Downloading csv via make

Hello, when trying to download a csv document via make, all german characters show up in the downloaded data as a black questionmark. When trying to convert the encoding to ISO-8859-3 for example the questionmark gets replaced by a semikolon. Im guessing the data for the characters dont get downloaded or smth. Does anybody have an idea how to fix that.

ermm, would u mind showing us the Makefile?