the local dealer said they would take it in again to look at it, but because the car is now out of its used warranty (it now has a VW extended used warranty) the work would not be covered under warranty. I has always thought that any dealer work had in itself 1 years worth of warranty.

I do not see the point of the pre-heater - can it be disconnected?

The situation with this unburnt diesel coming into the cabin is completely unacceptable, not to mention the reaction of other drivers who clearly regard the 'smoke' as meaning the car is on fire !

Thanks