Driver Side Door Lock Issue
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Joined: Nov 2013
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2009 R350
Driver Side Door Lock Issue
When I went inside the home last night after locking my 2009 R350, my wife reminded me that I had forgotten to grab a grocery bag from the car. I rush back out, and sure enough, I don't have my keys with me. In the meanwhile, I simply pulled the driver's side door handle, and the door opened! I took the keys from home, locked the car, and if I pull the door handle on the driver's side a couple times, the door opens! The others do not, but the driver's side door is open.
When I get in the car and try to use the central lock, I notice pins on all of the doors move down and up, and the doors do lock. Is this the dreaded door actuator failing? I can't open any other doors, and all of them appear to lock and unlock properly from the inside. It's only the driver's door, which I can open by pulling the handle a few times despite the fact that the car is locked.
When I get in the car and try to use the central lock, I notice pins on all of the doors move down and up, and the doors do lock. Is this the dreaded door actuator failing? I can't open any other doors, and all of them appear to lock and unlock properly from the inside. It's only the driver's door, which I can open by pulling the handle a few times despite the fact that the car is locked.
MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,086
Likes: 443
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
Have you utilised the emergency key in your key fob? If so, you may need to return the key barrell back to its "locked" position. The constant pulling of the door handle is how you unlock the car using the key when you're battery goes flat etc. Its possible someone has used it and not returned the barrell to the lock position
Thread Starter
Newbie
Joined: Nov 2013
Posts: 3
Likes: 0
2009 R350
Have you utilised the emergency key in your key fob? If so, you may need to return the key barrell back to its "locked" position. The constant pulling of the door handle is how you unlock the car using the key when you're battery goes flat etc. Its possible someone has used it and not returned the barrell to the lock position
MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,086
Likes: 443
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
Thread Starter
Newbie
Joined: Nov 2013
Posts: 3
Likes: 0
2009 R350
To add it to this, if I just rely on remote keys then the knob moves and lock or unlock the car. The problem is, if I pull driver side door handle few times, it will unlock!
MBWorld Fanatic!
Joined: Jun 2014
Posts: 1,086
Likes: 443
From: Melbourne, Australia
2010 ML550 VIN WDC1641722A564750, 2010 B180
You won't feel any resistance - it doesn't unlock the locking mechanism in a conventional sense like in other or older cars. Its more like a switch. It just allows a locked door to be opened by pulling quickly on the handle a few times. So you won't see the locking mecahnism move when you turn the key. The barrell should be in the upright (vertical) position in normal circumstances and horizontal position when you're trying ro access it in emergency situations. Make sure thats the case and if it still won't lock with the fob, then there's a different problem
Last edited by BlackML550; Apr 21, 2023 at 03:31 AM.
