I rebuilt everything in the front end of my 300 SEl about two years ago. You will need a special tool to press in the lower ball joints. You can rent one from Performance Products (an aftermarket parts supply house). You can purchase a universal spring comp. The old lower ball joints need to be pressed or driven out. You acn make up a rig for removing the old and pressing in the new upper and lower control arm bushings (a drill press comes in handy for this). I bought all MB parts from Tom Hansen (MB dealer in L A) for around $500. It is doable but not easy allow a week if you do it after work each day.