My sister has a 1998 A4 2.8 Quattro (Automatic) - for the past few
weeks, the car has not been starting reliably, and is now at the point
where it will start only once a day. It has been to two different
shops- an Audi dealership and a small, independent specialist- but no
one can determine the source of this problem. Has anyone else had a
similar issue? Suggestions?