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#1
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central locking problem
The car is an 87 300 SDL. I'm having problems. The driver door key will not lock or unlock, but if I reach in from the rear door and press button on drivers door with door closed all doors will lock. Passenger door key will lock and unlock,but pressing the button does not work. The trunk key worked both ways until today, now it will not lock. It does not seem to be a vacuum problem. I have had it locked for several days and it will unlock and lock again without running motor. Any details to inspect and repair will be appreciated.
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#2
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Sounds like your driver's side tumbler is dirty.
This is for a W123, but your car should be similar: http://www.peachparts.com/Wikka/W123DoorLock The passenger lock should not opperate the central locking system
__________________
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 |
#3
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Thanks!!! That is a great tutorial. The only thing is: the key at he passenger door and trunk did operate the central locking system when I bought the car. The performance has since deteriorated. Is it possible that all tumblers need to be cleaned as you recommend or could it be something else. Either way I greatly appreciate your responce
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#4
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Hmmm...must be slightly different than the W123. It is most likely a problem with the vacuum valve in the passenger door if it will not operate the central locking system anymore. I would open it up and check it out.
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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 |
#5
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The key still works in passenger door to lock and unlock all doors.The button in passenger door does not work to lock or unlock. The key works in trunk to unlock, but as of today no longer works to lock. whats up dude! Just kidding I appreciate any help!!!
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#6
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Quote:
Jeremy
__________________
"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#7
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Woops...must have misread your post. Check out the valve in the trunk. It is a two way valve and it sounds like one side is not working. Does the lock button on the passenger door do anything at all? It should just have a rod linking it to the lock assembly. Perhaps it has come loose.
__________________
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 |
#8
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Quote:
The newer cars must be fancier. My W123s only have the central lock feature on the driver's door.
__________________
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 |
#9
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So! This really seems to require the knowledge of the humble who have not yet responded. Do any of you wisemen out there have this wisdom?
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#10
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Quote:
It's nice to be able to walk your date to the passenger door and unlock the whole car from there, then walk around to the driver's side and get in. Alas, I no longer get to do that. ("...can't get away to marry you today, my wife won't let me.")
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"Buster" in the '95 Our all-Diesel family 1996 E300D (W210) . .338,000 miles Wife's car 2005 E320 CDI . . 113,000 miles My car Santa Rosa population 176,762 (2022) Total. . . . . . . . . . . . 627,762 "Oh lord won't you buy me a Mercedes Benz." -- Janis Joplin, October 1, 1970 |
#11
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In my case the key slides in and out as best as you could expect.
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#12
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This started with 1986/87s. Opening any lock, including the passenger door lock,opens all locks. Do not know when or if it has ended but my 94 S350 is the same. The vacuum valves in the doors going bad gets my vote.
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N. Hodges 1994 S350 1987 300 SDL (for sale) |
#13
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The factory CD manual has a very detailed section on the central locking system of the 126 chassis cars.
I recently got my system up and running from a total non operational state. The diagrams were invaluable for diagnosing the problem areas in my system. Manual can be had here for about $20: Manual Download Hope this helps!
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____________ 1998 E300 +310,000K1996 E300 +460,000K |
#14
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Where in the manual (cd)did you see this descriptionof the problem and solution. I have the cd and have only seen the general overview.
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#15
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Quote:
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the sooner you start... the sooner you'll get done If it ain't broke, don't fix it.. Its always simpler to tell the truth... 2007 Honda Accord EX 2007 Honda Accord SE V6 96 C220 97 Explorer - Found Another Home 2000 Honda Accord V6 - Found Another Home 85 300D - Found Another Home 84 300D - Found Another Home 80 300TD - Found Another Home Previous cars: 96 Caravan 87 Camry 84 Cressida 82 Vanagon 80 Fiesta 78 Nova Ford Cortina Opel Kadet 68 Kombi Contessa |
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