I have a 1982 300SD, as of yesterday, the turn signals won't self cancel. they flashers stay on after a turn when the wheel comes back to center position I can't figure out why. I thought it was the cold but I don't know. I'm not sure about how the mechanism works. The signals still work. Any ideas?

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1982 300SD
1967 250S
...what was I thinking......

If it's set up as everything else I've ever worked on, (never had a steering wheel off a Benz yet) its a typical problem, where the plastic spring tabs have broken off of the part that "rocks" each way when you pull the lever. Those tabs ride along a collar attached to the rotating steering wheel, which has 2 bumps on it that push on those tabs to snap it back off @ center.

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Chris
64 190D R.I.P.
80 240D W/617 engine -for sale
82 240D -for sale

if the steering box was replacent and not lined up right with the wheel it will do that....drive around and do alot of turns and test to see if one blinker KINDA works maybe intermittently then it is for sure just the wheel.

if it is then you have to disconnect it from the steering box and re do it...kind of a pian though.

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Wie lange wird Ihr Auto leben?

Could be a failing combination switch. Grab another from a boneyard, if possible.

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83 SD

84 CD

Pull out the switch and have a look.. If the plastic tabs aren't broken you probably can lube it up with WD40 or similar, I did this on my W111 and it worked like a charm afterwards.

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Tomas, Sweden
1966 Mercedes Benz 230S with OM617.912, automatic. Disk brakes from W108
1983 Mercedes Benz 300TD grey, OM617.912 and 5-speed manual
1983 Mercedes Benz 300TD blue 7-seater, OM617.912 and 5-speed manual

the blinkers themselves work all the time. they just don't cancel. both sides stopped working at the same time, right after it was really cold. I'm thinking they just need to be lubed.

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1982 300SD
1967 250S
...what was I thinking......