Nissens 85739 Engine Cooling Fan Assembly

OE-Style Cooling for Mercedes-Benz Applications

Nissens 85739 is an engine cooling fan assembly built for stable airflow and consistent thermal control in Mercedes-Benz vehicles. It uses OE-quality control electronics and a 12-volt design to support safe, reliable operation in demanding cooling systems.

Compatible with Mercedes-Benz R350, ML350, ML450, ML550, R320, ML500, and R500 applications, this assembly is a direct-fit cooling solution for vehicles that require a 600-watt fan with integrated control unit and shroud.

Key Features

• OE equivalent engine cooling fan assembly from Nissens
• 12-volt electrical system with 600-watt output
• Integrated control unit included for OE-style operation
• Shroud included for proper airflow management
• 7-blade fan design with 18.98-inch fan diameter
• 1 connector, 4-pin male terminal configuration
• Built to meet ISO 7637, ISO 16750, and EMC requirements

Detailed Product Overview

Nissens part number 85739 is engineered as an OEM equivalent engine cooling fan assembly for Mercedes-Benz models that use the specified 600-watt cooling setup. The assembly includes the control box and reengineered electronics to support safe operation and compliance with OE electrical requirements. Nissens also states that its fan assemblies conform to ISO 7637, ISO 16750, and Electromagnetic Compatibility standards, which is important for vehicles with sensitive onboard electronics. This part cross-references Mercedes-Benz OE numbers 1645000193 and A1645000193 for the same application.

What This Part Helps Address

• Engine overheating caused by a weak or failed cooling fan
• Inconsistent fan operation from control module or electronics issues
• Reduced airflow through the radiator and condenser area
• Cooling system performance loss in Mercedes-Benz R350 and ML-Class vehicles
• Electrical compatibility problems with OE-style fan control systems

Installation Notes and Tips

Verify the vehicle’s original fan assembly specifications before installation, including 12-volt operation, 600-watt rating, connector style, and shroud configuration. Confirm fitment for the exact Mercedes-Benz model and year listed for your application, including R350 2006-2012, ML350 2006-2011, ML450 2010-2011, ML550 2008-2011, R320 2007-2009, ML500 2006-2007, and R500 2006-2007. Check connector pin count and terminal gender against the original unit before connecting the harness.

Quality Assurance

Nissens cooling fan assemblies are built around OE-quality control electronics and validated against recognized electrical and electromagnetic standards. That focus on controlled operation and long-life performance supports dependable replacement quality for Mercedes-Benz cooling system service.