With every new car you can be sure that H&R provides you with a professional suspension kit that improves the looks and handling. They just announced a package for 2011 Mercedes SLK which is fully compatible with the car’s standard adaptive suspension system and lowers it by 25 mm. The kit costs only 273 Euro, and as always they offer bespoke wheel spacers as well.
The thing is, this new generation of the SLK is very ugly and such treatments don’t really make a difference.