My 2006 petrol V8 Touareg has intermittent cutting out/loss of power and surging. When I switch off and restart the problem goes away as long as the gas pedal is pressed. Once the gas pedal is released, even slghtly, the problem comes back. The Treg was with agents for 4 months and over that period they did all sorts of things. The Treg does not show any faults. I suspect the petrol filter/s. But I am sceptical because is would not expect the problem to go away when the car is switched off. It sounds like an electronic problem that resets when the car is switched off. Please help anyone!