Since you and a couple others have mentioned them...

Mercedes Wheels | The Wilhelm by Mandrus

The lip is a bit smaller than comparable wheels in other brands, but when asked, Mandrus told me the reasoning behind it was to allow more space for the larger 4-pot calipers on the Mercedes cars with upgraded brakes.

Honestly, I like the fact that the lip is a bit more subtle... On the factory SRT wheels, the lip is barely present on the front and less than one inch in the rear...

Easiest way I've found to clean these is a microfiber washcloth. I spray them down with high-pressure to knock the bulk of the dust off, then I clean around each spoke with the sudsy cloth. I also use a gentle microfiber covered "sponge on a stick" to get the barrels clean. Spray clean, and dry off. My ONLY complaint about these is the deep lug pocket, that holds water after you rinse. Don't bother drying the wheels until this water is removed (by whatever manner you see fit).

As Nick and Steve will tell you, the wheels are stunning in person but photos don't flatter them too much. In fact, Nick hated them in the photos, but LOVED them once I pulled up to his house one afternoon.