Interior alarm sensors?

Does anyone know if the e89 has interior alarm sensors?

I stupidly left my window open when I locked my car (nothing inside the car!) when I put my hand through the window , no alarm went off?!

Any ideas?
 
Does the E85 have this too, I jacked my car with the doors locked and the alarm went off.
 
Hmmm ok - so if hypothetically I locked the car with the roof down, the alarm will only go off of someone sits in the drivers seat / legs down the footwell?
 
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