I had to "rebuild" the rubber sleeves on the rear hydroshock of my 82 300TD.
I used "Plasti-Dip", you can get it at Home Depot or Loews, etc.
It is a liquid rubber. It comes in spray and liquid. I would suggest the liquid. It's consistancy is about like heavy wallpaper paste.
I brushed on 4 heavy coats and it seems to be working quite well. It dries to a "rubber" consistancy and is flexable.

Give it a try.

I love Mercedes. I have this $5 piece on the strut that after 22 years should be worn. But Mercedes wants me to buy a new strut for $$$$$$.

Dave

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1970 220D, owned 1980-1990
1980 240D, owned 1990-1992
1982 300TD, owned 1992-1993
1986 300SDL, owned 1993-2004
1999 E300, owned 1999-2003
1982 300TD, 213,880mi, owned since Nov 18, 1991- Aug 4, 2010 SOLD
1988 560SL, 100,000mi, owned since 1995
1965 Mustang Fastback Mileage Unknown(My sons)
1983 240D, 176,000mi (My daughers) owned since 2004
2007 Honda Accord EX-L I4 auto, the new daily driver
1985 300D 264,000mi Son's new daily driver.(sold)
2008 Hyundai Tiberon. Daughters new car