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#1
08-09-2011, 05:36 PM
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The old 1981 300 SD locks only sometimes
Hi all,
Having an intermittent problem with locking up the old car. It either works smooth and easy to lock or stubbornly will NOT lock when I turn the key clockwise. I lubed up the key slot with graphiteand worked the key in and out. I also lubed all the lock pulls with a sillicone lubricant spray. The car has done this off and on over the years, and then work flawless for months. Any ideas on how to remove this curse?  thanks, NicK 
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#3
08-09-2011, 08:21 PM
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If you are handy then put in keyless remote control and forget about the lock. It may be cheaper than to tinker with the lock. You may need to put an actuator in the door but it is easily done.
__________________
Not MBZ nor A/C trained professional but a die-hard DIY and green engineer. Use the info at your own peril. Picked up 2 Infractions because of disagreements. NOW reversed.  W124 Keyless remote, PM for details. http://www.peachparts.com/shopforum/mercedes-used-parts-sale-wanted/334620-fs-w124-chasis-keyless-remote-%2450-shipped.html 1 X 2006 CDI 1 x 87 300SDL 1 x 87 300D 1 x 87 300TDT wagon 1 x 83 300D 1 x 84 190D ( 5 sp ) - All R134 converted + keyless entry.
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#4
08-09-2011, 08:43 PM
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Don't do it. Fix it properly. Sounds like you have a vacuum problem to me. Maybe a $20 actuator going bad in the door.
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#5
08-09-2011, 08:48 PM
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Are you saying the key won't turn or the key turns but the locks don't lock? If the latter, it could be an electrical problem since the 126 door locks are actuated by an electric vacuum pump.
__________________
1977 300d 70k--sold 08 1985 300TD 185k+ 1984 307d 126k--sold 8/03 1985 409d 65k--sold 06 1984 300SD 315k--daughter's car 1979 300SD 122k--sold 2/11 1999 Fuso FG Expedition Camper 1993 GMC Sierra 6.5 TD 4x4 1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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#6
08-09-2011, 10:47 PM
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key lock
I can insert the key, and tried both sides, still won't work. When I insert the key, it can turn counter-clockwise but NOT clockwise at all. Interestingly, When driving down the road I can actuate all the door locks up & down! When I stop the car & try and lock it, it goes all stiff and would break a key if forced!
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Linear Mode
