Perfect timing! I've just discovered the very same problem with the very same circuit in my '89 420SEL. 8 Amp Fuse #15 (accessory lamps, door locks, antenna, seat adjustment, et al) keeps blowing.

BenHogan generously offered to supply a play by play for tracking down shorts with a multimeter. For those of us with the right tools, but without the know-how, this type of basic tutorial would be VERY much appreciated.

Where does one start, and how can one succeed without blowing 100 fuses in the process? Please, do tell! (Thanks in advance.)

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Eric

1991 560SEL-Euro (214,000 miles)
1989 420SEL (Retired from daily use at 325,000 miles; Use as donor vehicle)