My Mercedes ML320CDI has covered a relatively trouble free 165,000 miles. At its last service my local MB dealer says that there is a judder in second gear (it is the 7 speed model) that is likely to prove expensive. As an avid reader of your section of the Motoring Telegraph I recall that you often recommend a specialist to check it out, and as I can't hear or feel it with or without the radio on. I would be grateful if you could remind me whom you suggest in the home counties?