Mercedes W639 W906 Seat Buckle Tensioner Belt Rear Centre A9018601169

The Mercedes W639 W906 Rear Middle Seatbelt Retractor is an original part from the Seatbelts and Parts category, designed for installation in the rear middle section of the vehicle. Developed by the vehicle manufacturer, it ensures proper integration with the factory safety system and maintains the intended passenger protection parameters.

Specifications and technical data

• SKU: A9018601169
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A9018601169
• Substitutable numbers: A9018601169, A 901 860 11 69
• Location on the vehicle: Rear
• Category: Seat Belts & Parts

Seatbelt Retractor Purpose and Function

The presented rear middle seatbelt retractor operates within the passive safety system, responsible for controlled belt tension during normal driving and appropriate reaction in emergency situations. Its placement in the rear of the vehicle allows for direct servicing of the middle seat, which is important when transporting passengers across the full width of the bench seat.

Thanks to its design, which aligns with factory specifications, the component works with original body mountings and seat geometry, contributing to maintaining the correct belt position relative to the user's body.

Compatibility and Fit for Mercedes W639 / W906

The retractor has been developed with Mercedes models from the W639 and W906 series in mind, meaning it is tailored to the specific interior architecture of these vehicles. This includes, among other things:

• Rear Bench Seat Geometry – proper belt routing for the middle seating position.
• Factory Mounting Points – compatibility with original body brackets and threads.
• Safety System Integration – conformity with the intended operation of the seatbelt system.

Such a precise fit minimizes the need for installation modifications and helps maintain the safety parameters specified by the vehicle manufacturer.

Characteristics of a Used Part

The offered seatbelt retractor comes from secondary circulation, meaning it is an original used part. Components of this type are often chosen for servicing vehicles used intensively, where maintaining the factory construction while optimizing repair costs is crucial.

As a mechanical and safety component, the retractor should be installed according to the vehicle manufacturer's service procedures, observing the correct tightening torque and installation orientation. If in doubt, it is advisable to entrust the installation to a specialized workshop to ensure the proper functioning of the seatbelt system.

Benefits of Using an Original Retractor

Choosing an original rear middle seatbelt retractor for the Mercedes W639 / W906 offers a number of practical benefits:

• Factory Fit – no installation issues, compatibility with seat and body construction.
• Safety System Consistency – maintains the intended belt performance characteristics in the rear of the vehicle.
• Stable Mounting – proper load transfer to the body structure during use.
• Optimized Service Costs – a used original part offers a sensible compromise between price and quality of execution.

This makes the retractor a good choice for replacing a damaged or worn-out component in commercial and passenger vehicles based on the W639 / W906 platform.

Selection by OEM Number and Purchase Support

When selecting a rear middle seatbelt retractor for a specific Mercedes model, it is crucial to verify compatibility using the OEM number and vehicle details. During the purchase process, it is advisable to use the VIN and service documentation to ensure that the chosen part matches the vehicle's factory configuration.

For users who wish to streamline the verification process, a detailed guide to selecting parts by VIN and OEM number, described in the article: Guide: How to Select the Right Car Part by VIN and OEM Number, will be helpful. The tips provided there make the task easier for both individual customers and workshops.

Other Seatbelts and Parts for Mercedes

If you also need other components from the Mercedes Seatbelts and Parts category – for example, for other seating positions or other models of this brand – check out the Mercedes Seatbelts and Parts available in our store. This will allow you to easily assemble a set of components needed for the complete servicing of your vehicle's safety system.