Wifes car has suffered loss of power on three occaisions the last few days the first two times the Glow Plug/Engine Management light came on and the third time the Emission Control light came on as well. Each time she switched off the engine and when starting again all was ok. I've told her to use my car and we'll take hers to the VW dealer when I get home (I'm working away for the next 10 days) Could this be a problem with the DPF? or some other electronic glitch. Car has done 18000 miles. Any ideas? I'll also phone the dealer tomorrow but would be good to have some idea of the problem beforehand and how much it will cost to fix!