Mercedes W204 W212 Power Steering Pump Hydraulic Unit 4Matic A0064664801

Mercedes W204 W212 Power Steering Pump Hydraulic Unit 4Matic is an original steering system component designed for vehicles with 4Matic all-wheel drive and the M272 petrol engine. Thanks to its factory design, it ensures stable system pressure, precise power assistance, and predictable vehicle behavior during daily operation. This is a solution for users who expect consistent steering system performance and the maintenance of parameters in accordance with the manufacturer's standards.

Specifications and technical data

• SKU: A0064664401
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0064664401
• Substitutable numbers: A0064664401, A 006 466 44 01
• Fuel type: Petrol
• Category: Power Steering Pumps

Purpose and technical characteristics

The presented pump belongs to the Power steering pumps category and is dedicated to Mercedes W204 and W212 class models equipped with 4Matic drive and the M272 petrol engine. The hydraulic design ensures a constant supply of fluid to the steering system at the appropriate pressure, which translates into smooth steering wheel rotation, predictable response to driver inputs, and driving comfort both in the city and at higher speeds.

The pump works with a fuel system based on a petrol engine, which is important when selecting accompanying components (hoses, fluid reservoir, steering gear). Using an original design allows for maintaining factory operating parameters, reducing noise, and minimizing the risk of vibrations on the steering wheel.

Benefits of using an original power steering pump

Using a dedicated power steering pump in a Mercedes W204 or W212 with 4Matic drive brings a number of practical benefits:

• maintaining factory steering force characteristics and steering wheel resistance,
• stable operation of the hydraulic system across a wide temperature range,
• better compatibility with the steering gear and other system components,
• reducing the risk of premature wear of other steering system components.

The original pump from this group is designed for the specific loads resulting from the 4Matic drive, which is significant during dynamic driving and in conditions of increased system load (e.g., driving with a fully loaded vehicle). For the user, this means more predictable handling and a lower risk of power steering malfunction.

Condition, selection, and installation

The item comes from a used vehicle and is offered as a pre-owned part, which allows for an economical repair of the steering system while maintaining the original design. Pump selection should be based on the OEM part number and interchangeable numbers to ensure full compatibility with the specific engine and drive version of the vehicle. Proper fitment translates into correct hose geometry, appropriate mounting, and correct operating pressure parameters.

Before installation, it is recommended to:

• check the tightness of the power steering hoses and connectors,
• replace the fluid with fresh fluid that meets the vehicle manufacturer's specifications,
• bleed the system after installation to avoid cavitation and operating noise.

This approach allows you to fully utilize the pump's potential and reduce the risk of needing further system interventions shortly after the repair.

Integration with the fuel system and operation

In vehicles with the M272 petrol engine, it is crucial that all components working with the power unit – including hydraulic elements – are selected in accordance with technical documentation. A properly functioning power steering pump relieves the driver during maneuvering while not excessively loading the engine, which is important for fuel consumption and the overall refinement of the power unit.

If you want to deepen your knowledge regarding the selection and operation of components working with a petrol engine, including diagnostics and regeneration principles, the following article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration. You will find practical tips there regarding the interpretation of OEM markings and the principles of proper component maintenance.

Expanding Mercedes steering system repairs

If you are planning a comprehensive repair or upgrade of the steering system area in your Mercedes and need other elements from the same group, such as additional pumps, hydraulic hoses, or steering gears, check the available parts in the Mercedes power steering pumps category.