Reddit reviews Metra 86-9001 Radio Removal Tool For Select 1998-2006 Volkswagen/Audi/ Mercedes

I wasn't able to use a sleeve for mine. I had to get a kit that had side install mounts. This one skips both and makes it all one piece.

This is the one I bought for mine.

As to how easy: That part was simple (if you've ever replaced a radio). Just use your keys (if you have them) to remove the old radio, plug in the kits and push it all back in. My problem came when my kit didn't match the cars kit properly. I had to modify the kit a little. This was because of the age of the original radio I think though.

edit: I thought I would include the keys I bought