Mercedes W221 Seat Belt Rear Centre Middle Seatbelt Buckle Black A2218604385

The Mercedes W221 Rear Center Seat Belt Buckle is an original part from the Seat Belts and Parts category, designed for installation on the rear bench seat in W221 S-Class models. Its black color and factory construction ensure a cohesive interior appearance and proper compatibility with the factory seat belt for the middle seat.

Specifications and technical data

• SKU: A2218604385
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218604385
• Substitutable numbers: A2218604385, A 221 860 43 85
• Location on the vehicle: Rear
• Color: Black
• Category: Seat Belts & Parts

Vehicle Application and Function

The presented Mercedes W221 Rear Center Seat Belt Buckle is a component installed on the rear bench seat, serving the middle seating position. It is responsible for the secure fastening of the seat belt, which is crucial for passenger safety and compliance with vehicle homologation requirements.

Its placement in the rear cabin means the component operates in close proximity to the seat cushion and backrest, therefore its proper functioning affects:

• stable retention of the belt buckle during driving and in emergency situations,
• correct belt routing relative to the passenger's body,
• maintaining the factory safety level for the middle seat on the rear bench.

Construction, Color, and Fitment

The part is finished in black, which matches the standard interior color scheme of most W221 S-Class vehicles. This ensures that after installation, the visual consistency of the upholstery and trim is maintained without the need for additional modifications.

As a part of the Seat Belts and Parts group, the buckle is designed to work with the factory center seat belt, providing:

• a compatible buckle receptacle matched to the original belt tongue,
• appropriate mounting geometry relative to the rear bench seat structure,
• preservation of the manufacturer-intended fastening position, which is important for the operation of passive safety systems.

Usage Characteristics and Condition

The offered buckle is a used part, sourced from disassembly, which allows for the preservation of the original OEM specification while optimizing repair costs. A used component of this type is often chosen for:

• post-accident repairs of the rear bench seat and seat belt system,
• rectifying seat belt buckle mechanism faults (e.g., problems with buckle locking or release),
• restoring the completeness of equipment for the middle seat on the rear bench.

The factory construction of the buckle ensures the maintenance of operating parameters intended by the vehicle manufacturer, which is important both from a safety perspective and for regulatory compliance.

Why Choose an Original Rear Center Seat Belt Buckle

Choosing an original rear center seat belt buckle for the Mercedes W221 helps avoid problems typical of aftermarket replacements of uncertain origin. Using this part offers:

• maintaining the factory safety standard for the middle seat on the rear bench,
• a precise fit to the seat structure without modifications or custom fabrication of mounts,
• a cohesive interior appearance thanks to the black color matching the original finish.

This solution is particularly recommended for professional bodywork and mechanical repairs, as well as for owners who wish to maintain their S-Class vehicle in a configuration close to its factory state.

Other Mercedes Seat Belts and Parts

If you are also looking for other Mercedes seat belts and parts, check out the dedicated category: Mercedes Seat Belts and Parts. This will help you easily select compatible safety system components for your model, maintaining brand and specification consistency.

Technical Knowledge and Selection of Used Parts

When sourcing used components for safety and drivetrain systems, it is beneficial to know the basic principles of assessing their condition. Practical tips for selecting parts from the secondary market can be found in the guide: Used Differentials – What You Should Know About Used Differentials, Sensors, and Drivetrain Systems. This is a helpful source of knowledge when planning comprehensive repairs and vehicle upgrades.