You need QUIET to hear it. It's like a gently "motor-y" sound from the trunk. Sit in the car, turn the key on, unlock the latch and let the windows go down, and push the front of the top the required 4 inches.

NOW, hit the button - it's a quick "whirrrrrrr-ump". I suspect you WON"T hear it, I supsect some OTHER sensor is bad and stopping the process dead in it's tracks. IF you hear a whirrrrr-ump" sound (that last about as long as it takes to read that "whirrrrr-ump") and THEN you hear the beep - I'd suspect the lock is not sending back the indication that the trunk is locked. But if you hear an INSTANT beep, I'd look at the divider sensor, the trunk-closed-position-sensor or ???? Not sure what else there is!

I'd bet you it's the divider sensor. There have been at least two confirmed cases of that sensor acting up in the 16 months I've been here.

Good night all!