Mercedes-Benz M-Class ML W164 Rear Left N/S Tailgate Trunk Hinge A1647400137

The Left Rear Tailgate Hinge for Mercedes-Benz M‑Class W164 is an original body part from the Doors and Door Panels group, designed for installation on the left side of the tailgate. It enables stable guidance and secure opening and closing of the trunk lid, maintaining the vehicle's original body geometry. A used OEM part is a solution for those who want to restore proper tailgate operation without altering the vehicle's structure.

Specifications and technical data

• SKU: A1647400137
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647400137
• Substitutable numbers: A1647400137, A 164 740 01 37, ASZ
• Location on the vehicle: Rear, Left
• Category: Doors & Door Skins

Purpose and Function in the Body

The presented hinge is dedicated to the rear, left side of the tailgate in the Mercedes-Benz M‑Class W164 model. It is responsible for precise guidance of the tailgate along its opening axis, transferring loads during lifting and closing, and maintaining proper alignment with the body elements. By preserving the original design, it ensures compatibility with factory mounting points and correct cooperation with the tailgate actuators and lock.

Construction and Fit for Mercedes-Benz

The tailgate hinge has been designed by the manufacturer with the specific body geometry of the M‑Class W164 in mind. This means:

• maintaining appropriate connection rigidity between the tailgate and the body,
• correct guidance of the tailgate edges relative to the fenders and bumper,
• the possibility of adjusting the tailgate's position within the range specified by the manufacturer.

Thanks to this, after proper installation, uniform gaps can be achieved, stresses in the panel can be reduced, and the risk of the tailgate rubbing against adjacent elements can be minimized.

Condition and Benefits of Using a Used Part

The part is used, which in practice means it comes from disassembly and retains a structure consistent with the manufacturer's original specifications. Compared to low-quality aftermarket alternatives, the original hinge ensures:

• consistency with the factory mounting system,
• appropriate resistance to operational loads,
• maintenance of the correct pivot axis for the tailgate.

This solution is particularly beneficial for post-accident repairs or replacement of worn-out parts when restoring the tailgate's original operating parameters is a priority.

Professional Installation and Application

The hinge is intended for installation on the rear, left side of the vehicle. Installation in a workshop environment is recommended, following the manufacturer's procedures, including checking the tailgate's alignment with the body. A correctly installed part:

• ensures smooth opening and closing of the tailgate,
• reduces excessive load on the actuators and lock,
• allows for maintaining the seal of the luggage compartment.

By using an original component, problems with incomplete closing, rubbing, or excessive play in the tailgate area can be avoided.

Expanding Body Repairs on Mercedes

If you are planning a comprehensive repair or modernization of the door and tailgate area on your Mercedes and need other parts from the same group, such as panels, reinforcements, or additional structural elements, check the available parts in the Mercedes Doors and Door Panels category.

For owners of premium vehicles who want to better understand the specifics of operation and potential repair costs, a guide on problematic engine units may be helpful – you can find more information in the article Troublesome BMW E90 Engines: Find Out What Can Ruin Your Budget.