The Visco clutch is tasked with making the frictional connection to the fan wheel and it influences the speed of the wheel depending on the temperature. There, a wear-free fluid friction is used to transfer the drive torque to the fan wheel. The electrically driven Visco clutch is controlled directly by sensors. Cooling to match requirements improves the level of coolant temperature, engine noise and also fuel consumption.Behr Hella Service - Engine Cooling and Air Conditioning for Passenger Cars and Heavy Duty Trucks. With more than 1000 quality parts,Behr Hella Service offers a wide range for European cars and Heavy Duty Trucks. Our customers benefit from the combined expertise of BEHR and HELLA. Over 100 years of technical knowledge, quality focus and unparalleled service. This means, an ideal combination of products and service for your business. HELLA's Sales organization plus BEHR's extensive OE product knowledge form Behr Hella Service.