The best way to achieve this is to get 4 ramps and 4 jack stands unless you have a lift or a drive on lift w/ hydraulic jacks. Put your E in the air.
Front: loosen lower control arm bushings and top strut bolt.
Rear: loosen lower control arm at subframe, both trailing arm bolts and camber arm at subframe.
Set car down slowly onto each ramp(I use old 15" rims off a astro van laying flat, works the best).
Get into your E and sit in each seat, go slow. Also sit on the tailgate. Each spot sit for a minute or 2. Note: if your using rims, you can bounce a little.
Go get lunch to let it sit an hour or more.
Now, tighen all bolts to factory specs.
Enjoy.
This is how I have done it on every car I have ever lowered or lifted and have never, and I mean never have gotten a squeak or rattle.
Any questions, just ask.
Steve
Addition: your alignment may be out afterwards, so I cannot be held responsible for that with the above directions.