did you check the D.I.Y. section on this site?
fronts are easy, buy new pad springs and hex bolt, MB anti-squeal paste, you'll need torque figures,

no spindel nut involved with front brake work, if your thinking about packing your bearings it is a very precise job needing special tools

Haynes does make a manual for euro four and diesel engines that would be helpful for the work your doing.