A really green DIY should not be doing the things listed below. Even an experienced mechanic should have the Factory Shop manual with him when doing these things.. as MB does a lot of things different from the usual... and not knowing that can cause accidents.
Have you shopped around any with regards to shops ? Usually there is some place which can do a good job at less than the dealership....


idler arm repair *
steering shock *
lower ball joints & upper *
left / right tie rods - turns both front wheels *
center link *
break strut bushing *
both flex disc *
parking brake adjusted* (loose)
fuel lines - does this mean metal lines or rubber ?
alignment
engine mounts (2x) *
engine vibration damper (2x) *
two brake calibers *