There is currently some short on the 300d. The radio/interior light fuse keeps blowing, which also takes out my radio. So I wired the the power connector (constant power) directly to the battery. The other power wire is still connected to the ignition. My radio works now and I still need to find out why my fuse keeps blowing.

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1987 Mercedes 300sdl, 280k mi (daily driver)
1982 Mercedes 300sd, 205k (occupying driveway)
1985 Mercedes 300d, CA, 148+ mi.
1986 Chevrolet suburban, 50k? or 150k? mi, diesel
1998 BMW 740il, 120k mi (for sale)
1999 Honda CBR900RR, 42k
1997 Jeep Wrangler Sport, 103k miles (sold)