How do you remove the radio with 6cd changer? See the four square holes on side on 2006 Mercury Mariner

Do you use them to pull it out, or do you collapse the compression brackets with them or what?
Thanks Have a cd that isn't working and think easiest thing would be to replace but need to get out first.

Asked by for the 2006 Mercury Mariner
1 answer 1 comment
You need special tools to insert into the holes to release it.
Thank you. Had that feeling. Now to find a friend that I can barrow one.