I have noticed that the foam pieces which attach to the firewall (center-rear of the engine) have started to crumble. Does anyone know the part numbers to these attachment pieces? I looked on the startek site and could not find these pieces....Is the dealer the best bet to purchase replacements? This is for a 1995 E300 Diesel

Thanks

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2005 SL65
1999 E300
1995 E300
1994 SL320
1988 560SL
1987 300TD
1982 300D
1955 300SL