platt-deutsch

Wife closed trunk in 2012 S550. Problem is she hit the lock button by mistake and then hit the close trunk button. Lucky I had mechanical key in my billfold.

Jason B

Hmm, that shouldn't happen. See the video I made:


If the keys are in the car, you can't lock it.

alx

lol... this should not happen.

i think one of your rear keyless go antennas is gone so the car did not sense the key in the trunk

those antennas- they do fail and can be troubleshot via das

Bill-W221

or the battery on the key fob is dead.

platt-deutsch

The keys were in the Car not in the trunk. The Lock button right next to the trunk closing button locked all the doors and then she shut the trunk and all was locked up tight.

sblvro

Do you have mbrace? You can unlock it with your phone

platt-deutsch

Yes I have Mbrace but just got it and haven't checked out what it will do.. I will do that soon. I still didn't think it should have locked the doors with the keys inside..

Bill-W221

If it was a KG car you would be able to just touch the door handle to unlock ? I'm asking as I don't really know, I've only had mine a few weeks.

Nuru

I inadvertently hit both the trunk close and lock buttons while closing the trunk and my key was inside the car and I got an alarm and a reminder to remove my key - seems there was an interesting malfunction

Jason B

Correct, it works the same way as my trunk video. You can't lock the keys in the car, if they are IN IT. Something is wrong.

BenzV12

May be there was a second key fob in her purse or pocket and it locked that way . There is no way you can close and lock the car with a keyfob is in the car .
I recently discovered something, I left one of the fobs inside the car and I was able to lock the car with other keyfob was in my pocket .

platt-deutsch

That's exactly what happened. Wife had purse in hand and the other set was in the cupholder in the car.

Jason B

Interesting. I'm trying to think of how that could be beneficial some way. If one key is inside, could you have the car running and be able to lock it from outside when no one is in it???

alaskas550

it can be done I have 2007 S550

BenzV12

Thanks for this confirmation

You can have the car running and driving away with other fob that is in your pocket while your default fob is in the car .It may sound weird but none of the fobs cancel each other or interferes their signals
I tested it , you can lock it from outside providing that one of the fobs is in your hands, pocket, bag whatever .If two fob is inside or only one fob is nearby you can not lock the car .

platt-deutsch

For emergency would it work to take the battery out of a remote and hide it in the car. Then you could enter the car with your mechanical key and insert the smartkey in the ignition and still enter the car and start it .