Mercedes Vito W639 OM646 Cooling Radiator Fan Shroud Cover Frame A6395051255

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 OM646 Cooling Radiator Fan Shroud Cover Frame is an original component from the Fans and fan shrouds group, designed for use in Mercedes vehicles with the OM646 engine unit. The robust construction of the shroud ensures stable airflow guidance through the radiator, which promotes even engine cooling and improves system reliability.

Specifications and technical data

• SKU: A6395051255
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6395051255
• Substitutable numbers: A6395051255, A 639 505 12 55, KD
• Category: Fan & Shroud Assemblies

Purpose and technical function

The fan shroud in Mercedes W639 models with the OM646 engine plays a key role in the proper operation of the cooling system. It is responsible for:

• directing airflow through the radiator,
• stable positioning of the fan relative to the radiator,
• reducing performance losses resulting from uncontrolled air dispersion,
• protecting the fan rotor from accidental contact with other engine compartment components.

Thanks to its proper fit to the W639 body structure and the OM646 unit, the shroud supports maintaining the optimal engine operating temperature, which translates into its durability and stability of performance parameters.

Benefits of using an original fan shroud

Using a factory fan shroud in the Mercedes W639 cooling system provides a number of practical benefits. Among the most important are:

• Precise geometric fit – the shroud is designed for a specific platform and engine, which facilitates installation and ensures proper alignment with the radiator and fan.
• Stable fan operation – proper airflow guidance reduces vibration and improves cooling efficiency in both city and highway conditions.
• Protection of adjacent components – the shroud separates the rotor from cables, electrical harnesses, and other components, reducing the risk of mechanical damage.
• Consistency with the vehicle's factory design – maintaining the original cooling system architecture facilitates subsequent diagnostics and service.

Characteristics of the used component

The presented fan shroud is a secondary market part, sourced from dismantling. This type of component is particularly attractive to users who are looking for a solution that is technically compliant with factory specifications while wanting to optimize the costs of repairing or upgrading the cooling system. A used shroud allows for the preservation of the original mounting design and air duct shape, which is important for the precisely designed engine compartments in Mercedes vehicles.

Installation and service aspects

Replacing the fan shroud in a Mercedes W639 with an OM646 engine is a standard service operation performed during cooling system repairs, frontal collisions, or radiator replacement. When selecting a part, it is worth paying attention to:

• compatibility with the specific body version and engine unit,
• the condition of the mounting points and fan guide edges,
• the absence of significant deformations affecting airflow.

Selecting the correct shroud allows for maintaining factory cooling characteristics, which is important both in daily operation and under higher thermal loads, e.g., when driving with a full load or with a trailer.

Cooling system expansion and related components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as additional fans, housings, or covers, check the available parts in the Mercedes fans and fan shrouds category.

To better understand the impact of a functional fan shroud and the entire cooling system on the durability of the engine unit at high temperatures, it is worth reading our guide "Summer heat vs. cooling system: used radiators and fans as a guarantee of savings", in which we discuss the practical aspects of operating and selecting used components.