Mercedes W166 Front Seat Headrest Wiring Cable Harness A1665404802

Description

Mercedes W166 Front Seat Headrest Wiring Cable Harness is a specialized electrical installation component designed for the front seat in Mercedes W166 class vehicles. This factory-made harness from the Wires, harnesses and connectors group enables the correct connection of the headrest to the seat installation, ensuring stable power supply and control signals. Thanks to its original design, it provides a reliable service solution for repairs or replacement of a damaged section of the installation.

Specifications and technical data

• SKU: A1665404802
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1665404802
• Substitutable numbers: A1665404802, A 166 540 48 02
• Location on the vehicle: Front
• Part type: Body Harness
• Category: Wiring Harnesses, Cables & Connectors

Purpose and function in the vehicle

The presented harness is designed to work in the front seat area, specifically in the headrest zone. It is responsible for routing signals and power between the headrest and the rest of the seat and vehicle installation. The design, tailored to the W166 platform, allows for proper cable routing, minimizing the risk of abrasion during seat adjustment and daily use.

This component is particularly important for:

• repairs of the driver or front passenger seat electrical installation,
• replacing a damaged headrest harness after a collision or mechanical interference,
• restoring full functionality of systems integrated with the headrest.

Advantages of using an original Mercedes harness

Using a dedicated harness in the W166 model allows for maintaining the factory logic of cable routing and the correct connectors characteristic of the Mercedes brand. As a result:

• installation is orderly, without the need to modify the wiring,
• compatibility with factory seat and headrest connectors is maintained,
• the risk of installation errors and subsequent electrical faults is reduced.

This solution is particularly recommended for professional service centers and workshops specializing in the Mercedes brand, where repair repeatability and compliance with the manufacturer’s technical documentation are essential.

Installation characteristics

The headrest wiring harness is intended for use in the front part of the cabin, within the seat area. Its length, connector placement, and routing method are adapted to the geometry of the W166 seat, which facilitates correct cable placement in factory guides and holders. With proper installation, it is possible to maintain:

• a stable electrical connection during seat adjustment,
• the appropriate cable bending radius,
• protection against accidental pinching or abrasion in the seat mechanisms.

Such a fit promotes long-term, reliable operation of the installation without the need for additional modifications.

Condition and service application

The offered harness comes from disassembly and is intended as a service component for Mercedes W166 vehicles where the original headrest installation has been damaged. It is a practical solution for post-accident repairs, seat replacement, or restoring full interior equipment functionality. Choosing such a component allows for cost reduction compared to purchasing a new part, while maintaining the proper fit for the specific model.

Expanding work within the seat installation

If you are planning a comprehensive repair or modernization of the front seat area in your Mercedes and need other elements from the same group, such as additional cable sections, connecting harnesses, or service connectors, check the available parts in the Mercedes Wires, harnesses and connectors category.

When planning broader service work, it is also worth checking out practical tips regarding the selection of used components and assessing their cost-effectiveness. You can find helpful information in the article Used gearbox – when is it worth it and what you need to remember, which discusses key aspects of purchasing components from the secondary market, also useful when making decisions about choosing other used parts.