Mercedes SLK R172 Seat Belt Lower Tensioner Buckle Front Left N/S A1728600569

The Mercedes SLK R172 buckle, clasp, left front seatbelt tensioner is an original safety system component designed for installation on the front left passenger seat in Mercedes models. This part, from the Seatbelts and Parts category, ensures proper cooperation with the factory seatbelt mounting system and the vehicle's electronics.

Specifications and technical data

• SKU: A1728600569
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1728600569
• Substitutable numbers: A1728600569, A 172 860 05 69
• Location on the vehicle: Front, Left
• Category: Seat Belts & Parts

Purpose and Function in the Vehicle

The presented seatbelt buckle is an element mounted on the front left position in the cabin, responsible for securely fastening the driver's or passenger's seatbelt – depending on the market and vehicle configuration. The design, developed by the vehicle manufacturer, guarantees correct positioning of the buckle relative to the seat and proper cooperation with the tensioner.

This element is part of a complete passive safety system, responsible for:

• stable seatbelt mounting during driving and in emergency situations,
• correct operation of the tensioner when the system is activated,
• compatibility with the vehicle's system regarding seatbelt fastening indication.

Construction and Fit for Mercedes SLK R172

The Mercedes SLK R172 buckle, clasp, left front seatbelt tensioner has been designed as a dedicated element for a specific body platform. This means that the mounting geometry, the length specified by the manufacturer, and the angle relative to the seat are adapted to the interior construction of the SLK R172.

Key construction features include:

• factory mounting points matched to the original mounting holes in the floor or seat frame,
• integrated tensioner part designed to work with the vehicle's safety system,
• ergonomically shaped clasp, allowing for comfortable fastening and unfastening of the belt in daily use.

Benefits of Using an Original Belt Buckle

Using an original part from the Seatbelts and Parts category in a Mercedes allows you to maintain the safety parameters intended by the vehicle manufacturer. Compared to aftermarket alternatives, the factory buckle with a tensioner ensures:

• precise fit to the seat and body, without the need for modifications or adaptations,
• system compatibility – proper operation of the tensioner and seatbelt fastening indication,
• maintenance of factory safety standards for the protection of the driver or passenger in the front left position.

Thanks to this element, the full functionality of the seatbelt system can be restored after a collision, seat replacement, or interior repairs.

Condition and Application in Vehicle Service

The offered buckle with tensioner is a used part, sourced from dismantling, which allows for economical repair while maintaining the original manufacturer's specifications. This type of component is particularly useful in:

• post-accident repairs, when replacement of seatbelt system components is necessary,
• interior servicing, when the clasp or tensioner cable has been damaged,
• restoring complete equipment in vehicles after modifications or incomplete repairs.

It is always advisable to verify the correct part selection with the vehicle's data and the manufacturer's specifications to ensure full assembly compatibility.

Related Products and Technical Knowledge

If you are looking for other Mercedes Seatbelts and Parts for your car, check out our dedicated offer: Mercedes Seatbelts and Parts. There you will find a wide selection of safety system components tailored to various models of this brand.

Planning a more extensive repair or upgrade and want to better understand how to select original used parts? Check out our guide Best Used Car Parts – A Guide to the Most Popular Original Parts for Popular Car Brands and Models, where we discuss practical aspects of choosing used components, including safety system components.