Engine Code: CNHA. AUDI A6 C7 (4G2, 4GC) 2.0 TDI Saloon Diesel 03/2011 09/2018 FWD 16 177 130. AUDI A6 C7 (4G2, 4GC) 2.0 TDI Saloon Diesel 11/2013 09/2018 FWD 16 190 140. AUDI A6 C7 (4G2, 4GC) 2.0 TDI quattro Saloon Diesel 04/2015 09/2018 AWD 16 190 140.