I ordered some replacement power steering fluid for my '94 Cabriolet, what they sent me was Pentosin CHF 11S, made in Germany. The can has BMW and Porsche part numbers but no Audi number. Is it compatible? I don't want to screw up my system by adding the wrong fluid.....

 

That is the synthetic alternative for our B4's. The mineral-based one is Febi-Bilstein 7.1. You can mix these if you have to, but I keep them consistent. Do you know what you already have in there? Also, audiworld forums are updated more regularly by older Audi owners.

 

I have no idea what is in there now. I just bought it last year.

 

you can flush and then put the new fluid in