Hi guys, i have an a3 2.0 tdi 2005 with 133k miles on the clock. Ive been gettin a heavy judder when idling, usually takes for the car to get going before it goes away. Clutch and flywheel was changed last month also fan belt tensioner and new belt changed 2 days ago. Diagnostic showed air flow sensor but then it never showed back up on the 2nd diagnostic. Any help would be appreciated.