It is a bummer when you get your new parts but it is really just too cold to put them on!
With sway bar bushings, be sure the car is on the ground and level before you tighten the bushing cap holders. This way you avoid any preloads.
I would say the same holds true for the rear shocker's lower bolts.
If you are going to wait on the front shock mounts, they are not too hard to replace separately. You simply leave the front wheel on, unbolt the three mount bolts and the center shock nut, jack up the car enough to compress the shock and get the mount off.
Installation is just the reverse with the added pain of collapsing the shock enough to get the shock mount on top of it before it wants to extend.
'03 E320 Wagon-Sold
'95 E320 Wagon-Went to Ex
'93 190E 2.6-Wrecked
'91 300E-Went to Ex
'65 911 Coupe (#302580)