Has anyone here experienced a very loud grinding/rattling sound as the latch motor is closing the latch when you close the trunk using the power lift gate button? I notice that usually when you press the button, the trunk will drop down, then you can distinctly hear a two-part closing cycle that both sound like the motor whirring and doing something. On other Model S vehicles that I tried, they sound like your typical motor whirring sounds. But on my 2012 CPO, the first cycle motor sound is ok, but the second cycle motor sound is a loud grinding/rattling noise, as if something is loose or the motor is going bad. I asked a service advisor to take a listen but he claimed it was normal, but I seriously think something is wrong. So wondering if anyone else has experienced this noise issue?