On a 124, to remove the door lock, you shouldn't need to remove the door panel. Simply pop off two rubber caps in the door jamb (one to access the set screw and the other to access the alarm connection). Pull the alarm connection out (white plug) and then back the 3mm allen out the entire way and remove. You should then be able to insert the key into the lock tumbler, turn it 60 degrees to the right (if memory serves me correctly), press in to unlatch the detent and pull the lock assembly out separately from the exterior handle. Installation is reverse of removal. Hope this helps!


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Rgds,
Aaron Greenberg
MB technician
Precision Motorcars, Cincinnati, Ohio
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