Mercedes W166 Rear Tailgate Boot Lid Left N/S Electric Strut A1669803664

Mercedes W166 Rear Tailgate Boot Lid Left N/S Electric Strut is an original component from the Loading tailgates group, designed for the precise operation of the tailgate in Mercedes W166 class vehicles. The electric drive ensures convenient, controlled opening and closing of the tailgate, which improves the ergonomics of daily trunk use and the comfort of the driver and passengers.

Specifications and technical data

• SKU: A1669803664-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1669803664
• Substitutable numbers: A1669803664, A 166 980 36 64
• Location on the vehicle: Rear, Left
• Part type: Tail Lift
• Category: Tail Lifts

Purpose and function of the strut

The presented strut is designed for installation in the rear of the vehicle on the left side, where it is responsible for assisting the movement of the tailgate. As an electric component, it works with the factory control system, allowing for smooth lifting and lowering of the tailgate without the need for significant force. Thanks to this, the operation of the trunk remains stable, predictable, and safe, even with frequent opening in urban conditions or during long journeys.

Benefits of using an original Mercedes component

Using an original strut in a Mercedes W166 allows for maintaining the structural consistency of the tailgate system. The component is matched to the body geometry and the operating parameters of the factory controller, which reduces the risk of overloads, improper closing, or uneven tailgate operation. In practice, this translates into:

• stable guidance of the tailgate throughout the full range of motion,
• reduced load on hinges and mounts,
• more comfortable use of the luggage space. For the user, this means maintaining the factory-standard operation of the tailgate and reducing the risk of additional bodywork repairs.

Installation characteristics and vehicle integration

The strut is intended for operation in a specific position – rear, left side of the vehicle – which facilitates correct identification of the installation point. The electric design is prepared for integration with the original Mercedes wiring, allowing for seamless operation with the comfort opening and closing functions once properly connected. Proper fitment of the component to the W166 model helps reduce installation time and minimizes the need for additional modifications.

Condition of the component and practical application

The offered strut is a dismantled part and is intended for users who want to restore the proper operation of an electrically controlled tailgate without investing in a new component. This solution is particularly beneficial in cases of:

• improper closing or the tailgate stopping halfway,
• a decrease in lifting force during opening,
• mechanical damage to the existing strut. Choosing a used, original component allows for maintaining high system functionality at a reasonable level of service costs.

Expansion of the Mercedes Loading tailgates system

If you are planning a comprehensive repair or modernization of the loading area in your Mercedes and need other components from the same group, such as additional struts, guides, or tailgate mounting elements, check the available parts in the Mercedes Loading tailgates category. For drivers who are simultaneously diagnosing disturbing noises from the chassis or want to optimize suspension repair costs, a practical service guide may be helpful – more information can be found in the article Knocking in the suspension? Discover a clever way to restore factory steering precision.