I've got a problem with the tachometer hand(lancet), when the rpm on the lower gear are at the minimum the lancet oscillate slightly.
I brought the car in assistance but all the values were fines, checked against THEC2 instrument. I did some testing myself and I found out that if I remove the battery for at least a day then back again in service the problem vanish for few days (3-4), I'm quite sure it is not the instrument since while driving and keeping the same speed for several seconds the lancet behave properly as I espected. Some Opel services told me it could be related to FAP, could you please let me know if any of you had the problem and how you solved it?
Thanks a lot