I'd tell you what it was like in my Polo '00, but I had to mutilate the sled by cutting off every extraneous wire to get it to fit into the damn dashboard (along with an existing CD headunit). Illumination sense was one of the things that had to go.

Fortunately, I purchased a spare sled before the shop closed, so all is not lost for my next install, whenever that may be!

A.