Had mechatronics replaced on 132 tsi Passat B8 under warranty. Ever since car behaves totally differently than before racing up through the gears reaching 5 th gear by 40 klmph, 6 th gear by 50 klmph and 7th gear around 63 klmph. I can feel the engine struggling as when the gear changes as such low speed/revs upon changing revs usually drops to 1100rpm. I have taken it back to dealership for this reason and they say new mechatronics units have new software and this is how they operate. It is not nearly as nice a car to drive as it was before. Has anyone else had such issues subsequent to having the mechatronics replaced?