Hello, four months ago I had a heater installed (petrols) and since the latest trouble with it. About 3 weeks ago I noticed an unusual exhaust gas odour during operation, in the car and outside. When it became much colder last week I noticed that the heating was running significantly weaker: after half an hour of operation it had just received the lower third of the windscreen ice-free at -5°C. I claimed during installation operation. It was not possible to explain this and promised repair on guarantee. Today, the awakening: The supply line was allegedly blocked with dirt from the tank. The repair was then no longer on guarantee and I got rid of almost 300 Eur! In addition, it was said that I had to have the tank cleaned, otherwise this could happen again at any time. Furthermore, I was advised not to refuel at free petrol stations and to ask myself before refueling, if perhaps only recently the Ta The Agila still has a guarantee – I wonder if the tank could have been polluted from the factory. I already called the Opel dealer – they want up to 500 Eur for a tank cleaning and a renewal of the fuel filter. Greeting Erik