Mercedes W163 Rear Seat Backrest Spring Stay To Frame A1639800264

Mercedes W163 Rear Seat Backrest Spring Stay To Frame is a precision structural component of the seating system, designed specifically for the rear interior section of this model. It is responsible for providing stable support for the backrest, which translates into reliable maintenance of the seat shape and predictable seat behavior during daily use. Thanks to the use of an original Mercedes solution, the spring works with other rear seat components in a consistent and repeatable manner.

Specifications and technical data

• SKU: A1639800264
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1639800264
• Substitutable numbers: A1639800264, A 163 980 02 64
• Location on the vehicle: Rear
• Part type: Springs
• Category: Additional Seat Parts

Function and application in the rear seat system

The backrest support spring in the Mercedes W163 operates in the rear part of the vehicle, where it is responsible for maintaining the proper tension of the backrest structure. Its tasks include:

• stabilizing the backrest during driving and when folding the seats,
• maintaining the proper geometry of the rear seat,
• cooperating with the backrest adjustment and folding mechanisms.

A properly selected spring reduces unwanted play, improves the perceived stiffness of the backrest, and helps maintain predictable seat behavior during braking, acceleration, and while carrying luggage on the rear bench.

Benefits of using an original Mercedes component

Using a dedicated spring in the rear seat system ensures compatibility with the factory design of the Mercedes W163. The element has been designed for specific loads and operating ranges, which means it:

• fits factory mounting points without modifications,
• works with original guides and the backrest frame,
• maintains the spring characteristics intended by the manufacturer.

For workshops and users, this means predictable installation and the preservation of performance parameters similar to factory solutions, which is particularly important in vehicles used on a daily basis.

Installation characteristics and part selection

The rear seat backrest support spring is a component intended for operation in the rear cabin zone. When selecting the part, it is worth paying attention to:

• compatibility with the rear seat design in a given W163 unit,
• proper fit to the backrest frame and folding mechanism,
• consistency with other seating system elements from the same model series.

To facilitate identification, manufacturer markings are used, which allow the spring to be matched to the specific seat configuration in the vehicle. In case of doubt, it is worth comparing the geometry and mounting method with the element removed from the car.

Application zone and user comfort

The placement of the spring in the rear of the vehicle directly affects the comfort of rear passengers. A properly functioning element:

• helps maintain even back support across the entire height of the backrest,
• limits the sagging of the seat structure over a long period of use,
• supports backrest stability during frequent folding and unfolding of the rear bench.

Thanks to this, the interior of the Mercedes W163 retains its functionality and predictable performance characteristics, which is important both in daily city driving and on longer trips.

Other Mercedes seating system components

If you are planning a comprehensive repair or upgrade of the seating area in your Mercedes and need other elements from the same group, such as guides, mounts, or additional springs, check the available parts in the category Other Mercedes seat parts.

Support in choosing used components

When selecting used elements for the seating system, it is worth being guided by the compliance of manufacturer markings and the actual technical condition of the part. For users who want to deepen their knowledge about the impact of original components on the car's character and handling quality, the article on our blog may be helpful: Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?

If you want to organize the purchasing process and learn practical tips on verifying used elements before installation, check out the guide: Safe purchase of used car parts online – a step-by-step guide.