For some time the exhaust emission stabilizer light keeps coming on. I have cotacted the dealer and they say the car is running OK, and they turn it off. It comes back on aftera couple of weeks. This has been going on for more than a year and I am fed up with it. I have now stuck a piece of black plastic over th light so I don't have to see it. Has anyone got a solution? My car? Passat 2001 auto l.8TD