Audi, Audi Case Studies, Car Repair and Servicing, Case Studies, Video Case StudiesAudi Case Study 16: [Video] Case Study of the Audi A6 Engine Posted on May 26, 2020November 20, 2020 by Revol Carz 26 May Have you ever wondered why the Audi A6 engine is roundish? Take a peek at the video to kill your curiosity. Revol Carz Audi Case Study 15: Resolved “Missing Coolant Issue” on Audi S5 Audi Case Study 17: Eugene’s Audi A5 Engine Overhaul