The facelifted version looks (in my opinion) better, then the pre-facelift version (Facelift version has painted "car body", turn signal in the door mirror, covert keyhole for the trunk)
The standard engine on the SLK 200 got a supercharger with the facelift and also the interior got a lot of changes...(new steering wheels, aluminium in the center console, new and more comfortable seats) I think, you can really see, that the facelift interior is more high-grade...
Thanks to mbslk.de for all these pictures...
This is the interior of our old SLK 320 (we got it in August 2000 (it was a facelift version of course, because you didn't get this engine before February 2000))!
And also the crash result was better. The seating surface of the pre-facelift version rip out of the anchorage.
facelift version