Acctualy what are the major differences between a M sport and the Normal 525i ? other than the suspension , anti roll bar and the wheels.
Apart from what you have mentioned, difference when it comes to the trim (brushed aluminum vs wood, etc), interior lining (black vs grey), steering (3-spoke Msport vs normal 4-spoke), seats, bodykit. Engine is the same, but some swear its tuned differently (unverified).