Canada? Then Blackmercedes might be able to help. He's in Canada, though his C230 was/is a '98, I *think*.

In any case, I was pleased to find out my car didn't have FSS when I bought it, since to take full advantage of FSS, you need to use synthetic oil. (Of course you can always use dino and change sooner than FSS recommends.)
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__________________
* *
-- Paul W. (The Benzadmiral)
('03 Buick Park Avenue, charcoal/cream)
Formerly:
'97 C230, smoke silver/parchment; '86 420SEL, anthracite/light grey; '84 280CE (W123), dark blue/palomino