Many thanks. I think I will have to. Is it just me that has had smoke in the car??? Lots of people have had mentioned smoke, but I just assumed that they meant that it was coming into the car as well. This is really worrying. Can anyone suggest why or how it is coming in? It was coming in through the hole where the seat belt comes out of, and through the vent above the wheel in the back - just below where my two yr sits!!!!! Thanks It's hard to imagine how fumes/smoke from the aux heater exhaust can be getting into the car unless there is a window open or it is being drawn into the conditioning system but I do not think that is normal and wouldn't happen with the car moving forward. The exhaust is external to the car blowing towards the offside rear passenger door. There might be a slight diesel smell inside the cabin (from people getting in and out with the aux heater running) but it should not be significant. If you can actually see smoke or fumes in the car then I would definately get it seen to ASAP and minimise driving in it.