Fitment: 2010-2015 Mercedes-Benz Sprinter 2500 2010-2015 Mercedes-Benz Sprinter 3500 Package Content: 1 x Blower motor resistor The function of A/C Heater Blower Motor Resistor : Ensure the blower is operating properly. Whether the AC blower resistor is damaged: 1. The speed cannot be adjusted, the blower motor has only one speed. 2. Various airflow settings do not work. 3. There is no air in the vents. Attention: *Professional Installation is Highly Recommended. *If you have any questions about the product, you can contact us at any time. .