from what im told the locks on the car are vacuum lines, perhaps your vacuum isn't working or the lines have popped off.
The motor for the unlock button must be bad. Or the cable is not connect properly. Hope this will help you.
It should lock when you lock your doors.
doors locks & trunk lock not working
There are a couple of things that can cause your Mercedes-Benz driver door lock control to malfunction. The most common cause is a malfunctioning?ædoor lock relay switch.
Lock on driver frot side is not working
My hard top latch lock is broken just the lock latch can I just buy the lock unit
Check the fuse, if power lock fuse is burnt, replace it.
Mercedes window wont go up
mercedes are a european rubbish design on their ignitiopn key the make it for money not quality
This happened to me on my 2002 and I had to have it towed for service. I had the mechanic on the Mercedes road side assistance on the line and he told me that even if he came out to meet me it would need to go to the shop. It is a form of shift lock but there is no button to release it like on most vehicles. In the end they had to replace my keyless go control on the shifter.
why dont my 2001 windstar van lx door locks wont lock
You just have to sit on the middle bit of the seat, it will then lock :)