I removed this moulding on my 98 C230 a few months ago. There is a bolt on the underside of the car, near the front of said moulding which needs to be removed, I think it is a 10mm. Once this is removed there are 3 plastic clips which hold the moulding to the fender. You'll have to pry a little to remove these so be careful not to scratch anything. I had to replace the clips on mine but if you are careful I think you could re-use them.

Best of luck...
Matt