The Sport has the E55 body kit (front and rear spoilers and side skirts) with projector beam fog lights and 1/2" wider rims that are styled like Brabus Monoblock IV's. That's the difference. I hope this helped.

Eric

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'00 E430 w/ Solaris H-7's
Brabus 19'' Monoblock V, 2 piece
H&R Sport Springs

'99 SLK230 Sport