Hi guys

car: Audi A6 auto 2.0 tdi

i have noticed recently over my car has developed an issue, I did notice ever so slightly that the idle was a very tiny bit unsteady when idle on cold starts, and sometimes when hot. However over the past week it has got noticeably worse. The needle is unsteady and on the odd occasion flutters or jumps up and down for couple seconds. The issue is always in idle only! Car pulls and drives beautiful when running with no noises, jerks, etc and its only in idle. No lights on dash to indicate fault either.

can you advice anything guys?

cheers