C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Door Auto Lock/Unlock Information request

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Old Dec 15, 2020 | 05:13 AM
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sikander3786's Avatar
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W203
Door Auto Lock/Unlock Information request

Hi.

My car is W203 C180 2006 model.

When doors are locked from control panel, pulling any of the door opening levers from inside of the car, on any of the doors, results in unlocking of that door.

Is it a by-design feature or it some problem with my car?

I mean, isn't it supposed to keep the doors locked unless the driver unlocks the doors? That's how it used to work on my old Honda and that's why I am confused.

For the safety of my children I am using child lock but it would be handy to just use the auto locking feature if possbile.

Thanks.
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Old Dec 15, 2020 | 12:20 PM
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I assume you're referring to the interior door handles. The doors are designed to do that. In fact, every German car I've sat in does that, though in BMWs the handle has to be pulled twice (first pull unlocks, 2nd pull opens). If anything, personally I find it super convenient. Not sure about the sedan, but on the coupe I also can't lock the door while it's open. The pin won't push down.

I know what you mean with the old school car doors staying locked despite pulling on the handle. Pretty sure they got rid of it for safety reasons.

Last edited by slammer111; Dec 15, 2020 at 12:24 PM.
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Old Dec 15, 2020 | 06:55 PM
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Also a note on safety of children, the electric windows in my car are not child friendly - the windows will go up ignoring any obstacle in the way (100% happens on the rear right hand side, but ive not tested the others). I assumed we would have that protection (increased current draw detected and window auto rolls down) or was my door lock/window control unit broken?
So the window disable switch for the rear passengers can be a life saver
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Old Dec 16, 2020 | 03:27 AM
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In all modern cars the windows can't be closed by pushing down on the button. The switches have to be moved or pulled upwards instead, which means some kid or dog can't step on the switch and strangle itself.

MBs do have the high current auto open feature on the windows but I've noticed that the force required to trigger it is rather high. Of course the tradeoff is to have windows that trigger too often, which would lead to customer complaints.
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Old Dec 16, 2020 | 08:26 PM
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W203 (2007), W120 (1962)
Originally Posted by sikander3786
Hi.

My car is W203 C180 2006 model.

When doors are locked from control panel, pulling any of the door opening levers from inside of the car, on any of the doors, results in unlocking of that door.

Is it a by-design feature or it some problem with my car?

I mean, isn't it supposed to keep the doors locked unless the driver unlocks the doors? That's how it used to work on my old Honda and that's why I am confused.

For the safety of my children I am using child lock but it would be handy to just use the auto locking feature if possbile.

Thanks.
Yes, it is by design. In case of an emergency, anyone in the car, at the front or the back should be able to open the door from inside to get out of the car. If you do not want the rear doors to be opened from inside, you have to engage the child lock button on the rear doors. Similarly, if you don't want your children to play with winding and unwinding the rear windows, you can press down the control switch in the main switch panel.
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