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Date registered: Oct 2002
Vehicle: 1967 250 SL, 1963 220Sb
Location: Los Angeles / Altadena
Mentioned: 3 Post(s)
Quoted: 102 Post(s)
That would be the european tow hitch. Some people have used them. Not exactly the same size as US, but probably close enough. Read here for more info on the differences:
Tow hitch - Wikipedia, the free encyclopedia
The round cap thing to the lower left of the hitch is the electrical hookup. The cover to that should hinge away revealing a set of pins for a plug. There might be an adaptor plug.
One difference between the US and rest-of-world hitch is that US hitches have something to connect a chain to. (don't they?)
Currently: 1967 250 SL, 1963 220Sb, 1965 300SE Lang, 1971 280SE parts car, 1972 Alfa GTV, 1965 Alfa Duetto, 1993 BMW R100R
Past: 1971 250 C, 1985 300 TD, 1967 250 S, 1968 280 S,1981 300 D, 1982 280CE, 3 Facel Vegas, Borgward Isabella Coupe, Alfa 2600 Sprint, Volvo P1900 (yes), numerous less interesting Volvos, ...