Okay, I have borrowed my fathers magical vehicle called MB100D, and there's some witchcraft going on in it. I wanted to put a better head unit in it, but anything else than VW Alpha (Hitachi KMS-1086V) doesn't seem to work. Well, all the other head units I tried did work, but didn't output any sound to speakers. Only the Alpha does make sound. What the hell? The car has an ISO connector sketchily installed by previous owner, so probably some wires are mixed up. I want to wire that connector properly, but a couple hours of googling didn't manage to find a wiring diagram for that kind of vehicle. I could strip the whole interior and find out by myself, but that's too much of a hassle for a single trip.
Or has anyone else tried soldering an AUX cable into the VW Alpha radio? It's easy to do so, but how to mute the radio without adding some kind of ugly external switch? I'm walking trough this shit just because radio stations in my country sucks, and I still want something to play to make trips less boring. The vehicle is really slow and makes sound of a WW1 fighter airplane, so it sets people on board asleep really fast.