[Booty]

You have to remember though that the turbo ' chops up the sound'. A naturally aspirated I5 will always sound more 5 potty. BUT, get rid of the centre box, or severley reduce the size and have a nice back box. Turbo's need the least amount of back pressure that you can get away with. You should be able to get yours sounding like an MB or WR with a Scorpion.
Also just thinking that your car, with it being a 200, will probably have better sound deadening than an Ur due to the more 'upmarket' status of the car. My S6 is the same. She has a sodding great 20v motor in it shoving in the region of 290 - 300bhp and you can hardly hear it from outside the car never mind the inside. Peel the carpets back in the footwells and the amount of insulation / carpet thickness is incredible.......just a thought.