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Not sure if it's possible but is there a way of locking the doors so they cannot be opened from the outside while you are in the car?

Reason I ask is that driving back from London after a Night shift just now I stopped in the Service Area for forty winks and wanted to lock car while asleep for obvious reasons.

Locking the car with the remote fob did lock doors but alarm went off shortly after as I was detected as an intruder!

Also if car is locked and fob is in proximity to car then I guess doors can be opened from outside!

Any suggestions?

paul m.

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There's a door lock switch on the door console - if you lock with that I don't think the doors will open from the outside, even if the fob is in the car.

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The above is correct and it won't trigger alarm. I always use it after getting into the car - sort of habit. Sadly could not program the car to lock itself when certain speed is reached.

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My 2003 E class Merc and my 2010 Gen3 GS 450h both lock automatically upon reaching 15 mph.

I find this feature welcome and reassuring .

Modern vehicles do not seem to incorporate this feature now ? 

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My car auto locks when you hit 15mph. And then unlocks when I put it into park. I programmed this via techstream with no issues. 

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51 minutes ago, Arqum said:

My car auto locks when you hit 15mph. And then unlocks when I put it into park. I programmed this via techstream with no issues. 

Mine does the same at 12mph, although I'm not sure it does on non imports.  I like it as it means passengers can't open the doors until I'm in park.

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Thanks gents, will check that switch for next time!

paul m.

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