these fit perfectly and are basically the same sills, including the finish, as the original Xfire limited sill. so if you have a base model or have beat-up sills and would like a change from the same ol' thing. I got both of them new from mercedespartscenter.com for $128 including shipping. part # A 170 680 03 35. note too that I have 8 way passenger and driver slk seats, other than some altering of the harnesses, fit right in too. I really love these cars and their relationship to the slk and the ability to buy mercedes parts. what an array of options we have.