Mercedes W221 Seat Belt Lock Buckle Rail Rear Right O/S A2218600669

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W221 Seat Belt Lock Buckle Rail Rear Right O/S is an original safety system component designed for installation on the rear right side of the vehicle. Thanks to its factory-spec construction, it ensures precise fitment to the seat and proper interaction with the seat belt, resulting in stable buckle mounting. This is a solution for users who expect consistency with the factory Mercedes safety system and wish to maintain compliance with the W221 model design.

Specifications and technical data

• SKU: A2218600669
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218600669
• Substitutable numbers: A2218600669, A 221 860 06 69
• Location on the vehicle: Rear, Right
• Category: Seat Belts & Parts

Purpose and function of the component

The described seat belt buckle rail is part of the Seat belts and parts category and operates in the rear right zone of the cabin. Its task is to stably hold the seat belt buckle in the correct position relative to the seat and ensure repeatable, secure fastening. The design is adapted to the seat geometry and mounting points in the W221 model, which reduces the risk of play, incorrect belt routing angles, or uncomfortable buckle positioning for the passenger.

Fitment for Mercedes W221

The component has been designed specifically for the Mercedes W221 series, taking into account the characteristic architecture of the rear bench seat and the layout of the seat belt anchor points. The proper profiling of the rail and the correct length and angle of the buckle allow for:

• maintaining the factory ergonomics of seat belt fastening for the rear right passenger,
• proper interaction with the retractor and buckle mechanism,
• maintaining a consistent interior look in line with the Mercedes design language.

Thanks to this, installation does not require interference with the seat structure or modification of mounting points, and the whole assembly remains compliant with the vehicle manufacturer's specifications.

Technical characteristics and installation

The Mercedes W221 Seat Belt Lock Buckle Rail Rear Right O/S is prepared for operation in a specific vehicle location – rear, right side. The appropriate placement of mounting holes and the shape of the base allow for installation in the original body mounting points. In practice, this means:

• maintaining the correct belt routing geometry relative to the passenger's shoulder and hip,
• reduction of stress at mounting points during sudden braking,
• limiting the risk of belt webbing twisting during daily use.

As a safety system component, it should be installed in accordance with the service procedures provided for the W221 model, with checks on tightening torques and correct positioning relative to the seat.

Product condition and practical application

The offered seat belt buckle rail is in used condition, which allows for an economical replacement of a damaged or worn component while maintaining the original manufacturer's specifications. This solution is particularly beneficial for:

• post-accident repairs in the rear right part of the cabin,
• mechanical damage to the buckle or belt rail,
• restoring full functionality of the safety system after upholstery or seat structure interventions.

Using an original component from the same model series reduces the risk of compatibility issues and facilitates maintaining the consistency of the entire safety system.

Safety, ergonomics, and additional resources

A functional seat belt buckle rail on the rear right side has a direct impact on passenger comfort and safety – it enables quick fastening, stable buckle retention, and proper belt fit against the body. In combination with other seat belt system elements, it creates a coherent protection system, consistent with Mercedes design principles.

If you are planning a comprehensive repair or upgrade of the safety zone in your Mercedes and need other elements from the same group, such as retractors, buckles, or belt mounts, check the available parts in the Mercedes Seat belts and parts category.

When choosing between new and used safety system components, it is worth analyzing the cost-to-quality ratio – a detailed comparison can be found in the article New or used? A comparison of costs and quality of car parts, which will help you consciously choose a service strategy for your vehicle.