I do have the remote trunk opener. When i use the remote i can hear the solenoid to release the trunk.
But when you use the latch on the driver side of the seat you don't hear any sounds, and it still unlock the trunk.

So it's probably electric for the remote opening and mechanical for the latch.

Nic.

Contour 99 MTX V6 fully loaded, stock with 110000km. Illuminated sunroof switch. About to do the mystique rear dome light conversion with eyeball dome light.