Emergency key

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po55kit

New Member
Joined
Apr 13, 2015
Messages
6
Location
Cambridge/Nottingham
Car
2015 A180
I have a 2015 A class and this morning I thought it would be fun to try unlocking my car with the emergency key, just to see how it worked.

For those who don't know, the emergency key is a traditional blade style key that slide out from the bottom of the fob. I think it only present on newer keys.

Anyway, I stuck it into the key slot and twisted it clockwise only to trigger the alarm! I hope I didn't look as if I was trying to nick it! Anyway, with the fully functional fob in my hand I was able to quickly shut it up.

Why would this happen?

And - in a real emergency, how do I unlock it without triggering the alarm?
 
Perfectly normal behaviour, the blade key only unlocks the door, it doesn't disable the alarm. I believe putting the fob in the ignition silences the alarm.
 

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