Potsmadots

Hi all,

Incredibly d'oh query here; I've seen and know how to remove an Audi factory stereo, however my car came fitted with an aftermarket head unit and dash kit. I want to get in there and change it, but not sure how to get the unit out/where the release points would be.

Pictures attached; would anybody happen to have any idea how to get in to this/get this apart to get the head unit out? If it's of any relevance, the front of the unit currently installed does not open/is not removable.

Thanks in advance