06SL500AMG

Our friends have this rim on their CLK500 and now I want to put it on my SL500. I can't find anything about this rim however I did stumble upon a listing where someone has a set for sale, but I have yet to hear from that seller. If that doesn't work then I would love to know if this is a Mercedes rim or if it's an aftermarket rim! A picture of the rim is posted below. Any help would be greatly appreciated!