Audi A4 (02-08) Haynes Repair Manual (Does not include information specific to diesel engine, S4 or RS4 model information. Includes thorough vehicle coverage apart from the specific exclusion noted): Haynes, Max: 9781563928376:
Amazon.com: K&N Cold Air Intake Kit: High Performance, Increase Horsepower: Compatible with 2009-2013 Audi (A4, A4 Cabriolet, A4 Quattro) 2.0L L4, 69-9505T : Automotive
Amazon.com: Dual Radiator and Condenser Fan Assembly - Pacific Best Inc. Compatible/Replacement for AU3115107 02-05 Audi A4/S4 1.8L, 05-08 GEN 3/RS4 2.0L, 03-06 Cabriolet 1.8L, 07-09 Cabriolet 2.0L : Automotive
Audi A4 cabriolet Cleaned & Sealed - YouTube
2007 Audi A4 Cabriolet Owners Manual Factory Set: Amazon.com: Books