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Doors Auto-Unlocking while Car in Motion

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Old Jan 25, 2011 | 02:12 PM
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Doors Auto-Unlocking while Car in Motion

So I tried to do a search but couldn't find anything.

Sometimes not all the time while I am driving the door locks will seemingly unlock them selves and pop up forcing me to manually re-lock them. When this happens even if I stop and go above 9mph they stay unlocked.

Any idea of causes its a 2010 C300 4Matic, it never happened in my 2007 C230.
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Old Jan 25, 2011 | 02:17 PM
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thats strange. the only time my car had unlocked the doors while driving is when i hit massive pot holes.
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Old Jan 25, 2011 | 02:25 PM
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I hadn't thought it might be road conditions such as a pothole that could very well be it. I will have to keep that in mind when it happens again.
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Old Jan 26, 2011 | 12:47 PM
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Originally Posted by Blazeitup123
thats strange. the only time my car had unlocked the doors while driving is when i hit massive pot holes.
same here
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Old Jan 26, 2011 | 07:54 PM
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Originally Posted by icanectc
So I tried to do a search but couldn't find anything.

Sometimes not all the time while I am driving the door locks will seemingly unlock them selves and pop up forcing me to manually re-lock them. When this happens even if I stop and go above 9mph they stay unlocked.

Any idea of causes its a 2010 C300 4Matic, it never happened in my 2007 C230.
When this happens, do your 4-way flashers operate? You didn't mention that but in case of an accident over a certain G-force, the doors unlock and the flashers activate.

Your dealer will solve this for you because it's a warranty claim.
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Old Jan 26, 2011 | 08:12 PM
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Originally Posted by mr inkredibul
same here
yup same here, I just realized what that noise was, lol.
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Old Jan 30, 2011 | 05:25 PM
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my hazards don't come on (or at least I don't have to shut them off manually if they do come on and off by themselves).

In the washington DC area its pothole central and I have a heavy foot when it comes to driving I guess its my miami, fl roots lol. so speeding + potholes do not equal a happy result.

i don't know if the dealership can help only because its not a easily reproduceable problem(if it is a problem) and if they can't see it/touch it/hear it. It won't get fixed lol.
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Old Jul 2, 2011 | 03:32 PM
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This just happened to me twice driving to and from NYC everyday the last week. It seems that the doors don't unlock immediately when the pothole is hit, but rather a few seconds after the pothole. I suspect that as RLE mentioned the car thinks you are in a minor accident (which is why no airbags deployed and no hazards are flashed). And it keeps the doors locked so doors don't fly open if there happen to be subsequent crashes, and then after a safety waiting period of a few seconds (about 3-4) the doors unlock to allow you to let yourself out. Pretty cool, and DEFINITELY not something that would be in non-luxury cars that try to immitate Mercedes-Benz (Hyundai in particular).
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Old Jul 2, 2011 | 07:22 PM
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<<< Happened on massive potholes. +1



GL with the dealer visit. (If only I got a dollar for every time a dealer told me "Could not replicate problem")
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Old Jul 3, 2011 | 05:05 PM
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Originally Posted by jctevere
This just happened to me twice driving to and from NYC everyday the last week. It seems that the doors don't unlock immediately when the pothole is hit, but rather a few seconds after the pothole. I suspect that as RLE mentioned the car thinks you are in a minor accident (which is why no airbags deployed and no hazards are flashed). And it keeps the doors locked so doors don't fly open if there happen to be subsequent crashes, and then after a safety waiting period of a few seconds (about 3-4) the doors unlock to allow you to let yourself out. Pretty cool, and DEFINITELY not something that would be in non-luxury cars that try to immitate Mercedes-Benz (Hyundai in particular).
Actuallly I believe it is now U.S law(could be mistaken but I believe it is) for car manufacturers to include this feature in any new model cars. Though the years might be staggered as to when the law fully becomes effective. Currently VW's come with this feature and I believe Ford as well. Eventually this will become standard.
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