AUDI 420820037A, 4F0819031B. Core Length 144 mm. AUDI A6 C6 (4F2) 2.0 TDI Saloon Diesel 07/2004 10/2008 FWD 16 140 103. AUDI A6 C6 Avant (4F5) 2.0 TDI Estate Diesel 09/2005 06/2006 FWD 16 121 89. AUDI A6 C6 Avant (4F5) 3.0 TDI quattro Estate Diesel 10/2008 08/2011 AWD 24 240 176.