Power Steering Rack Mercedes W164 Box Electrical Pinion Gear A1644600400

Power Steering Rack Mercedes W164 Box Electrical Pinion Gear is a key component of the steering system, responsible for precisely transferring steering wheel movement to the front wheels. This assembly, featuring an electric servo mechanism and an integrated pinion gear, has been designed specifically for the Mercedes M-Class W164 generation, ensuring stable handling, predictable steering response, and comfortable power steering operation. Thanks to the use of the original Mercedes design, this component maintains the factory performance parameters of the chassis and is suitable for both routine repairs and professional vehicle restoration.

Specifications and technical data

• SKU: rhd-A1644600400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1644600400
• Substitutable numbers: A1644600400, A 164 460 04 00
• Location on the vehicle: Front
• Category: Gearboxes, Racks & Pinions

Purpose and function in the steering system

The described steering rack belongs to the Steering racks and housings group and operates in the front part of the vehicle, directly in the front axle suspension zone. Its task is to convert the rotation of the steering column into linear movement of the tie rods, which enables the wheels to turn with appropriate force and accuracy. The integrated electric power steering drive reduces driver effort during maneuvering while allowing for precise vehicle control at higher speeds.

A properly selected steering rack has a direct impact on:

• driving stability and predictable vehicle behavior,
• precision of steering response,
• comfort of maneuvering in the city and during parking,
• proper cooperation with safety systems (e.g., ESP, driver assistance systems).

Construction and technical characteristics

The steering rack uses a rack-and-pinion system with a pinion gear that works with a rack responsible for moving the steering tie rods. The use of electric power steering allows for dynamic adjustment of the steering assist force to driving conditions, which translates into more comfortable and controlled handling. The construction is prepared for installation in the front part of the subframe, maintaining factory mounting points and chassis geometry.

Thanks to the original Mercedes architecture, the steering rack maintains compatibility with factory sensors and control modules, which facilitates integration with the vehicle's existing electrical system. This solution reduces the need for additional modifications and allows for maintaining the consistency of the entire steering system.

Benefits of using an original steering rack

Using a steering rack dedicated to the Mercedes W164 brings a number of practical operational benefits:

• Factory fit – maintaining the original steering geometry and correct gear ratio characteristics.
• Consistent cooperation with vehicle electronics – proper communication with power steering control modules and safety systems.
• Stable handling – even distribution of forces to the front wheels, which improves handling confidence in corners and during braking.
• Comfort of use – smooth power steering operation, especially noticeable at low speeds and during parking.

For workshops and service centers specializing in the Mercedes brand, using such a steering rack also means easier diagnostics and the ability to use the manufacturer's standard service procedures.

Vehicle placement and installation aspects

The component operates in the front part of the vehicle, in the immediate vicinity of the front axle suspension. Such placement requires maintaining the correct sequence of installation steps, including proper geometry alignment after replacement. In practice, this means the necessity of:

• precisely setting the neutral position of the steering rack relative to the steering column,
• checking the condition of tie rods and steering ends before installation,
• performing wheel alignment after completing the work.

By following these procedures, the Power Steering Rack Mercedes W164 Box Electrical Pinion Gear allows for restoring the vehicle's original driving characteristics and ensuring predictable car behavior in daily use.

Summary

Power Steering Rack Mercedes W164 Box Electrical Pinion Gear is a solution intended for users and service centers that expect to maintain factory handling characteristics and proper cooperation with the vehicle's electronic systems. A properly selected and installed component allows for reducing play in the steering system, improving steering response, and increasing driving comfort across the full speed range.

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 steering rack housings, mounting elements, or additional system components, check the available parts in the Mercedes steering racks and housings category.