Ailing vehicle:
1983 Ur Quattro
...
The ECU (newer "F" part; older MAC-02 is part number 035-905-383B,
newer "Version 2" ECU is 035-905-383F, and it works just fine in the
older UrQs) is available from Linda@Carlsen's for around $1300. I'm
Correction, price was $1,120, not $1,300... (well, the checksum of the
digits was right at least!)
-RDH