Mercedes W204 Front Right O/S Backrest Unlocking Mechanism Electric Adjuster

Mercedes W204 Front Right O/S Backrest Unlocking Mechanism Electric Adjusteris an original seat system component, responsible for securely holding and controlling the adjustment of the front passenger side backrest. Thanks to its factory design intended for a specific generation of Mercedes, it ensures proper cooperation with the rails, seat frame, and adjustment system, restoring the seat's correct functionality. This is a practical solution for users who want to technically restore the backrest locking operation without interfering with the seat structure.

Specifications and technical data

• SKU: A2048701651
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2048701651
• Substitutable numbers: A2048701651, A 204 870 16 51
• Location on the vehicle: Front, Right
• Category: Additional Seat Parts

Function and application of the mechanism

The presented mechanism is the component responsible for locking and releasing the front right seat backrest, which is crucial for passenger safety and comfort. It works in a system with seat levers and cables, allowing for stable maintenance of the selected backrest position and its controlled reclining, in accordance with the seat design in the Mercedes W204.

Its placement in the front-right area of the vehicle allows for precise fitting to the passenger seat without the need to modify the frame or mounts. The mechanism is designed to work with the factory adjustment system, which facilitates installation and reduces the risk of improper lock operation.

Construction and technical compatibility

The backrest locking adjustment mechanism is designed as a dedicated component of the Mercedes seat system, ensuring compatibility with the seat geometry, mounting points, and backrest range of motion. The design provides for cooperation with factory control elements (levers, knobs, or cables depending on the seat version), which allows for maintaining the original operating ergonomics.

As a part from the Other seat parts group, this mechanism performs a specialized function in the seat structure, responsible for proper engagement and unlocking of the backrest. Using an original solution reduces the risk of play, improper backrest locking, or premature wear of adjacent structural elements.

Benefits of using the original mechanism

Using this component in a Mercedes W204 allows you to:

• restore the proper operation of the front right seat backrest lock,
• maintain the factory geometry and backrest adjustment range,
• minimize the risk of uncontrolled backrest movement while driving,
• maintain the structural integrity of the entire seat without modifications.

For users who care about the technical correctness of the repair, it is important that the original mechanism works with existing mounting points and the adjustment system, which translates into predictable seat behavior in daily use.

Condition, verification, and practical application

The offered mechanism comes from a vehicle in which it was previously used, which allows it to be treated as a proven service solution for users looking for parts to repair the seat system. In practice, this is a beneficial option for interior renovation, eliminating play in the backrest, or restoring full functionality to the passenger seat on the right side.

In the case of vehicles from years close to youngtimers, such as the Mercedes W204, the use of appropriately selected used components allows for an economical refresh of the interior while maintaining the original specification. More practical tips on using used parts in the renovation of cars of this class can be found in the article The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years.

Expansion and other Mercedes seat system components

If you are planning a comprehensive repair or upgrade of the seat area in your Mercedes and need other elements from the same group, such as seat rails, backrest frames, or additional adjustment mechanisms, check the available parts in the Other Mercedes seat parts category.

By using components from the same construction group, you can consistently renew the seat system, improving ergonomics, adjustment functionality, and overall passenger comfort, while maintaining the interior character typical of the Mercedes W204.