Mercedes W177 Gas Pressurized Spring Strut Tailgate Trunk Left N/S A1779800164

Mercedes W177 Gas Pressurized Spring Strut Tailgate Trunk Left N/S is an original component from the Tailgates and rear parts group, designed for precise operation in the rear section of the vehicle body. It supports and stabilizes the tailgate, ensuring convenient opening and controlled, safe closing. Using a pre-owned component of this type allows for an economical yet technically sound repair of the tailgate lifting system.

Specifications and technical data

• SKU: A1779800164
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1779800164
• Substitutable numbers: A1779800164, A 177 980 01 64
• Location on the vehicle: Left
• Category: Boot & Hatch Lids

Purpose and function of the gas spring

The presented actuator operates on the left side of the tailgate, responsible for supporting and stabilizing the tailgate wing in W177 series models. The properly selected characteristics of the gas spring ensure smooth lifting and controlled lowering of the tailgate, which reduces stress on the hinges and lock, while also improving the comfort of daily vehicle use.

This element is particularly important in situations where the tailgate:

• drops spontaneously or does not maintain an open position,
• opens unevenly compared to the right side,
• requires increased force to lift.

Replacing a worn actuator with a functional, original component allows for the restoration of the proper operation of the entire tailgate lifting system.

Benefits of using an original Mercedes component

The gas spring dedicated to the W177 series has been designed for the specific weight and geometry of the tailgate, ensuring the correct support force and repeatable operating characteristics. Using an original Mercedes solution means:

• factory fitment to the mounting points on the left side of the body,
• proper cooperation with the hinges and tailgate lock,
• preservation of the opening and closing dynamics intended by the manufacturer.

A pre-owned element from this group, provided it is in good technical condition, represents a reasonable choice for accident repairs and maintenance where compliance with the vehicle's design and control of service costs are important.

Installation in the rear zone of the vehicle

The tailgate actuator is mounted in the rear part of the body, between the body structure and the tailgate wing. Positioning on the left side requires attention to:

• correct seating in the mounting sockets,
• maintaining the proper orientation of the element during installation,
• checking the symmetry of operation relative to the right side after completing the replacement.

Selecting the correct actuator for a specific W177 model helps avoid overloading the hinges, uneven lifting of the tailgate, and excessive wear of the mounting elements.

Application in rear body repairs

The tailgate gas spring is often replaced during accident repairs of the rear part of the vehicle, tailgate geometry corrections, or due to typical wear and tear. In combination with other rear zone components, it enables the restoration of full trunk functionality and user comfort.

If you are planning a comprehensive repair or upgrade of the rear body zone in your Mercedes and need other elements from the same group, such as tailgate hinges, locks, or additional supports, check the available parts in the Mercedes Tailgates and rear parts category.

Additional technical support

When selecting pre-owned body elements and associated systems, it is worth being guided not only by price but also by the technical condition and compatibility with the specific vehicle version. For more complex repairs of the drivetrain or elements cooperating with the rear part of the body, practical guides can be helpful. To better understand the specifics of pre-owned components and reduce the risk of ill-advised purchases, it is worth reading the material: Second-hand differential – what you need to know about used differentials, sensors, and drivetrain systems.