1) Start with the front balljoints. Symptoms match best with this.
2) Next, suspect the idler arm bushings.
3) play in front hubs
4) play in the various balljoints in the steering rack
5) rear links
6) alignment- lowering throws off the camber. Bigger tires throws off the toe.
This is really not a symptom of worn swaybar bushings.
Best of luck.
1986 300E 5-Speed 240k mi.