Do A3 2.0 Turbo Diesels have a Diverter Valve? I ask because i can hear what i think is chatter when letting the throttle off. I had this exact noice on my S3 and replacing the DV solved the problem. This is the first diesel i have ever worked on, or owned so unsure. The car feels fine with good boost. Haven't got Vag, so can't try that. If it has not got a diverter valve, any ideas what it could be? Thanks in advance..