when driving my 06 a4 2.0 the rpms go up and down but if i step on the throttle harder or let off it stops doing it! any ideas? also does anyone know how to disable the seatbelt buzzer?

 

There is a thread here: https://www.audiforums.com/forum/b7-...anyone-165387/

My reply in there includes a link to a huge link at Audizine's forums that has the info, but it looks like you have to have an account now. Maybe you can register and get it. I did it a while ago, but it wasn't too hard. I chose to not disable the chime altogether, but just to disable the 30sec repeated reminder. I also recommend the key fob window up/down, corner amber light delete and the unlock all doors with one press options.

 

Not sure if this is the same, but take a look: RPM FLUCTUATION -So common there's a TSB on it