Can anyone recommend or know of a business or individual who can roll-back the ECU & TCU software versions for my A6 C7 BITDI? Car was in at Audi a few months ago and whilst their they did the emissions recall which included ECU & TCU software updates. Instantly after the recall was performed the car clearly doesn't respond or perform as great as it did before. Feels more sluggish, reduced performance, gear changes are