Mercedes W166 Headrest Guide Left Right N/O/S Rear Seat A1669700941 Black

Mercedes W166 Headrest Guide Left Right N/O/S Rear Seat is an original component from the Headrests group, designed for installation in the rear part of the vehicle body. The guide ensures stable movement of the headrest rods, which translates into safe and comfortable positioning of the passengers' headrests. This used OEM component is a sensible choice for interior maintenance when factory fitment and predictable performance during daily use are required.

Specifications and technical data

• SKU: A1669700941
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1669700941
• Substitutable numbers: A1669700941, A 166 970 09 41
• Location on the vehicle: Rear, Right, Left
• Category: Headrests

Purpose and vehicle placement

The guide is designed for installation in the rear part of the cabin and can be used on both the left and right sides. This solution facilitates the servicing of rear seats and allows for flexible use of the component depending on the interior configuration of a specific vehicle. Placement in the rear zone of the vehicle means the component has a direct impact on the ergonomics and comfort of rear-seat passengers.

Function and role in the headrest system

The main task of the guide is the precise guidance of the headrest rods within the seat backrest. It is responsible for:

• stable up-down movement during height adjustment,
• maintaining the alignment of the headrest relative to the backrest,
• reducing operational play that could cause unwanted vibrations,
• cooperation with the headrest locking mechanism.

Thanks to this, headrest adjustment remains smooth and repeatable, and the position set by the user is maintained while driving. The black color of the guide allows for seamless integration with most factory interior arrangements used in Mercedes W166 models.

Benefits of using an original guide

Using an original guide in the rear headrest system provides a number of practical service and utility benefits:

• Factory fitment to the seat – maintaining the correct mounting geometry and compatibility with the adjustment mechanism.
• Visual consistency with other interior elements – the black finish does not stand out against factory plastics and upholstery.
• Reduced risk of installation issues – no need for modifications or fitting aftermarket replacements.
• The ability to restore full headrest functionality after damage or wear of the previous component.

When servicing rear seats in a Mercedes W166, choosing such a guide allows you to maintain the original operating characteristics of the mechanism, which is particularly important for vehicles used on a daily basis.

Characteristics of the used component

The offered guide comes from disassembly, which means it is a previously used component that is still suitable for further use. This type of solution is often chosen for interior repairs when the priority is combining factory build quality with a rational service cost. The used OEM element allows you to avoid problems typical of cheap replacements while maintaining a favorable price-to-functionality ratio.

If you are interested in the broader context of using salvaged parts for repairing older models, it is worth checking out the practical tips in the article: Parts unavailable at the dealership? How to handle repairs of older models using salvaged parts.

Expanding headrest system service in the Mercedes W166

When working on the rear interior, it is worth considering comprehensive maintenance of the entire headrest system – from guides and locking mechanisms to the headrest cushions themselves. This allows you to limit the number of upholstery removals in the future and restore full functionality to the backrest zone for rear passengers. If you are planning a comprehensive repair or upgrade of the rear seat backrest zone in your Mercedes and need other elements from the same group, such as mounts, inserts, or complete headrests, check the available parts in the Mercedes Headrests category.