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Discussion Starter · #1 ·
hellO! I have a 1991 300E and It just started to do this like 6 months ago... I lock the driver's door from the outside with the key and it locks the entire car, but then automatically unlocks itself!!! I opened the door panel and i cannot find what's wrong with it.

any help would be awesome because iwant to get a keyless entry but want to fix this first.

THANK YOUUUUU
 

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1979 450SEL (On The way), 1980 240D, 1985 300D Turbo, 1989 300E 24v, 2004 C230 Kompressor
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Uh oh.. I think we have another christine. ;) Sorry, I was tempted, I know that isn't helping haha.
 

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2003 W220 S55 AMG 2011 & Camaro RS/SS Convertible & 2011 H/D WideGlide
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kershtiiina,
The problem you are having is typical of a door lock accuator or vacuum leak in the centeral locking system. I would check the drivers side accuator as it is the most common used. They are usually cheap parts and easy to replace.

RdKing.
 

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97SL500R129, 01ML320W163, 94E320W124 & 93500EW124
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automatically unlocks itself!!!

THANK YOUUUUU
The symptom indicates that your lock/unlock circuit is shorted (or grounded) somewhere where it shouldn't be. Check/test all electrical and vacuum connection starting with with the vacuum pump, all doors and the trunk. Start with the drivers door since it is used the most.

Good luck! and please report back your findings.
 
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