In Stu Ritter's new E-Class Owner's Bible there is a write-up describing how to install Euro lights. I got the impression that there were only two options concerning the wipers. Either change to the Euro wipers or eliminate them. The total parts cost including Euro wipers was around $700.
Is it possible to use the US wipers with Euro lights? Even if they didn't work quite as well as they might, I'd be happy with some function at the possibility of reduced conversion cost.
BTW, Stu's book has the parts list for the conversion to Euro lights. I wished I'd made this conversion a long time ago.