Full battery, it sparks and petrol is fine. Always started first turn. Suddenly refuses to do more than fire and immediately stop. Audi dealers here in France refuse to even look at it. However, had key recoded - not the problem. Seems it could be immobiliser but where next or what else. Local garage towed it in and have looked for the problem but have now surrendered. Have owned the car for over 20 years and this is the first seemingly deadly problem. Any suggestions welcome.