C230 Brakes

[oldestgenxer]

Maybe I did it wrong, but I did try to search and I don't see the answer. I have 99 C230 Kompressor, and I need to change the front brakes. With other cars I've always been a DIY-er, and I want to take care of this myself.
I expect odd things with different makes of cars, so I looked at it to see, and I can't tell--the bolts holding the calipers on--what are they? They look like odd, and I didn't know if it required a special tool, or am I just seeing things, because they are inside the sleeve?

I just expect the worst from past experiences. GM used to use (and maybe still does) a torx head, and that's ridiculous. An older Ford I had used shims that you had to beat out with a hammer. So I approached this cautiously, trying to figure out what I need.

And along these lines--Haynes has a great line of books to do repairs on lesser vehicles. Are there similar publications available for M-B? I'd love to have the book on der Kaiser.

Thanks for any help or sarcasm you throw my way.