Clicking sound when turning off the car and taking out the key MK6 GTI

[Maverick]

Then what does the "AC" button on the climate controls do?

Turns the AC on and off however the AC compressor is a variable controlled unit that has no clutch and always runs at a minimum 2%.

Sanden PXE16 Air Conditioner Compressor Specifications (1K0820803)

The AC system has a climate control to run it and you can't fully disable it like you can with a manual system.

[yyn]

Yesterday as I sat in my car with the ignition turned off I realise that my seat is making a clicking/ticking sound every time I take a breath and exhale. It's the weirdest thing.