2015 Audi A3 Body Structure and Safety Systems in Extrication, Special Operations, Training July 12, 2014 Comments Off on 2015 Audi A3 Body Structure and Safety Systems The 2015 Audi A3 uses many hot-shaped steel parts in the passenger compartment for low weight and maximum strength, while the engine hood is made of aluminum. 2015 Models Airbag Audi BIW Body Structure Emergency Response Guide Extrication Firefighter Vehicle Extrication 2014-07-12 Smitty