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Discussion Starter #1
Hello all

I am encountering a strange problem with my 2003 C320. This just started today. I drove to my kid's school, stopped the car, got out and locked the doors with the remote. Then the car alarm went off. I noticed that the passenger side front door lock did not lock. So I unlocked the car (the alarm turned off), locked the passenger door manually, locked all other doors using the remote and the alarm went off again. I was in a bit of a hurry so I pressed the unlock button on the remote and went inside. I came out an hour later the alarm was going off again. I pressed the unlock button on the remote the alarm turned off. I drove to work and the same scenario happened. Any help or advice would be greatly appreciated before I contact the dealership. The dealers around here are not the most honest.
 

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Discussion Starter #2
Update

Here's what I did. I turned off the Automatic Security in the settings. That seemed to have fixed the alarm problem. The front passenger lock still needs to be locked manually. Last time I had this problem with my ML the dealer was going to charge me $1200 per door to fix the problem. Something about a leak in the vacuum system that lifts and pulls down the locking mechanism. I passed and said I'll use my fingers, they're free:) If anyone out there has any experience with this issue let me know if this is a DIY or should I just live with it.
 
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