The Haynes W123 Diesel volume has Euro and US wiring diagrams. There might be a copy at your library.

I'm curious, which is the way it should be? IIRC Euro corners are darker amber and don't have a trailing reflective section. Whether the lamp has a standing light is determined by the socket and bulb. Tail lights are also different with Euro cars not having a reflective and illuminated red leading edge.

Sixto
83 300SD
98 E320 wagon