Hi all, names Will, I've been an Audi driver for 6 years, I recently bought an A4 2.4 V6 Multitronic (2002), its a great car with full leather etc I bought it after someone writing off my B6 TDI which I had for 6 years, there is 1 problem, at 1.2k rpm upto around 2k theres a vibration like a misfire but the plugs and leads have been changed, its worse when coming down the box especially coming down below 15mph, I have asked several mechanics but they don't know what it could be, has anyone ever experienced problems with this? Thanks in advance Will