got the X back 2 days ago, they reprogrammed the software and "tweaked" it out (already have the updated version). Since i got it back all i can notice is that there is hardly a difference in sport or normal mode. Oh and the jerk problem, its still there and the dealer says to drive it and see if it gets worse and then they would replace the tranny under warranty, so any suggestions if changing a tranny without knowing the problem is a good idea?

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" Despite its supercar attributes, the M5 still doubles as a soberly practical, spacious saloon - only with the ability to scare four passengers in comfort all the way to the local coronary unit". Top Gear