Hi, I own an A3 2.0 TDI auto S-line and was wondering about my glow plugs. The car runs really rough when the travelling pretty slow (20-40) and the revs keep dropping and then rising. Also when slowing down from say 70, it sounds like the revs are too high and its struggling to change down ( Being an auto ). Also when trying to accelerate the car shakes like its trying to accelerate from a too higher gear! Hope this makes sense! P.S This is all on top of the misfiring engine!