Nissens 85740 Engine Cooling Fan Assembly

Engine Cooling Fan Assembly for Mercedes-Benz

Nissens 85740 is an engine cooling fan assembly built for Mercedes-Benz applications that require a 12-volt electric fan with integrated control components. It is a direct-fit cooling solution for select C-Class, E-Class, SLK, SL, CLS, GLK, B-Class, and SLC models, including vehicles with the 482 mm fan diameter specification.

Key Features

• 12-volt engine cooling fan assembly for thermal management
• Includes shroud, control unit, and regulator
• Single fan design with 7 blades
• 18.98 in. fan diameter
• 1 connector with 4-pin male terminal configuration
• Maximum output power: 810
• Built for Mercedes-Benz fitments across 2008-2020 model years

Product Details

This Nissens 85740 cooling fan assembly is engineered for vehicles that rely on an electronically controlled radiator fan to maintain stable operating temperatures. Nissens develops thermal and engine efficiency components to consistent manufacturing standards, and this assembly reflects that approach with an integrated control unit and regulator for simplified replacement of the original cooling module. It is listed for Mercedes-Benz C250, C300, C350, C63 AMG, E350, E400, E550, GLK250, GLK350, SLK250, SLK300, SLK350, SL400, CLS400, B250e, B Electric Drive, and SLC300/SLC43 AMG applications where the OE configuration matches the cataloged fitment.

This part cross-references Genuine 2049066802 for the same application.

Common Problems This Part Can Address

• Engine temperature rising at idle or in slow traffic
• Cooling fan not engaging when the engine reaches operating temperature
• Weak airflow through the radiator and condenser stack
• Fault codes related to fan motor, regulator, or control operation
• Noisy, erratic, or intermittent electric fan performance

Installation Notes and Tips

Verify the vehicle’s fan diameter, connector style, and OE part number before installation. This assembly uses a single 4-pin male connector and includes the shroud, control unit, and regulator, so the replacement should be matched to the original configuration on the vehicle. Confirm fitment carefully on Mercedes-Benz models with 482 mm fan applications, especially where year-specific notes are listed in the catalog.

Quality Assurance

Nissens positions its products around thermal-system reliability and ongoing aftermarket development. Part number 85740 is manufactured to support the cooling demands of the listed Mercedes-Benz applications and is backed by Nissens’ Genuine Nissens Quality standard.