Hi all,
Has anyone heard of AC vent controls going haywire?
Buzzing, flicking, ticking MANY times a second under/in the dash... Like a relay endlessly trying to do something, but failing (wild guess).

The only other AC related issue, might be connected... AC does nothing,...

Does anyone use fuel additives (eg. octane booster). Are these good or bad for your engine? which brand(s) do you use or recommend?

VW will sometimes provide fuel additives (valve lubricant IIRC) when you pick your car up from a service.

- thinking there should be some general...