I finally pulled one of the headrest out of my 2010 R/T, so now I know a little better on how these things work. The headrest does not have any high tech methods of being attached to the seats, they just use the little indents like a regular headrest to go up and down. There is a wire that runs inside the chrome tube that goes into the plastic box on the back side of the headrest, this activates the unit when you are rear ended (not sure if its explosives or a motor that pushes the padding forward). Your headrest should not go up or down automatically unless you have a loose clip and gravity allows it fall lower into the seat.
On a side note, does anyone know how to bypass the active headrest sensor so the airbag light doesn't come on? I measured 2.5 ohm resistance, so I will try a resistor in the plug, but any help or suggestions would be appreciated.
