Lets add to this post.

In the Haynes manual they show quite abit of different electrical schematics based on the country of origin of the car. And if you look at the different schematics you can determine that some deliveries allow parking lights and fog lights. I have not analyzed the detail of the schematics to determine whether it is the switch or the wire harness that allows this. so if you want to allow fog lights with parking lights. Review the schematics and figure it out.

I did love the 300SDL's ability to have just the parking lights and the fog lights.

Dave

__________________
1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car