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Old 02-14-2008, 09:47 PM
dmtinker's Avatar
Registered User
Join Date: Apr 2006
Location: Baltimore
Posts: 394
Turn signals not self canceling

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?

1982 300SD
1967 250S
...what was I thinking......
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Old 02-14-2008, 10:21 PM
Mustang_man298's Avatar
Man of the fire
Join Date: May 2006
Location: Shingletown,Ca
Posts: 941
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.
64 190D R.I.P.
80 240D W/617 engine -for sale
82 240D -for sale
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Old 02-14-2008, 11:01 PM
Dieselkraut23's Avatar
w123 ein super auto
Join Date: Nov 2005
Posts: 493
if the steering box was replacent and not lined up right with the wheel it will do 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.
Wie lange wird Ihr Auto leben?
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Old 02-15-2008, 01:35 AM
toomany MBZ's Avatar
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Join Date: Nov 2006
Location: central Va
Posts: 7,820
Could be a failing combination switch. Grab another from a boneyard, if possible.
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Old 02-15-2008, 05:42 AM
tompaah7503's Avatar
Parts may fall off
Join Date: Dec 2006
Location: Sweden
Posts: 255
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.
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
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Old 02-15-2008, 06:32 AM
dmtinker's Avatar
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Join Date: Apr 2006
Location: Baltimore
Posts: 394
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.

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