I placed a picture of the lining in one of the Mercedes brand sway bar bushing liners. It appears to be a fabric that most likely is the teflon liner mentioned in the workshop manual.

If you want to see a picture, go to:

http://www.peachparts.com/shopforum/diesel-discussion/415062-w124-1995-e300d-some-part-s-other-info-front-suspension.html#post4212281