Hello everyone...I'm CHW and I just joined the forum today. It looks like a great source of information, which is exactly what I need! I'm very confused about what quality wheel locks to buy for the 2013 SLK 25 I just bought. It has the sport package with the AMG 18" wheels, but I have no information re lug bolt length, threads, stud diameter, cone or ball seat, etc. Any help would be appreciated, especially a recommendation of a manufacturer whose product [preferably black] will actually fit. Thanks very much.