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Quick Fix for SL Turn Signals
The turn signals and the emergency flasher went out on my '86 560SL. The fuse was good so the next thing to check was the red, emergency flasher switch. Being mounted on the shift panel, it catches all the dust that falls on it and tends to get a bit filthy. Since the turn signals are wired through this switch, it causes the majority of the problems.
Pop out the switch from the panel, disconnect the wiring connector. On a well lighted bench, over a towel to catch the parts, separate the base from the red rocker top by sliding a thin tool into the sides to dislodge the 4 catches, then gently pull on the connector pin area to slide it out. You will get two parts that come out. Do NOT disassemble further, just clean all the contacts with a rubber pencil eraser, blow it clean and gently reassemble it. Plug it back in to test it. If this cures the problem, you got off easy!
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'76 240D-Sold '78 240D-Sold '85 300 SD, 165K-Sold '88 300 TE, 165K-Sold '64 Porsche 356C Cabriolet- under restoration '86 560SL 124K Miles-Sold '94 320E Wagon, 74K Miles-128K Miles JUNKED '06 E350 Wagon, 84K Miles 07 SL550, 14K Miles |
#2
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Before doing that, just exercise the switch a few times. Sometimes the switch gets caught between off and on if it is bumped or if something is set on top of it. Making sure it is fully off has fixed the no turn signal no hazard switch issue for many. Common issue on Mercedes with that type of a switch.
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Len '59 220S Cabriolet-SOLD and living happily in Malta '83 240D 351,500 miles original owner-SOLD '88 560SL 41,000 miles - totaled and parted out https://sites.google.com/site/mercedesstuff/home '99 E300 turbo 227,500 miles '03 SLK320 40,000 miles - gave to my daughter '14 Smart electric coupe 28,500 miles '14 Smart electric cabriolet 28,500 miles '15 Smart electric coupe 28,000 miles |
#3
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I had tried the exercising of the switch and it did, indeed, clear up the problem, but only temporarily as there was just too much crap in the switch after 25 years and it failed again.
Taking it apart is a super simple job and cleaning it internally is a permanent fix that may save you a ticket - or worse- for not having working signals.
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'76 240D-Sold '78 240D-Sold '85 300 SD, 165K-Sold '88 300 TE, 165K-Sold '64 Porsche 356C Cabriolet- under restoration '86 560SL 124K Miles-Sold '94 320E Wagon, 74K Miles-128K Miles JUNKED '06 E350 Wagon, 84K Miles 07 SL550, 14K Miles |
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