I have a 190E 1990 and it won't lock from the outside. Am I missing something or what? I can lock he doors from the passenger side, but not the drivers side. I can unlock them from the drivers side though.


Weird?!

2000 for an 190E 1990 will probably do that for you!

 

Question, when the key is inside the driver's door, are you able to turn the key?

The best advice is to take it to a dealer. If you are a DYI'er, you will need to remove the door panel. Here's two threads to get you going:

Inner Door Panel Removal DIY Links
http://www.mercedesshop.com/shopforu...d.php?t=150747

Door LOCK issues, link thread.
http://www.mercedesshop.com/shopforu....php?p=1214456