Mercedes W212 Rear Seat Backrest Release Handle Left N/S Lock Catch A2129209400

Mercedes W212 Rear Left Seat Latch is an original part from the Seats and Upholstery category, designed for the rear left part of the seat. This is a practical solution for users who want to restore the proper functioning of the backrest and seat locking mechanism in their Mercedes, while maintaining the factory interior design.

Specifications and technical data

• SKU: A2129209400
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2129209400
• Substitutable numbers: A2129209400, A 212 920 94 00
• Location on the vehicle: Rear, Left
• Category: Seats and Sofas

Seat Latch Purpose and Function

The rear left seat latch in the Mercedes W212 is responsible for securely locking the rear seat after it has been folded or raised. A properly functioning mechanism:

• ensures the backrest is safely held in its working position,
• eliminates unwanted play and rattles in the rear interior,
• facilitates folding and unfolding the seat in daily use.

By using an original latch, you maintain factory fit with the seat and upholstery construction, which is important for both passenger comfort and safety.

Construction and Fit for Mercedes W212

The presented latch has been designed specifically for the W212 platform, taking into account the geometry of the rear seat and the mounting points on the left side. Correct placement on the vehicle (rear, left side) guarantees:

• compatibility with factory brackets and guides,
• proper interaction with the backrest folding mechanism,
• no need for structural modifications during installation.

This allows the part to be used as a direct replacement for a damaged latch, restoring the full functionality of the rear seat without altering the vehicle's body structure.

Condition, Origin, and Benefits of Choosing a Used Part

The offered seat latch is a used part, sourced from a dismantled Mercedes vehicle. Choosing this option allows you to:

• maintain the original manufacturing quality characteristic of the brand,
• reduce repair costs compared to a new part,
• preserve the visual and technical consistency of the vehicle's interior.

For many Mercedes W212 owners, this is a sensible compromise between durability and budget, especially for interior repairs such as seats and upholstery.

Installation and Practical Service Tips

The rear left seat latch is intended for installation in the rear of the vehicle, on the driver's side. When replacing it, pay attention to:

• correct positioning of the mechanism relative to the backrest and seat,
• the condition of the cables, wires, and levers that interact with the latch,
• proper fastening of all clips and tightening of mounting points.

It is recommended that the installation be carried out by someone experienced with interior assembly in Mercedes vehicles, which will allow for full utilization of the factory latch design and avoid repeated disassembly of the seat.

Interior Expansion and Additional Information

If you are planning a more extensive interior upgrade for your Mercedes, including replacing seats, backrests, or adjustment mechanisms, it is worth checking out the guide on our blog: how to build a premium interior with used seats, steering wheels, and multimedia. You will find practical tips on selecting parts, compatibility, and installation.

If you are looking for other parts from the Seats and Upholstery category for this brand, check out our offer on Mercedes seats and upholstery to select complete solutions for your interior, maintaining stylistic and technical consistency.