Mercedes W212 Rear Seat Folding Backrest Right O/S Lock Catch Handle A2129209500

Right rear seat backrest lock with handle for Mercedes W212 is an original component of the backrest folding mechanism, designed for installation on the right side of the rear seat. This component from the Seats and benches category ensures secure backrest locking and convenient latch release, contributing to safe and functional use of the rear cabin.

Specifications and technical data

• SKU: A2129209500-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129209500
• Substitutable numbers: A2129209500, A 212 920 95 00
• Location on the vehicle: Rear, Right
• Category: Seats and Sofas

Purpose and Function in the Rear Seat System

The presented lock with handle is dedicated to the rear, right side of the backrest in the Mercedes E-Class W212 generation. It is responsible for the mechanical locking of the backrest in its working position and its release during folding, which is crucial for passenger safety and luggage stability.

The element works in conjunction with the backrest structure and the release mechanism, enabling smooth transitions between the locked and folded positions. This ensures the full functionality of the rear seat – both in passenger configuration and when expanding the luggage space.

Construction and Technical Features

The lock with handle has been designed as an OEM Mercedes part, meaning it fits factory mounting points and is compatible with the backrest geometry. The construction combines a lock body and an ergonomic handle, which allows for convenient latch release from inside the vehicle.

Key technical features include:

• dedicated placement in the vehicle: rear, right side of the backrest,
• integration with the rear seat backrest folding mechanism,
• factory fit for the seat and bench structure in Mercedes W212,
• preservation of original operating ergonomics for rear seat passengers.

Benefits of Using an Original Backrest Lock

Using an original lock with handle in a Mercedes W212 allows for the restoration of the correct operation of the backrest folding mechanism without the need for seat structure modifications. In practice, this means:

• stable backrest locking while driving,
• secure support for passenger and luggage loads,
• convenient and repeatable latch release when folding the backrest,
• maintenance of a cohesive interior appearance and functionality according to Mercedes standards.

This component from the Seats and benches category is particularly important for repairs after mechanical damage, replacement of worn-out parts, or completing missing components in the rear seat.

Condition, Fitment, and Practical Application

The offered lock with handle comes from a used vehicle, which allows for maintaining factory compatibility with the rear seat structure in the Mercedes W212. Due to its original origin, the part works with existing mounting elements and the folding mechanism, facilitating installation and reducing the risk of fitment issues.

This solution is suitable for both standard replacement of a damaged lock and for comprehensive interior renovation, where maintaining the technical and visual consistency of the rear seat is important.

Interior Modernization Expansion and Additional Resources

If you are planning a comprehensive repair or modernization of the rear seat area in your Mercedes and need other elements from the same group, such as backrests, seats, or adjustment mechanisms, check the available parts in the Mercedes Seats and benches category.

When planning a broader improvement of cabin comfort and appearance, it is worth familiarizing yourself with a guide that discusses the selection of used interior components, their installation, and practical aspects – details can be found in the article Premium Interior for Half the Price: Used Seats, Steering Wheels, and Multimedia.