Hi Soasnavas,
I have a similar annoying rear creaking noise on my 98 es300. You had mentioned changing the trailing arm bushings on the knuckle side, did u also change the bushings on the closed end side of the trailing arm? Are the bushing same for both ends? Can you please let me know and how difficult it was to change them? A mechanic told me that the knuckle has to come off and then put on a machine to remove the old bushing... do we really need to take off the knuckle to replace the bushing?

 

Has anybody tried using poly bushings on their car? I seen these:

http://www.ebay.com/itm/360765842702?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT
I am wondering if they are any good.

 

in this video you can see how the bushing is worn out
thats what causes the infamous squeak