Yes, you got it right - you guys there in US, at least in past, got Audis one year later than whole europe. C3 ended in 1990 and C4 started in 1991, B3 began with 1987. model year in september 1986 etc. I have to keep that in mind when using Mitchell On Demand schematics from one russian webpage, because these are US car schematics, so models changed year later and engine range also is noticeably smaller.
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