In a message dated 97-01-20 12:30:36 EST, coolidge@nicom.com (George S Achorn
III) writes:
<< Also  Audi has taken to using the yellow on the BTCC A4 cars.
    Note Biela's rear view mirrors. >>
Each Audi driver uses a different color outside rear view mirror.  It helps
to tell them apart at speed.