AUDI A6 AVANT 4B, C5 2.5 TDI Auxiliary Heater Heat Exchanger 4B1819011 MF0134… on July 8, 2026 July 8, 2026 4B1819011 MF013410-006. AUDI A6 AVANT 4B, C5 2.5 TDI. Land Rover. fuel type. Manual transmission 5 speed. Power: (KW/HP). No problem. Whether classic or newer vehicles.