Mystery Auto door locks
Thread Starter
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,105
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From: Toronto, Canada
2019 C300 Wagon; '75 Triumph TR6; previous: 2004 C230 6spd sold after 17 years of driving
Mystery Auto door locks
I understand that the car automatically locks while underway ~18km/hr, my question is when I stop and turn off the car and open the doors what should happen?
Sometimes, as I open my drivers door from inside it unlocks all the doors and other times it just unlocks the drivers door.
What is normal? Am I having a lock malfunction when it just unlocks my door?
Sometimes, as I open my drivers door from inside it unlocks all the doors and other times it just unlocks the drivers door.
What is normal? Am I having a lock malfunction when it just unlocks my door?
Senior Member
Joined: Jan 2006
Posts: 491
Likes: 1
From: Redding, California
AMG GTS
I understand that the car automatically locks while underway ~18km/hr, my question is when I stop and turn off the car and open the doors what should happen?
Sometimes, as I open my drivers door from inside it unlocks all the doors and other times it just unlocks the drivers door.
What is normal? Am I having a lock malfunction when it just unlocks my door?
Sometimes, as I open my drivers door from inside it unlocks all the doors and other times it just unlocks the drivers door.
What is normal? Am I having a lock malfunction when it just unlocks my door?
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Joined: Nov 2001
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From: SonicMS/SF Krew
'08 BMW e92 335i
I understand that the car automatically locks while underway ~18km/hr, my question is when I stop and turn off the car and open the doors what should happen?
Sometimes, as I open my drivers door from inside it unlocks all the doors and other times it just unlocks the drivers door.
What is normal? Am I having a lock malfunction when it just unlocks my door?
Sometimes, as I open my drivers door from inside it unlocks all the doors and other times it just unlocks the drivers door.
What is normal? Am I having a lock malfunction when it just unlocks my door?
Thread Starter
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,105
Likes: 11
From: Toronto, Canada
2019 C300 Wagon; '75 Triumph TR6; previous: 2004 C230 6spd sold after 17 years of driving
I will try the 'opening the door slowly' vs 'opening the door quickly' and see if that makes a difference
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Joined: Nov 2001
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From: SonicMS/SF Krew
'08 BMW e92 335i
If you read my explaination I am NOT talking about the remote fob, what I am talking about is: driving my car the doors automatically lock; it is when I decide to turn off the car and get out that is when the differences are.
I will try the 'opening the door slowly' vs 'opening the door quickly' and see if that makes a difference
I will try the 'opening the door slowly' vs 'opening the door quickly' and see if that makes a difference
Last edited by phattbam; Feb 27, 2007 at 11:23 PM.
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Joined: Aug 2006
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From: SoCal, Irvine
Stage 2 C7 A6, QX60
It's not a malfunction. Completely normal. Most people open their locked doors quickly so it unlocks all the doors as you open the driver's door. But in my experience if you open your driver's door extra slow (while all the doors are locked) it will ONLY unlock driver's side...I think this is a convenience feature..I'm sure you can tell how it is...just imagine your kids in the backseat or something and you wanna get out quickly, yet only unlocking your door. My explanation might be incorrect though...can someone verify? But I am positive you are not experiencing any lock malfunction here.
cause everytime I open the door, it unlocks all 4, but i always open it very quick
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Joined: Mar 2006
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From: SF Bay Area, CA
2006 E55 and 2002 E320
I DID READ YOUR explanation.. Ok I'll explain it.. if you have your key fob set to unlock just your driver door and that's the ONLY door that unlocked when you get into your car.. when you start to drive the doors will automatically lock (that's only if you have this enabled). When you decide to park your car and want to open YOUR door only, it will automatically unlock all the doors that you have initially unlocked during that session. for example I am the only one who needed to get into the car, MY key unlocks just MY door. so when I shut my car down and open my door it will only unlock that door. Should I have passengers, I will press my unlock button again to unlock all doors. So when then whenever ANY of the two FRONT individuals decide to open their doors it will unlock ALL 4 doors.. that's how MY car is... I read your post and I'm just stating how my car works.. I've been the original owner of my car for the last 6 years, that's how mine has always been. No matter how fast I try to open the door or how slow I do it, that's how it works. but that's MY car.
The car "remembers" if any other doors were opened or not. So say you're walking to your car with your luggage and you unlock all of the doors because you want to put said luggage in the rear seat. The car remembers that the rear door was opened and upon opening your driver's door upon exit, it will unlock all of them. It does depend if you have your remote transmitter programmed to "Selective unlocking" or "Global unlocking". If you have your transmitter set to "Global unlocking" the car will always unlock all the doors.
Note, say you made a stop in your trip and you dropped someone off which required the opening of one or more doors. Now, you have the car to yourself. Even upon exiting, still all the doors will unlock.
Always, no matter what, if the front passenger opens his door under 3MPH, all car doors will unlock if they haven't already.
Last edited by patrick_y; Feb 28, 2007 at 12:31 AM.
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Joined: Feb 2007
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From: Downtown Columbus
w211 e500
I DID READ YOUR explanation.. Ok I'll explain it.. if you have your key fob set to unlock just your driver door and that's the ONLY door that unlocked when you get into your car.. when you start to drive the doors will automatically lock (that's only if you have this enabled). When you decide to park your car and want to open YOUR door only, it will automatically unlock all the doors that you have initially unlocked during that session. for example I am the only one who needed to get into the car, MY key unlocks just MY door. so when I shut my car down and open my door it will only unlock that door. Should I have passengers, I will press my unlock button again to unlock all doors. So when then whenever ANY of the two FRONT individuals decide to open their doors it will unlock ALL 4 doors.. that's how MY car is... I read your post and I'm just stating how my car works.. I've been the original owner of my car for the last 6 years, that's how mine has always been. No matter how fast I try to open the door or how slow I do it, that's how it works. but that's MY car.
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Thread Starter
MBWorld Fanatic!
Joined: Dec 2006
Posts: 1,105
Likes: 11
From: Toronto, Canada
2019 C300 Wagon; '75 Triumph TR6; previous: 2004 C230 6spd sold after 17 years of driving
I DID READ YOUR explanation.. Ok I'll explain it.. if you have your key fob set to unlock just your driver door and that's the ONLY door that unlocked when you get into your car.. when you start to drive the doors will automatically lock (that's only if you have this enabled). When you decide to park your car and want to open YOUR door only, it will automatically unlock all the doors that you have initially unlocked during that session. for example I am the only one who needed to get into the car, MY key unlocks just MY door. so when I shut my car down and open my door it will only unlock that door. Should I have passengers, I will press my unlock button again to unlock all doors. So when then whenever ANY of the two FRONT individuals decide to open their doors it will unlock ALL 4 doors.. that's how MY car is... I read your post and I'm just stating how my car works.. I've been the original owner of my car for the last 6 years, that's how mine has always been. No matter how fast I try to open the door or how slow I do it, that's how it works. but that's MY car.
Thanks for the advice, it all makes sense and somewhat explains the global locking. I guess I never realized that I pressed the locks twice to get in and when I noticed all were opening from inside sometimes and other times only my door. Never did put 2 and 2 together.
Guess this is why the forum exists, to sometimes ask stupid questions that we may not figure out.
My key fob is now set to 'global unlocking'
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From: SonicMS/SF Krew
'08 BMW e92 335i
there are never really stupid questions.. It's just sometimes people don't want to help by explaining what the issue at hand may be, but instead recommend for you to read the manual. I'm glad you sorted things out.. enjoy the car.. there's other cool things too. like the recirculation button.. it can roll up your windows AKA "tunnel mode"..
