AudiNewsRieGerTuners Audi A4 3.0 TDI by Rieger tuning keshy Posted onMay 5, 2008 at 4:10 AM 6 Comments Among the first to jump onto the A4(B8) tuning scene is Rieger Tuning; with their latest creation for the A4 3.0 TDI, so rejoice owners cause this turned out to be a screamer on a mission.