Interested in a c63 as my next car, currently driving a 335i and looking to up the ante a bit with a v8. Have considered purchasing a new coupe c63 currently the best price I can get is 51k base price which works out around 8% discount off list. A little reluctant to order new with only an 8% discount as the hit I will take will be too great. Basically I do not require to change straight away, I am happy to wait until next year if I have to for the right car/deal. What I want to know really is the differences between the 2011 facelift saloon 63/coupe and c63 saloon model year 2008-2010. I know the interior has changed and bumpers etc but my main concern is the new gearbox in the 2011 cars. I have heard various things about this box compared to the old one. Some say its twin clutch some say its not. Is it really worth buying a 2011 model car ie a new order just for the new gearbox? Is it that much better? I have found some 2009 model cars for around 39-42k. Various spec some inc performance pack and some without. So it's a considerable saving over buying new (at least 55k with performance pack plus and lsd- more with command). Another key point for me is mercedes warranty so the car cannot be more than 2 years old ideally with a year of warranty remaining and ability for me to extend. Is the performance pack really needed? I know a kleeman tune can take these cars to over 500hp, granted without the upgraded internals but assuming that many have tuned their standard non pp cars to well over 500 it doesn't seem very important to me? Lsd is another problem, most used examples don't have one. Again is this something mercedes will retrofit for me to keep warranty intact? Any advice from current owners would be great, I know the running costs are brutal but I'm game with that. 10mpg here I come.