Started my 04 Touran this morning and it let out a large cloud of stinky smoke close to the drivers side door? I have eard that this is a potential problems with the diesel pre-heater, but didnt think that the cloud plumes would be this bad.
There are some modified pipes to redirect the smoke under the car and the fuel return hose needs to be fitted into a hole in the swirl pot in the fuel tank, hope this helps.