I'm guessing you are referring to the "Top Strut Mount", which is the large rubber device the top of your W124 front struts mount into.

I replace mine whenever I replace those shocks.

__________________
"If God had meant for us to walk, why did he give us feet that fit car pedals?" Sir Sterling Moss

Michael
2014 E63S Estate
2006 SLK55
1995 E500
1986 Porsche 944 turbo