Bird's eye view of a 2004 Audi A4 bike roof rack decked out with the Thule 400XTR Rapid Aero Car Rack System (with Thule 2114 Fit Kit), Thule 872XT Wind Fairing, Thule 518 Echelon Bike Racks and Thule 593 Wheel Holders.

Nothing like a sweet Thule Rack base system with bike racks to snaz up your Audi A4.  Here we have a 2004 Audi A4 bike roof rack system using the Thule 400XTR Rapid Aero Base Rack System (includes Thule 400 XTR Rapid Aero Foot Pack, Thule Fit Kit 2114, and Thule RB 47 Rapid Aero Bars) with the Thule 872XT wind fairing mounted to the front Rapid Aeo load bar. Also mounted to the Rapid Aero Bars, using the Thule X-Adapt 9 adapters, are two Thule 518 Ecehelon fork mounted bike trays and two Thule 593 Wheel Holders.  A Thule 596 lock pack 6 pack of locks keeps it all secure from theft. 

Complete 2004 Audi A4 roof bike rack install details.