Mercedes-Benz W204 Front Right O/S Seat Memory Control Unit Module A2048209485

Mercedes-Benz W204 Front Right O/S Seat Memory Control Unit Module is a specialized, factory-original seat memory control module for the front right passenger seat, designed for Mercedes W204 class models. As part of the Electronic control modules and controllers group, it is responsible for precise seat setting management, ensuring comfort, position repeatability, and consistent operation with the vehicle's other electronic systems. This used OEM component is a sensible choice for those seeking a technically matched solution while maintaining cost-effective repair options.

Specifications and technical data

• SKU: rhd-A2048209485
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2048209485
• Substitutable numbers: A2048209485, A 204 820 94 85, KZ
• Location on the vehicle: Front, Right
• Category: ECUs & Computer Modules

Function and application of the seat memory module

The presented control module is responsible for operating the memory function of the front right seat in the Mercedes W204. It integrates signals from adjustment buttons, position sensors, and the electrical wiring, saving and recalling selected seat positions. This allows the user to quickly restore preferred settings without the need for manual adjustment every time.

The module works with the vehicle's electrical system in a sequential manner, controlling, among other things, longitudinal movement, backrest angle, or seat height (depending on the specific car configuration). Proper matching to the Mercedes W204 electrical architecture reduces the risk of communication errors in the vehicle network and facilitates diagnostics if needed.

Benefits of using an original Mercedes module

Using an original module from the Electronic control modules and controllers group to replace a damaged unit helps maintain the consistency of the comfort system in the cabin. You receive a component designed specifically to work with the Mercedes electrical system, which translates into:

• proper communication with other controllers in the vehicle,
• stable operation of the front right seat memory function,
• reduced risk of software conflicts compared to universal replacements,
• easier diagnostics using factory service tools.

A used OEM module is also a way to maintain the vehicle's original specifications while reducing costs compared to purchasing a new part.

Selection, installation, and compatibility

To ensure proper operation, the module should be selected based on the equipment version and seat configuration of the specific Mercedes W204. In practice, this means verifying compatibility against manufacturer markings and comparing it with the currently installed unit. In many cases, installation is close to plug-and-play, although the final scope of work depends on the specific car and any potential need for system adaptation.

When replacing, it is recommended to:

• check the condition of connectors and the wiring harness before installation,
• follow the correct procedure for disconnecting and connecting the battery,
• perform a functional test of the seat after completion of work,
• if necessary – perform computer diagnostics to clear any error codes.

For users who want to deepen their knowledge on the selection and installation of used controllers, the Global Parts guide will be useful: Used automotive electronics – how to safely choose modules and controllers, which discusses issues such as compatibility, manufacturer markings, and practical application examples.

Area of application in the vehicle

The module is designed to operate in the front part of the cabin, on the right side. It is responsible for handling seat comfort functions in this specific location, which is why its correct placement and connection to the vehicle's wiring is crucial for the operation of the memory settings. Proper orientation and installation according to the factory diagram reduce the risk of mechanical damage and interference in electronic operation.

Expanding the comfort system in your Mercedes

If you are planning a comprehensive repair or upgrade of the seat comfort zone in your Mercedes and need other elements from the same group, such as adjustment controllers, heating modules, or seat memory management units, check the available parts in the Mercedes electronic control modules and controllers category.