And, those mitchell on demand schematics are american schematics, which means that 1993 Audi 90 is the same as european 1992 Audi 80 and also no TDI schematics, only 2.8 for B4 and 2.0 8v and 2.3 10v for B3, but in any case rest of the stuff remains the same

I'm using only these schematics and so far I've only found once or twice different wire color than in those schematics.