An apparatus for changing the state of a vehicle closure is disclosed. The apparatus includes a primary mobile unit, a secondary mobile unit, and a detection device. The detection device is operable to automatically detect whether the primary mobile unit is within a first range of the detection device, and whether the secondary mobile unit is within a second range of the detection device. The apparatus further includes a controller operable to change the state of the vehicle closure when the detection device detects that the secondary mobile unit is within the second range while the primary mobile unit is detected within the first range.