I have a drivers side door that will not lock from the inside nor the outside. It's on a 300d w123 turbo. The vac locks of course do not work either. But I just want to be able to lock it manually. Any ideas?

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-E300d '99 350k
-Suburban '93 220k
-TDI Jetta '03 350k
Sold
-F250 '96 7.3
-Dodge Ram 12V
-E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia MO Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's.

The door is closed when your trying to lock it correct?

I had an issue where my key wouldnt work so i would open the back door, close front and then lock it. Making sure that the passenger side would unlock with the key of course.

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1984 Euro 300SDC, (4spd standard)
1986 Toyota Landcruiser Diesel HJ60 5spd X2

Gone but not forgotten (some sold, some stripped)
1983 300 SD, 1985 300 SD, 1983 240D, 1986 300 SDL, 1985 300 SDL, 1983 300 D, 1984 300 D, 1985 300SD, 1987 300 SDL, 1983 300 SD, 1985 300 TD Euro, 1983 380SEC, 1990 300 D, 1987 300D, 1982 300D, 1982 300D, 1994 E420, 1987 300 TD, 1987 300 D, 1984 300 D

The door won't lock. The door-open handle on the inside is messed up a little but it still works fine. However no matter what, door open or closed I can't get the driver side door to lock. I've tried from the outside too. I can turn really hard with the key and it won't go ANYwhere. I don't know where to start to service this thing.

__________________
-E300d '99 350k
-Suburban '93 220k
-TDI Jetta '03 350k
Sold
-F250 '96 7.3
-Dodge Ram 12V
-E320 '95 200k
-E320 Wagon 1994 155k
-300d Turbo '87 187k miles
-E320 1994 200k
-300d Turbo '84 245k (sold to Dan62)
-300d Turbo '84 180k
-300sd '80 300k
-7.3 Powerstroke Diesel 15P Van 500k+ miles
-190d '89 Non Turbo 2.5 5cyl 240k (my first MB)
Tom's Imports of Columbia MO Ruined the IP in changing leaky delivery valve O-Rings - Refused to stand behind his work. Mid-MO MB drivers-AVOID Tom's.

http://www.peachparts.com/shopforum/tech-help/158363-door-lock-issues-link-thread.html#post1214456

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1983 MB 300SD Turbo Diesel

Pull your door panel and start poking around. Sounds like one of the lever arms or pivot points may be jammed up.

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I have high regards for the author of this: http://www.peachparts.com/Wikka/W123DoorLock

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1979 240D- 316K miles - VGT Turbo, Intercooler, Stick Shift, Many Other Mods - Daily Driver

1982 300SD - 232K miles - Wife's Daily Driver

1986 560SL - Wife's red speed machine

#1. Don't try locking the driver door with it open. It is not designed to do that.

#2. There is a diy link for taking the door panel off if youv'e never done it. The map pocket has a tab that will break if you do it wrong.

#3. Take a look and some pics of the linkage. Post the pics here so we can better help.

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No matter how many times you explain it to me, I'm still right.....Surf-n-Turf

There is a diaphram thing at the lock inside door panel, somewhere air is not being allowed to push one side to the other, lock is "frozen". I had a similar deal with one, I unplugged the vac lines under hood at working yellow check valve, doors lock manually. Power locks don't work. Works for me.

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83 SD

84 CD