Mercedes C238 Window Lifter Regulator Mechanism Motor Rear Left N/S A2386700300

Mercedes C238 Window Lifter Regulator Mechanism Motor Rear Left N/S is an original component from the Window regulators and motors group, designed for the rear left window in the coupe body style. This used window regulator ensures a factory-fit for the door assembly, maintaining the correct window guidance geometry and proper compatibility with the factory comfort control system. It is a practical solution for users looking to restore full functionality of the electric window lift without the high cost of replacing the entire module with a new one.

Specifications and technical data

• SKU: A2386700300
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2386700300
• Substitutable numbers: A2386700300, A 238 670 03 00
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and vehicle placement

The presented window regulator is designed for installation in the rear left section of the vehicle body, in the rear passenger door on the driver's side. The construction is prepared to work with the factory motor controlling the window movement and the vehicle's standard electrical system, which facilitates installation and reduces the need for additional modifications.

Thanks to its dedicated placement in the vehicle, the correct kinematics of the window operation are maintained, which translates into smooth movement in the guides, stable closing, and proper sealing of the window against the door frame.

Benefits of using an original window regulator

Using an original window regulator in a C-Class coupe model allows for maintaining the structural integrity of the entire door system. In practice, this means:

• factory fitment to the door mounts and standard mounting points,
• proper cooperation with the factory window controls, including the comfort opening and closing function,
• maintaining the correct speed and smoothness of the window movement throughout the full range of operation.

The used OEM component is a reasonable compromise between repair costs and maintaining the high quality of workmanship characteristic of the Mercedes brand. Replacing a damaged mechanism with an original window regulator helps eliminate typical failure symptoms, such as window jamming, uneven lifting, or lack of response to control buttons.

Application in service practice

The rear left window regulator will prove effective both in routine repairs after a mechanical failure and when removing the consequences of a collision within the door area. Thanks to the preservation of the factory geometry of the mechanism, it is possible to precisely adjust the window relative to the seals and frame, which is important for acoustic tightness and protection against water.

In workshops specializing in the Mercedes brand, using an original window regulator facilitates the diagnostic and installation process because the operating parameters of the mechanism are consistent with the vehicle manufacturer's specifications. This, in turn, reduces the risk of repeat service visits related to improper window operation after repair.

Mercedes window regulators and motors – part selection

If you are planning a comprehensive repair or upgrade of the door zone in your Mercedes and need other elements from the same group, such as window lifting mechanisms, control motors, or complete regulator modules, check the available parts in the Mercedes window regulators and motors category.

Technical support and knowledge on part selection

When working with used OEM components, especially in premium class cars, it is crucial to properly match the components to the specific engine and equipment version. It is worth using practical guides on typical faults and ways to diagnose them. A good point of reference may be an article describing problematic power units in a popular model of the Bavarian brand – you can find it here: Faulty BMW E90 engines: check what can ruin your budget!. Although it concerns a different brand, it shows how important a conscious approach to service and part selection is in premium class cars.

Summary

Mercedes C238 Window Lifter Regulator Mechanism Motor Rear Left N/S is a practical solution for coupe owners who want to restore the efficient operation of the rear window on the driver's side, while maintaining factory fitment and mechanism operating parameters. The original element from the Window regulators and motors group supports proper cooperation with the vehicle's electrical system and enables service at a level consistent with the manufacturer's requirements.