hi guys, after swapping cars for a day after a flat on my a3, i was alarmed by the lack of power on my dads a4 1.9tdi 115. No turbo pickup and stuggling to keep up 60 on an inline on the m1. ive done some research on here and dont think its fitted with a dpf and have been told its an issue with the turbo. The cars is used for very few local miles vey much start stop with very little oil warming before setting off, have been advised to add a turbo cleaner to the fuel and take on a run otherwise its a new turbo. any advice please...thanks in advance.