Hi all I've had my A4 Tdi 130 for nearly a year now and I have to say it is a superb car. But, there is always a but. This problem is more noticeable in the warmer months as the engine heats up more quickly but let me attempt to describe the problem. From cold (2hrs + stationary), the engine while noisey is smooth and as it should be. Then from 5 minutes and upto about 15 minutes after ignition, the car shakes violently when idle. Then after 15 minutes or so it is fine. For example, I work in Slough and the first 10 minutes of my journey is stop start. Whenever I have to wait at traffic lights, the car shakes and wobbles from left to right. If I increase the revs over 1K, the shaking just speeds up into a vibration. Looking at the temperature gauge, it seems to occur around the 75 to 90 degree area. Whenever I've tried to demonstrate it to a dealer, the car is too warm and doesn't do it. Any ideas?