you can just buy seme repalcements. *************** has 'em for $39 for the drivers and $31 for the passenger. You might find a friend's MBZ to put 'em in and see if you get the same problem, which would support it being a switch issue. I like the twiddling the fuse idea ! But when I had some fail, I took 'em out and did a post-mortem on the old ones. They were way corroded, even to my non-expert eyes. You've gotta admit that for these electrical doo-dads to function at all after 25 years , they are doing pretty well.

__________________
Der Panzermann und Fraulein Fahrvergnuegen

1991 420SEL 201K "The Big Blue One"
1985 300DT 205K chassis/285K engine nee California emissions "Goldbug"
1983 300TDT 255K "The Womble"
1983 300 DT 214K "Sea Sprite"-Rear-ended a truck
1983 300SD 285K "The Donor" Gave his life so that others can live
1980 500SL Euro 105K "Der Panzer"