Quote:
Originally Posted by audizzz
Sounds as though it could be the ignition barrel cylinder. not the bit that the key goes in but the bit behind it it. The contacts could be worn or dirty. My son has had a similar problem and has a second barrel hanging down at the moment.
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Totally agree with audizzz, this is a very common fault, I have not done one for many years but it is easy, photo below is of a coupe steering ignition switch and lock, Audi 100 is different I think, in the coupe you need to drill a 3mm hole in the alloy housing and remove the steering lock, one or both I can't remember which, in the photo below you can see the new switch and old switch, the switches are very cheap, under a £10.
