Mercedes-Benz CLC CL203 Rear Left N/S Seat Belt Buckle Tensioner A2038601769

Mercedes-Benz CLC CL203 Rear Left N/S Seat Belt Buckle Tensioner is an original safety system component designed for installation on the rear left side of the vehicle body. As a Mercedes product, it ensures proper integration with factory seat belts and vehicle electronics, resulting in stable performance during emergency situations. This used tensioner is an economical yet technically precise solution for post-accident repairs or interior servicing.

Specifications and technical data

• SKU: A2038601769
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2038601769
• Substitutable numbers: A2038602769, A 203 860 27 69, A2038601769, A 203 860 17 69, A2038600369, A 203 860 03 69
• Location on the vehicle: Rear, Left
• Category: Other Exterior Parts & Accessories

Purpose and function of the seat belt tensioner

The seat belt tensioner on the rear left side is responsible for dynamically tightening the seat belt against the passenger's body when sudden deceleration is detected. A correctly selected component:

• stabilizes the passenger's position during a collision or sudden braking,
• works in conjunction with the airbag system and collision sensors,
• limits the risk of excessive body movement in the seat.

Thanks to its dedicated placement in the rear part of the cabin on the left side, the tensioner is structurally matched to the body geometry and seat belt routing in CL203 family models.

Compatibility and interchangeable numbers

The offered tensioner belongs to the group of OEM components for which interchangeable numbers are provided, facilitating part selection within the same construction platform. Using the appropriate reference numbers allows you to:

• verify compatibility with a specific body version and model year,
• replace a damaged component with another technically equivalent counterpart from the same line,
• minimize the risk of installation issues and safety system errors.

Before purchasing, it is recommended to compare the markings with the vehicle's service documentation or use a reference number search engine to ensure full compatibility with the installation in your Mercedes.

Installation characteristics – rear, left side

The seat belt tensioner designed for the rear left side is structurally prepared to operate at a specific body mounting point. Proper vehicle placement means that:

• the mounting geometry corresponds to the factory bolt-on points in the rear seat area,
• the length and routing of the belt are matched to the left seating position,
• electrical connectors are prepared to work with the wiring harness intended for this position.

Such a fit facilitates service installation and reduces the need for system modifications, which is particularly important for components related to passive safety.

Benefits of using an original Mercedes component

Using a seat belt tensioner from the Mercedes range allows you to maintain consistency with the vehicle's factory configuration. Key advantages include:

• maintaining operating parameters in accordance with the vehicle manufacturer's specifications,
• secure fit to the seat structure, mounts, and upholstery,
• proper cooperation with safety system control modules.

A used OEM component is a solution that, in many cases, allows for reduced repair costs while maintaining a high level of safety system functionality.

Support with selection and additional information

If you are planning a comprehensive repair or upgrade of the rear passenger safety zone in your Mercedes and need other items from the same group, such as seat belts, seat mounts, or collision sensors, check out the available parts in the Other Mercedes category.

When selecting safety components, it is worth knowing the differences between solutions used in standard and sports versions, which is why the comparative material regarding advanced drive and braking systems may be helpful – you can find it in the article Audi RS vs other models – what is hidden under the hood and chassis?.

If you are considering whether it is better to choose new components or proven parts from the secondary market when repairing a safety system, you will find a practical comparison of advantages and costs in the guide New or used? A comparison of costs and quality of car parts, which will help you choose the optimal solution in terms of technical requirements and budget.