Hello… Have a question…. Who of you owns or knows someone who drives a pre-production vehicle of the Audi A4…? Explanation: I am looking for information about an Audi 80 quattro of type 81/85 with self-locking (gates) differentials. How many of the vehicles were there? Are there still some? If there are any, who has seen one or who has one? The vehicles have no switch for the locks… since torsen differential…. Who has infos??? Greeting