2009 GL450 Front Door Lock/Unlock Problem
#1
2009 GL450 Front Door Lock/Unlock Problem
The front driver door will not lock/unlock electronically, meaning key fob, exterior handle touch (Keyless Go), interior buttons, or the autolock while driving will not actuate the driver door bullet plunger. All of the other door plungers will actuate (lock/unlock) as expected with any of the aforementioned methods, just not happening with the driver door. Pulling on the interior handle will raise the bullet plunger up and unlock successfully so the manual mechanism part works. Tried to used the key that's attached to the remote to manually lock/unlock the door and it was too difficult to turn and I didn't want to break the key inside the keyhole.
A Mercedes service dealer mentioned that the likely part that needs changing is the door latch mechanism.
Anyone have a test method to determine this type of issue?
Thanks in advance for the help!
A Mercedes service dealer mentioned that the likely part that needs changing is the door latch mechanism.
Anyone have a test method to determine this type of issue?
Thanks in advance for the help!
Last edited by tongster; 04-26-2016 at 12:55 PM.
#2
This is a common issue on most cars.. the actuator controlling the auto door unlock. It maybe just a broken spring.. I know this probably taboo but another forum goes into this issue in detail.
http://www.benzworld.org/forums/w164...pair-kits.html
Here is a video on replacing the spring
https://www.google.com/url?sa=t&rct=...VjEt_ExuFKBx7g
http://www.benzworld.org/forums/w164...pair-kits.html
Here is a video on replacing the spring
https://www.google.com/url?sa=t&rct=...VjEt_ExuFKBx7g
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StradaRedlands (01-12-2017)
#3
Thanks for the suggestion Carlosrg. I've had the broken spring issue on my ML320 where the plunger goes frantically up and down (aka machine gun) and this issue with my GL450 doesn't do anything close to that. The plunger simply doesn't move unless manually actuated or using the interior door handle with plunger is down. Going to open the door panel this weekend and any other suggestions is much appreciated.
#4
There's no sound coming from the door motor when pushing the buttons. I've taken the door panel apart and removed the internal panel that holds the latch. I'm told by the dealer that the latch is the part that typically needs to be replaced. Anyone else have had this problem resolved? The spring for the plunger/latch is still in perfect condition.
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#8
The actuator comes as the entire thing unfortunately. I got a used unit and replaced it for $200 if I remember correctly. Mercedes parts are ridiculously over priced for the garbage quality they are. I would suggest you shop around online or even get quotes from NAPA auto parts, Autozone, etc. Don't pay $500 for some garbage that will likely fail down the line again.
#9
The actuator comes as the entire thing unfortunately. I got a used unit and replaced it for $200 if I remember correctly. Mercedes parts are ridiculously over priced for the garbage quality they are. I would suggest you shop around online or even get quotes from NAPA auto parts, Autozone, etc. Don't pay $500 for some garbage that will likely fail down the line again.
https://mbworld.org/forums/gl-class-...epair-0-a.html