Audi Cruise Control - Wally Zebon
I have an Audi 80 S2 with cruise control on the indicator stalk.
It only works about one in every ten times I try it and when it does work, it switches itself off after about two minutes.

While it is working I accelerate and decelerate using the switch, but it's simply not reliable.

I had an Audi dealership look at it when it was in getting a service recently. They ran out of time, but had already worked out that the switches under the pedals are OK, as is the vacuum system.

Can it be something as simple as the actual switch? Or am I looking at an expensive repair?
Any help would be appreciated.