Brake Pads?

How hard is it to change your own pads on a 300E? I read the DIY articale on the E420. Dosn't seem too hard and i just hate spending $150 on 2 pads at the shop.

I was talking to my old Shop Teacher and he said you need a feeler gauge to check to correct space, but that doesn't seem to be in the DIY E420 section. Maybe hes just used to his old American/Japaneese Cars.

This is a skill that I feel I need to know, becasue it seems so easy and i want to learn how to do it.

Need any special tools? Is the only new thing you need are pads? that is if your discs are all scratched up.

Thanks in Advance