Mercedes GL X164 Rear Quarter Window Actuator Motor A2518200342

Mercedes GL X164 Rear Quarter Window Actuator Motor is an original component from the Window regulators and motors group, designed to operate the rear quarter window in SUV bodies. The precise drive ensures smooth opening and closing of the window, which improves cabin ventilation comfort and daily usability. This used component allows for a technically correct repair of the system without the need to invest in a new part.

Specifications and technical data

• SKU: A2518200342
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2518200342
• Substitutable numbers: A2518200342, A 251 820 03 42
• Location on the vehicle: Rear
• Part type: Window Motor
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The Mercedes GL X164 Rear Quarter Window Actuator Motor is responsible for driving the opening and closing mechanism of the rear quarter window in the tailgate. The component operates in an axially guided system, transmitting torque to the tilting mechanism, which enables:

• controlled tilting of the window within the range specified by the manufacturer,
• stable closing without excessive play,
• maintaining system tightness when the mechanism is functioning correctly. Its location at the rear of the vehicle body means that the component works in conjunction with the tailgate electrical installation and the comfort control system.

Benefits of using an original motor

Using an original motor in the Mercedes GL X164 allows for maintaining the consistency of the entire window opening system's operating parameters. Key advantages include:

• Factory fitment to the mounts and geometry of the tailgate, without the need for modifications.
• Proper torque and rotational speed characteristics, consistent with the body manufacturer's specifications.
• Compatibility with factory comfort controls and electrical safety features. Thanks to this, the repair of the quarter window system is predictable, and the risk of mechanism operation issues after installation is minimized.

Installation and operational characteristics

The motor is structurally prepared for operation in the rear zone of the vehicle body, where it is exposed to temperature changes, humidity, and vibrations from the suspension. The housing and drive guidance method are adapted to these conditions, which promotes stable operation over a long period of use. During replacement, it is recommended to:

• verify the condition of the window tilting mechanism (guides, hinges, mounting points),
• check the electrical wiring within the tailgate area,
• verify the correct operation of the control system after installation (full opening and closing cycle).

Product condition and practical application

The item is offered in a used condition, which allows for an economical repair while maintaining the original design specifications. This type of solution is particularly beneficial for vehicles in intensive use, where both correct system operation and rational service costs are important. It is always worth confirming the selection of the motor for a specific vehicle version based on manufacturer markings or catalog data to avoid installation mismatches. If you are planning a comprehensive repair or upgrade of the window area and window mechanisms in your Mercedes and need other components from the same group, such as window regulator drives, controllers, or additional comfort modules, check the available parts in the Mercedes window regulators and motors category.

Selection by part numbers and approach to used components

When working with original, used window drive components, it is essential to ensure proper matching based on manufacturer markings and application parameters. It is recommended to use selection procedures based on catalog data to maintain compatibility with the electrical installation and body mechanics. If you want to better understand how to safely and consciously use the used parts market, including drive components and mechanical assemblies, our expert guide will be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths. You will find practical information there about condition verification, selection by markings, and repair cost optimization.