Hi all,

My central locking stopped working, discovered Fuse 15 blowing, blew immediately again after new fuse. This is 1989, the last version of the W126.

Thanks!

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

Fuse #15:
Trunk lamp, rear dome lamp & reading lamp, automatic antenna, central locking, exit lights, seat adjustment memory.

Gen2 W126 - 1986-1991

Right, I got that. What is typical to fail? I.e. where should I look first? Trying to reduce diagnostic work...

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

Don't overlook the reading lights in the rear seat area. When I had that problem it turned out to be one of the lights had shifted and was rubbing on the metal bodywork behind.

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Current stable:
1995 E320 157K (Nancy)
1983 500SL 125K (SLoL)

Gone but not forgotten:
1986 300SDL (RIP)
1991 350SD
1991 560SEL
1990 560SEL
1986 500SEL Euro (Rusted to nothing at 47K!)

Gone and wanting to forget:
1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]

Helpful. Thank you. Will check.

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Henry Bofinger
1989 560 SEL (black/black)
2001 Audi TT Roadster (silver/grey)

If you connect a 55 watt headlight bulb to the contacts in place of the fuse the bulb will light up if you have a dead short. Then you can proceed to unplug components on that circuit. When the bulb goes out you have found the culprit.

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Mercedes Benz Master Tech - Retired

I'd check the air pump on the lock system. One in my wagon got so hot it had burned up the board.