Has anyone replaced their valve stem seals with the VICTOR REINZ brand? The cost is 1/4 of the MB OEM for me. Or should I only use OEM for this repair?

Here is a distributor link:
www.victorreinz.com

Here is some more info:
http://www.engineparts.com/products/ghome.htm

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1989 300CE Astralsilber/Schwarz
1992 300CE Schwarz/Schwarz