yorkiman

Hi, can any other Audi owners out there help me? I own an Audi A6 Allroad 2.5tdi quatro, this is my third Audi, ALL have had the same problem, a dramatic loss of power for no apparent reason. Audi themselves say they cant find anything wrong ? someone said it could be the air mass meter ? or the turbo, both replaced on previous cars but didnt work, now my latest Audi is doing the same. PLEASE HELP.