83 19 1 165 917 is the fuel additive.....that we shouldn't use.
lubrizol 6178 part number 83 29 0 434 684 ,is the additive we don't have to put on our power steering with atf oil...
83 29 0 422 194 is the zf additive for auto transmission 6 hp26 .
I can't find the grease for our hardtop , so someone could do some diy job ....
Francesco
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