Mercedes W177 W247 Electric Power Steering Rack Drive Motor Unit A2479008708

The Mercedes W177 W247 Electric Power Steering Motor is an original steering system component designed to work with the gearbox in Mercedes compact class vehicles. As part of the Steering Gears and Housings group, it is responsible for precisely transferring the power assist torque to the steering rack, ensuring stable handling and predictable steering system response. The used drive module is a functional service solution for vehicles equipped with electric power steering.

Specifications and technical data

• SKU: A2479008708
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2479008708
• Substitutable numbers: A2479008708, A 247 900 87 08
• Category: Gearboxes, Racks & Pinions

Application and Function in the Steering System

The presented electric drive works with the steering gear in models from the W177 and W247 families, where the power assist is fully electric. The module generates the appropriate torque, which is transferred to the wheels through the steering gear, resulting in light yet predictable steering wheel operation.

A properly selected power steering motor is crucial for:

• maintaining a stable driving path at higher speeds,
• precise maneuvering at low speeds,
• proper cooperation with safety systems, such as lane assist or stability control systems.

Benefits of Using an Original Power Steering Motor

An original electric steering system drive ensures the retention of factory operating parameters. This provides the driver with consistent, predictable vehicle responses, and the steering system remains calibrated according to the manufacturer's specifications. Factory fitment reduces the risk of incorrect interaction with the vehicle's electronics and minimizes the need for additional installation modifications.

Choosing a used, original component from this group allows for:

• maintaining compatibility with the existing steering gear,
• reducing repair costs compared to a new component,
• maintaining the correct operation of power assist systems and driver assistants.

Installation and Service Characteristics

The electric power steering motor is structurally designed for integration with the steering gear in a specific body type. Proper adaptation to a specific vehicle generation simplifies the installation process and reduces the time required for service work. Before installation, it is recommended to verify compatibility with the vehicle based on technical data and steering system configuration.

In workshop practice, it is also important to:

• check the mechanical condition of the steering gear before installing the drive,
• ensure correct electrical connection and perform any necessary adaptation procedures in the control units,
• check the system's operation after installation – including power assist force and steering wheel response.

Mercedes Steering Gears and Housings – Expansion and Modernization

If you are planning a comprehensive repair or modernization of the steering system area in your Mercedes and need other components from the same group, such as complete steering gears, housings, or additional power assist modules, check the available parts in the Mercedes Steering Gears and Housings category.

Technical Support and Knowledge of Used Components

When selecting used drive system components and their associated parts, it is advisable to rely on reliable technical information and proven diagnostic procedures. A sensible choice of used parts can reduce service costs while maintaining an appropriate level of reliability for the entire system.

To better understand the specifics of drivetrain components and related sensors, it is helpful to consult practical guides – the article Used Differentials – What You Should Know About Used Differentials, Sensors, and Drivetrain Systems, which discusses key aspects of technical condition assessment and informed parts selection, can be helpful.