I changed the alternator on my sister's 95 E320 and after installing the new one noticed the green wire conected to D+ on the alternator is dry and live, probably what damaged the old alternator.

I followed the wire and it goes into a metal tube above the tranny, in it go that wire, one from a sensor that is conected in the oil pan and a few more.

All the thin wires are dry and peeled, so trying to replace from there is a risk.

Does anyone know where they go to? how hard is it to change em?

any ideas please?