a4, need advice, 97 a4, any need to start rust control (krown)??

Just inquireing on some audi advice, I'm a new audi convert, just purchased an older a4 with 108km's, asking advice if rust control would be worth while on these, I find using krown rust control on my previous car really helped eleminate that problem and also kept other components lubbed and protected...any advice would be appreciated...best wishes.

I'm not sure about the 97's...but I know the later models had galvanized body panels...so there shouldnt be a need...

thanks :)