locking wheel nuts location

[pancholi]

been looking through ebay and merc parts specialists for locking wheel nuts
part no....B66470155
should i only go with MB parts or are the alternative available?
thanks

 

[jberks]

Merc locks are made by a firm called McGuard. They make locks for other manufacturers too - a friend bought some for his Passat from Halfords. Amusingly though the key had an MB logo on it. He's they type to do a lot of research and he found that the McGuard ones are generally considered to be the best.
Check the dealer price against Halfords and the interweb.