Where is the auxiliary fan relay located in the Mercedes-Benz Viano?
2 Answers
Located under the front hood of the Mercedes-Benz Viano, inside the engine compartment of the Mercedes-Benz Viano, in the black fuse box on the left side of the Mercedes-Benz Viano engine. Function of car air conditioning: Used to adjust and control the temperature, humidity, air cleanliness, and air flow inside the car cabin to the optimal state, providing a comfortable riding environment for passengers, reducing travel fatigue, creating good working conditions for the driver, and serving as an important ventilation device for ensuring safe driving. Car air conditioning system: Generally includes refrigeration devices, heating devices, and ventilation devices. This combined system makes full use of the limited space inside the car, with a simple structure and easy operation, making it a popular modern car air conditioning system internationally.
I've been repairing cars for over a decade and have seen many issues with Mercedes Viano. The auxiliary fan relay is usually hidden in the engine compartment's fuse box. You can find a metal or plastic box under the hood, typically located near the driver's side. The box cover has diagrams or numbers, and relays starting with 'K' might be for the fan. The location varies with different Viano models, so I always recommend checking the owner's manual first. If the relay fails, the fan won't spin, and the engine can easily overheat, leading to costly long-term damage. For safety, disconnect the battery before inspection to avoid short circuits—just use a multimeter to check continuity. I've personally replaced a new relay in minutes, but those unfamiliar with electrical work should visit a professional shop. Regular circuit checks can prevent many car issues and save on repair costs.
