W124 Doors re-lock themselves

[richip]

My 1996 E320 Cabriolet has developed an issue where, having unlocked the doors with either the remote or key, the doors re-lock themselves after a short period.

My local independent has checked the vacuum pump and hoses and can't find a leak.

I'm wondering if a faulty door/boot/fuel cap actuator is telling the others to re-lock. Any help would be much appreciated.

 

[Naraic]

If the sensor does not know the door has been opened after you have unlocked it...it will re-lock as it would do if you hadn't opened the door.

Is there a switch in the handle or lock which isn't making contact...the light switch?

 

[richip]

Not thought of that. I do know that the belt butlers correctly sense when the doors are open or closed. Would that be the same sensor?

 

[Naraic]

Don't know...but it would seem likely.

 

[television]

All the mercedes that I know of will re lock if the drivers door is not opened after using the remote.

 

[star]

Look closely at door lock buttons, one may not be fully rising so causing the car to re lock.

 

[richip]

The doors re-lock regardless of whether the door is opened or not.

I'll check if all the buttons fully rise. If one is staying low what would that indicate?

 

[star]

Sticking button/mechanism or a vac cell leak.

 

[richip]

Thanks.

 

[richip]

Found that the passenger door button was sticking occasionally. I'll investigate this week and let you know the outcome.