Mercedes-Benz W204 W207 Front Right O/S Seat Belt Buckle Tensioner A2078601869

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes-Benz W204 W207 Front Right O/S Seat Belt Buckle Tensioner is an original component from the Seat belts and parts group, designed for installation on the front passenger side. It enables the seat belt to be fastened correctly, ensuring a stable connection with the retractor mechanism and the Mercedes vehicle safety systems.

Specifications and technical data

• SKU: A2078601869
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2078601869
• Substitutable numbers: A2078601869, A 207 860 18 69, A2078601469, A 207 860 14 69
• Location on the vehicle: Front, Right
• Category: Seat Belts & Parts

Purpose and function of the seat belt buckle

The presented seat belt buckle is designed to operate in the front right part of the cabin, where it is responsible for securely locking the seat belt tongue. A properly functioning buckle is crucial for the effectiveness of the passenger protection system during sudden braking or a collision, as it transfers loads from the belt to the seat structure and the vehicle body.

This component works with factory Mercedes safety systems, such as tensioners or seat belt sensors, which allows for the correct operation of dashboard warning lights and the logic of driver assistance systems.

Construction and fitment for Mercedes W204 / W207

The buckle has been developed specifically for the seat and center console architecture in Mercedes W204 and W207 models, ensuring that the mounting geometry and operating angle are consistent with the manufacturer's factory specifications. The appropriate profiling of the housing and the length of the working section ensure convenient access to the buckle for the passenger, without interfering with the center console or armrest.

The original Mercedes origin means that the correct dimensional tolerances are maintained, which translates into a precise fit with the seat belt and the absence of play or unwanted noises while driving.

Condition, safety, and service application

The item is offered in used condition, which in practice means it has been removed from a vehicle but retains full functionality in terms of locking and releasing the belt. This solution allows for an economical repair of the safety system while maintaining the original manufacturer's specifications, without the need to use aftermarket replacements with uncertain parameters.

The front right seat belt buckle will prove particularly useful in situations where the existing component has suffered mechanical damage, operational wear (e.g., latch issues), or requires replacement after a collision. Using an original part from the same model group minimizes the risk of installation errors and electronics compatibility issues.

Benefits of using an original seat belt buckle

Choosing this seat belt buckle for your Mercedes W204 / W207 primarily offers:

• Maintaining the factory level of safety thanks to a design consistent with the manufacturer's requirements.
• Proper fitment to the seat and seat belt on the front right side.
• Reduction of repair costs through the use of a verified used part.
• No need for modifications to mounts or installation – direct replacement for the original component.

Expanding safety system upgrades

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

If you are considering a wider range of vehicle modifications and want to consciously combine safety elements with other changes in your car, it is worth reading the advice on selecting used components – you will find them in the article The best used parts for tuning your car, which discusses the practical aspects of selecting and verifying such components.