Drivers door keeps unlocking
Thread Starter
Member
Joined: May 2008
Posts: 223
Likes: 35
merdeces s320
Drivers door keeps unlocking
I have a 2008 CLK convertible
When I'm sitting in the car, every 5 seconds I can hear the lock clicking. The clicking is the lock actually trying to unlock
If I lock the car from inside, 5 seconds later the drivers door unlocks on its own. If I lock the car from outside, 5 seconds later the drivers door unlocks on its own.
I do have DAS softare which shows no errors in the ignition or door control modules
The only clue it gives is when checking ACTUAL VALUES in the left door module. Its shows SIGNAL CENTRAL LOCKING as NOT OPERATED, then every 5 seconds (along with the dreaded click) the signal changes to OPEN for about a second
Any pointers on where to start looking for the cause of this please?
When I'm sitting in the car, every 5 seconds I can hear the lock clicking. The clicking is the lock actually trying to unlock
If I lock the car from inside, 5 seconds later the drivers door unlocks on its own. If I lock the car from outside, 5 seconds later the drivers door unlocks on its own.
I do have DAS softare which shows no errors in the ignition or door control modules
The only clue it gives is when checking ACTUAL VALUES in the left door module. Its shows SIGNAL CENTRAL LOCKING as NOT OPERATED, then every 5 seconds (along with the dreaded click) the signal changes to OPEN for about a second
Any pointers on where to start looking for the cause of this please?
Junior Member
Joined: Sep 2020
Posts: 55
Likes: 8
From: Portugal, in the countryside
CLK (W209) 270Cdi 2003
I think it just did...
"...when checking ACTUAL VALUES in the left door module. Its shows SIGNAL CENTRAL LOCKING as NOT OPERATED, then ..."
What do the *other* door modules show, when they are closed and open? More specifically, do they also show "NOT OPERATED" when open? Or do they show "OPEN", or something else?
If I'm right, this value should be either OPEN or CLOSED. Showing "NOT OPERATED" may mean that the door lock, when in closed position, is not transmiting the signal that it is "OPEN" to the locking system.
In that case, I would remove the door card, and try to shower the lock with WD40, while locking and unlocking it manually, and watching the ACTUAL VALUES for it.
Then again, I might be wrong. This is largely guesswork, since I never had issues with the door locks on my CLK. Good luck, and let us know how it goes.
"...when checking ACTUAL VALUES in the left door module. Its shows SIGNAL CENTRAL LOCKING as NOT OPERATED, then ..."
What do the *other* door modules show, when they are closed and open? More specifically, do they also show "NOT OPERATED" when open? Or do they show "OPEN", or something else?
If I'm right, this value should be either OPEN or CLOSED. Showing "NOT OPERATED" may mean that the door lock, when in closed position, is not transmiting the signal that it is "OPEN" to the locking system.
In that case, I would remove the door card, and try to shower the lock with WD40, while locking and unlocking it manually, and watching the ACTUAL VALUES for it.
Then again, I might be wrong. This is largely guesswork, since I never had issues with the door locks on my CLK. Good luck, and let us know how it goes.
Newbie
Joined: Jun 2024
Posts: 1
Likes: 0
CLK320
Did you ever manage to fix your issue? Im running into the same problem and dont know what to do. We checked it for error codes with a Mercedes inspection tool and it doesnt show any errors on the driver door. It just keep trying to open every 5 seconds like yours did. Only my passenger door control unit isnt reachable by the software, but passenger door suprisingly everything works. Even the keyless entry, window and the seat controls. On the drivers door however it keeps doing the unlocking thing every 5 seconds. Everything works, apart from the keyless door handle features, which up until now wasnt a problem for me as I can just unlock and lock it with the key which Im used to from other cars anyway. It locks and unlocks normally through the keyless on the passenger door, the lock button on in the center console and the keyfob. Also tried locking it with the mechanical key, but it keeps unlocking. After disconnecting the battery the problem goes away, but returns over night.
