If the refrigeration fan in the Mercedes E-Class (W211) operates continuously, it means that one of the contacts will be permanently closed. The source of the problem can be either a sensor or a fan control unit, or a wiring-circuitable circuit.
In Mercedes E-Class W211 the electronic control unit is inserted into the fan, so in the event of a failure, they change together. The cost of this kit is not the smallest, so it is better to send the car to diagnostics so that specialists can determine the cause of the malfunction.
