One mean looking body structure once you peel the skin from the Audi A8. The Audi Space Frame (ASF) is exceptionally strong but substantially lighter than a metal chassis. Safety, performance and handling are all enhanced through the careful hand-welding of magnesium and aluminium panels.
The lower A-pillar (the large red part where the front door hinges wound be) is one of 25 castings in the body structure that interconnect the longitudinal member, the sill, the omega cross-member, the windshield crossmember, the roof frame and the suspension strut mount.
The lateral roof frame is formed by a single extruded section. This changes the cross-section flexibly from the A-pillar to the C-pillar.