Hi We had this exact same problem, about 6 months ago. After 4 visits to the dealer to get it fixed, they finally agreed to change the Turbo - as this is what they suspected was causing the fault. However, the day it went in for the work - the guys found a hole in the inlet pipe to the turbo. Hurrah. The bad news is the problem returned about a week ago - it is booked in this Wednesday(17/12/08). Will keep you updated. David