GL Class (X164) 2007-2012: GL320CDI, GL420CDI, GL450, GL550

rear driver side door lock won't lock, 2007 GL450

Old Feb 13, 2024 | 11:45 AM
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2007 GL450
rear driver side door lock won't lock, 2007 GL450

All other three door locks work fine.
The Rear Left door lock won't lock, with car key remote or with door lock button.
When pressing lock/unlock button, the black stick of RL at window sill will pop up and down, same as other three door locks, but the RL door can be opened by pulling exterior handle, which will trigger car alarm (door opened while supposedly locked).
Does this mean a bad actuator? anyway to fix it? thanks a lot,

Last edited by texas008; Feb 13, 2024 at 12:06 PM.
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Old Feb 13, 2024 | 01:02 PM
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NGL450 w/EORP, S550
Probably. Mine is the same way, i just manually lock it and don't use that door much.
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Old Feb 13, 2024 | 01:08 PM
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2007 GL450
Originally Posted by Max Blast
Probably. Mine is the same way, i just manually lock it and don't use that door much.
thanks for the note, wonder how to manually lock it after exiting the car, by turning the mechanical key in the key hole on the exterior door handle? thanks again.
there is a video on Youtube on how to replacing the lock actuator, and the author has replaced 3 out of the 4 door actuators on his 2009 GL450.
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Old Feb 13, 2024 | 05:01 PM
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From: Emmett, ID, USA
2007 GL450
Originally Posted by texas008
thanks for the note, wonder how to manually lock it after exiting the car, by turning the mechanical key in the key hole on the exterior door handle? thanks again.
there is a video on Youtube on how to replacing the lock actuator, and the author has replaced 3 out of the 4 door actuators on his 2009 GL450.
Not knowing what the "lock actuator" is, I guess that what you need to fix is the thing that disengages the outside handle from the latch.
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Old Feb 14, 2024 | 09:18 AM
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NGL450 w/EORP, S550
Originally Posted by texas008
thanks for the note, wonder how to manually lock it after exiting the car, by turning the mechanical key in the key hole on the exterior door handle? thanks again.
there is a video on Youtube on how to replacing the lock actuator, and the author has replaced 3 out of the 4 door actuators on his 2009 GL450.
just push the lock pin down with the door closed.
central locking will not be able to change the doors lock status and it will remain locked.

i had been parking in some sketch places for years until I discovered the door wasn’t locking but luckily, no soup kitchens to report

or one could take it apart to see which rod or lever has come off I spose

Last edited by Max Blast; Feb 14, 2024 at 01:29 PM.
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