Heating / Cooling for vehicles with fan (fluid friction coupling), excl. Radiator Fan. Type Clutch, radiator fan. AUDI A6 C5 Avant (4B5) 1.8 T Estate Petrol 12/1997 01/2005 FWD 20 150 110. AUDI A6 C5 Avant (4B5) 1.8 T Estate Petrol 04/1999 01/2005 FWD 20 180 132.