I see there are various threads on here about Aux Heater problems on Sharan's and Touran's.
My 2005 1.9 TDI (130) Sharan is now suffering from a smell of fumes inside the cabin when the vehicle has ben left stationary, i assume it to be coming from the Aux Heater, i do not get the plumes of white smoke that other people are getting but do get the fumes of what appears to be Diesel.

This often clears once the car has been driven with blowers open and on.
I don't appear to be getting the Turbine noise that i used to get after the engine is turned off either. Is this a Glow Plug fault or something more serious, if i just have the heater disconnected will it stop the Diesel fumes entering the vehicle, the Heater exhaust does not appear to be getting hot?