Hello, unfortunately I couldn’t find anything useful in the search… Have C4 with “normal” DEs and nem Xenon retrofit kit in it! Did I finally want to install original Xenon! What solutions would there be now? And for which models were there even the Xenon, only in the S4 and in the S6 (Plus)??? Did I actually have Bi-Xenon in the Audi back then? Do I have to change the headlights completely, or would it be enough if I changed “only” ECUs, burners and disk? the D2S/D2R burner in??? Have you read where one of the xenons of the VW W8 built in + TÜV?!*hui* P.S. I am grateful for any help and will then also set up a complete conversion report… WITH photos!!! THX @ all