Hi, Got my car a few weeks ago (2006 1.6 A3) and noticed that when idling the engine judders randomly which shakes the car about a little bit. It's not very noticeable but enough for me to take it back in. Never had this in any of my other cars. So, took it back to Audi and they said it had a misfire in two of the cylinders. They replaced the spark plugs and the HT leads, told me it was fine and left a note on the invoice saying that the 1.6 engine is naturally unbalanced. However....the fecking judder came back this morning! Any ideas guys? Is this normal? Cheers.