Seat Belt Buckle Mercedes C118 W177 Catch Rear Left N/S A1778609201

Mercedes C118 W177 Rear Left Seat Belt Buckle is an original safety system component, designed for installation on the rear left side of Mercedes vehicles from the C118 and W177 series. This used OEM part helps maintain factory safety standards and compatibility with the vehicle's system.

Specifications and technical data

• SKU: A1778609201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1778609201
• Substitutable numbers: A1778609201, A 177 860 92 01
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Seat Belt Buckle Purpose and Function

The presented rear left seat belt buckle belongs to the Seat Belts and Parts category and is a crucial element of the passenger protection system for the rear seat. It ensures a secure, mechanical connection of the seat belt webbing to the seat structure, enabling the system to function correctly in an emergency situation.

Vehicle placement: rear – left side, meaning this component is dedicated to a specific mounting position and should only be used there to maintain proper belt routing geometry and compliance with factory mounting points.

Benefits of Using an Original Seat Belt Buckle

Using an original seat belt buckle in a Mercedes C118 / W177 offers several practical benefits:

• Factory Fit – compatible with the seat and body structure, requiring no modifications.
• Integration with Safety System – proper cooperation with the seat belt webbing and other system components.
• Stable Mounting – designed for specific mounting points in the rear left section of the vehicle.
• Reduced Risk of Incorrect Installation – dedicated vehicle placement facilitates correct installation.

This buckle ensures predictable safety system performance during daily use and in emergency situations.

Component Condition and Practical Application

The offered seat belt buckle is a used OEM part, which translates to a favorable combination of original manufacturing quality and an attractive price compared to a new part. This solution is particularly recommended for:

• post-accident repairs of the rear part of the vehicle,
• mechanical damage to the existing buckle,
• restoring full functionality of the seat belt system after service intervention.

Choosing an original, used component helps maintain consistency with the factory Mercedes specification, which is important for both safety and subsequent vehicle diagnostics.

Selection and Vehicle Model Compatibility

To correctly select the rear left seat belt buckle for your Mercedes, pay attention to:

• body series compatibility (C118 / W177),
• vehicle placement – rear, left side,
• type of seat belt system used in the specific equipment version.

If you have doubts about selection, it is helpful to compare the mounting structure and buckle shape with the part currently installed in your car. Maintaining compatibility with the original solution minimizes the risk of safety system malfunction.

Other Seat Belts and Parts for Mercedes

If you also need other components from the Mercedes seat belts and parts category, check out the Mercedes seat belts and parts available in our store to complete the set of components for your vehicle.

Technical Knowledge and the Aftermarket

Are you interested in a broader context of selecting aftermarket parts, comparing costs, and the durability of solutions used by different manufacturers? See the analysis of BMW powertrains in the article BMW N47 vs M57 / M57N / M57N2 – Ranking of Legendary Diesels, which discusses, among other things, the impact of used parts quality on operating costs and vehicle reliability.