The complete list of Audi A4 B8 problems, in great detail, is only on Lifeonfour. Check it out before buying your Audi.
Audi A4 Buyer's Guide (1996-2016) - AudiWorld
Audi A4 vs S4 – Which Should I Buy? – Nick's Car Blog
Audi A4 B8 common problems (2008-2016)
B7 Audi Buyers Guide: 2005.5-2008 Audi A4, S4, RS4 – Nick's Car Blog
Audi S4 (B8) PH Used Buying Guide - PistonHeads UK
10 of the most common problems with the Audi A5 - BreakerLink Blog
2008-2016 Audi A4 2.0T Reliability In 2021
Audi A4 B8 common problems (2008-2016)
Audi A4 Buyers' Guide (2008-2015)
Used Audi A4 Saloon (2008 - 2015) Review