Thank you for the fast replies, I own a 2015 A6 C7.5 3.0TDI 245PS,which has a 0B5 transmission,172k Km on it. Clutch needs replacement,in the meanwhile I am also changing the timing chain while am at it. The mechanic suggested that since botch clutch and timing chain are getting replaced,it would be ideal for it to also get tuned to a Stage 1,better driving,better fuel efficiency and also better health measures for both the engine and the clutch.He suggests that the car will feel better overall and also the tune will protect it. He will use Revo as he has suggested. I like the idea of having a faster car and a more reliable one of course,I just wanted to get some more information about the pros and cons overall