Hello. New member here, but just wanted to see if anyone has ever had an issue similar to mine. I just picked up this 08 CPO A4 (automatic) with 38,000 miles on it.

While driving in drive at a steady speed of approx 30 mph, the tachometer revs slightly up and down. I keep my foot steady, and am not accelerating or slowing down at all. I can visually see the tach move some (about 300 rpm's) up and down; and I can also hear a slight engine noise while it does this.

Any ideas? Is this normal, or should I get this checked out? Solutions?

Thank you.