We are stumped: A member of the Audi family is requesting assistance in assessing the availability of a service/owners manual for a 1990 Audi V8 Quattro. This production model was very limited; therefore, parts and literature are hard to obtain. Any information on a reputable supplier would kindly be appreciated. Cristina Denault, AudiSport USA One Audi Plaza Box 12273 Tucson, Arizona 85723