Re: Tiptronic!
I have a fair bit of experience as I own a 2004 E55 (5 speed auto), an Audi allroad (5 speed auto) and a 750Li (6 speed auto).
I would rank the 5 speed MB transmission in the E55 9/10, BMW 7/10 and the Audi (tiptronic) 5/10.
I hope the tiptronic in the 997TT behaves more like the MB (it should as it's made by MB) than BMW or Audi.
The Audi is plain SLOW and the BMW very jerky as one can actually feel the fairly abrupt downshifts when slow coasting/braking to a stop. I can still catch the MB transmission off guard and confuse it, but it's doing a fine job dealing with all the 500lb torque, overall very happy with it.