I've got a 55 plate Touareg and am suffering from intermittent exhaust fumes in the cabin. I've had it in to the dealer and they say they can find nothing, and I must say that when I'm travelling at speed it's fine. However when I'm sitting in traffic it's terrible, especially in this damp heavy weather. I can hear a pump running behind the passenger side glove box which I assume is the auxillary heater.....a ready source of exhaust fumes ! but I'm told by the dealer that this only comes in on starting, especially when the weather is from 5 C and below. and that when the engine is running at it's proper temperature that this pump cuts out, unless the outside ambient temperature is below 5 C but mine runs and cuts on and off all the time, is this right ?Anyone any ideas. I must say the car blew a seized injector in November last year and damaged the camshaft. Fortunately it was still under the dealers warranty as they had to take out the engine to recover the broken bits of camshaft in the engine. I was wondering if this could have some bearing....misaligned vent pipe ? I'm struggling with this and am going to Switzerland in two weeks time so am a little worried.