Mercedes W212 Seat Lower Belt Tensioner Buckle Rear Left N/S A2128601969

The Mercedes W212 Rear Seat Belt Pretensioner is an original part from the seat belts and parts category, designed for installation on the rear left side of the vehicle. It ensures the proper functioning of the passenger restraint system, maintaining stable belt tension during daily use and in emergency situations.

Specifications and technical data

• SKU: A2128601969
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2128601969
• Substitutable numbers: A2128601969, A 212 860 19 69
• Location on the vehicle: Rear, Left
• Category: Seat Belts & Parts

Pretensioner Purpose and Function

The seat belt pretensioner is responsible for controlled tensioning of the belt webbing on the rear left seat. In conjunction with other passive safety system components, it helps to limit passenger body movement during sudden braking or collision, leading to more predictable restraint system behavior.

This element, dedicated to the Mercedes W212 series, guarantees correct fit to the body structure and compatibility with factory mounting points and the vehicle's wiring harness.

Advantages of Using an Original Pretensioner

Using a pretensioner dedicated to a specific vehicle model offers a range of functional and installation benefits:

• Factory Fit – designed for the geometry of the W212's rear left body section, eliminating the need for modifications.
• System Compatibility – works seamlessly with the original seat belt and other system components.
• Stable Mechanism Operation – maintains proper belt tension under typical driving conditions.
• Hassle-Free Service Installation – predictable replacement time due to compliance with factory technical documentation.

Installation Characteristics

The pretensioner is designed for installation on the rear left side of the vehicle, facilitating unambiguous identification of the mounting location during service work. The design is intended to work with the factory seat mounting and the original seat belt, preserving the original passenger protection system configuration.

When replacing, it is recommended to follow the service procedures specific to the W212 series, adhering to safety principles for working on restraint system components.

Condition and Vehicle Application

The offered pretensioner is from the group of used original Mercedes parts, allowing for economical repair while maintaining compliance with factory specifications. This solution is particularly beneficial for comprehensive servicing of the rear seat belt system, where maintaining component consistency is crucial.

The pretensioner is suitable for both standard replacement of a worn part and for post-accident repairs where restoring full passive safety system functionality is required.

Other Mercedes Seat Belts and Parts

If you are looking for other Mercedes seat belts and parts compatible with your model, check out our dedicated category: Mercedes Seat Belts and Parts. You will find a wide selection of passenger restraint system components there, making it easier to gather all the necessary parts in one place.

Practical Knowledge for Purchasing Used Safety Components

When selecting a used pretensioner, it is worth paying attention to compatibility with the specific body version and rear seat configuration. It is also good practice to familiarize yourself with the principles of safely choosing parts from the secondary market – the article: Buying Used Car Parts – Common Mistakes When Choosing Tuning Parts, which discusses key aspects of assessing the condition and selecting components, may be helpful.