I don’t know exactly what’s going on with my car, but it sometimes doesn’t start. I had left the radio off once over night. After that we changed the battery, because it was already so old and exhausted, that you couldn’t even bridge me. Well and now after about a month it starts again. But this time I can’t remember having left the radio on. Twice I bridged, but it happens again and again. So I tap on the Li nchtmaschine. Now to my actual question: – Which alternators fit in the Audi 90 Type89 NG frontler? – Does the 20V Q? – also fit type81 or B4 and so on – what else fits?