Mercedes S204 W204 Backrest Lock Folding Rear Seat Left Right N/O/S A2049230132

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes S204 W204 Backrest Lock Folding Rear Seat Left Right is an original mounting component designed for locking and releasing the rear seat backrest in C-Class models. Thanks to its precise fit to factory mounting points, it ensures stable backrest support and reliable operation of the folding mechanism on both sides of the vehicle. This is a practical solution for users who want to restore the proper functionality of the rear seat without modifications or the need to adjust aftermarket replacements.

Specifications and technical data

• SKU: A2049230132
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2049230132
• Substitutable numbers: A2049230132, A 204 923 01 32
• Location on the vehicle: Rear, Right, Left
• Category: Additional Seat Parts

Purpose and function of the backrest lock

The rear seat backrest lock is responsible for securely locking the backrest after it is raised and for controlled release when folding. This component operates in the rear interior, on the right or left side, working in conjunction with the adjustment mechanism and backrest hinges. A properly functioning lock:

• maintains the backrest in a stable position while driving,
• prevents the backrest from falling down uncontrollably,
• enables convenient folding of the seat to increase cargo space,
• contributes to the comfort and safety of passengers and cargo.

Thanks to its factory design, the lock works with original guides and catches, which translates into reliable operation of the folding mechanism without play or jamming.

Body compatibility and positioning

The presented lock was designed for the C-Class W204/S204 estate and sedan body styles, where the rear seat serves both as a passenger seat and as part of the trunk expansion system. The component can work on either the right or left side, which facilitates part selection when repairing a specific mounting point. This solution allows you to:

• maintain the consistency of the rear seat structure,
• reduce disassembly and assembly time,
• avoid issues with matching the backrest geometry to the body.

Its location in the rear interior means the lock is exposed to mechanical stress and frequent use, which is why using an original component is crucial for the durability of the entire system.

Characteristics of the original Mercedes part

As an item from the Other seat parts group, the rear seat backrest lock is structurally matched to the factory seat frame and upholstery. Original manufacturing ensures:

• compliance with factory assembly tolerances,
• proper cooperation with the backrest release mechanism,
• adequate rigidity and resistance to repeated folding cycles.

A used OEM component is a sensible choice for drivers who expect to maintain factory functionality without the need for interior modifications. This allows you to restore the proper operation of the seat while preserving the original character of the vehicle.

Why choose a used OEM part

Using a used backrest lock from original production allows you to reduce repair costs while maintaining high-quality fitment. Unlike many aftermarket replacements, the OEM component retains:

• factory geometry of mating surfaces,
• compatibility with stock guides and catches,
• visual consistency with other interior components.

If you want to better understand how to effectively use second-hand elements for modifications and repairs, the article The best used parts for tuning your car will be helpful, as it shows a practical approach to selecting used components.

Additionally, when deciding between an original part and a replacement, it is worth reading the guide 5 reasons why a used OEM part is a better choice than a replacement, where specific selection criteria are discussed using examples of popular models.

Expanding seat area repairs in your Mercedes

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 guides, mounts, or additional catches, check out the available parts in the Other Mercedes seat parts category.

Summary

Mercedes S204 W204 Backrest Lock Folding Rear Seat Left Right is a practical, original mounting component that allows you to restore the proper operation of the rear seat folding mechanism on the right or left side of the vehicle. Thanks to its factory fit to the seat structure and compatibility with other interior components, it provides a functional service solution for users expecting secure locking and convenient backrest release in daily use.