Mercedes W211 Window Regulator Motor Rear Left N/S A2117300146

Mercedes W211 Window Regulator Motor Rear Left N/S is an original component from the Window regulators and motors group, designed for precise operation of the window lifting mechanism in the rear left door. Thanks to its factory-fit design for the Mercedes W211, it ensures stable window operation and proper integration with other door components.

Specifications and technical data

• SKU: A2117300146
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2117300146
• Substitutable numbers: A2117300146, A 211 730 01 46
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The window regulator in the rear left door is responsible for the smooth guidance and positioning of the window, whether controlled from the driver's panel or the passenger door switch. This component operates in demanding conditions – inside the door, exposed to moisture and temperature fluctuations – which is why it is crucial to use a part designed according to Mercedes factory standards.

Its placement in the rear left zone allows for direct replacement without interfering with other doors, and maintaining the original mounting geometry facilitates installation and reduces the risk of improper window alignment.

Construction and fitment for the Mercedes W211

The regulator has been designed specifically for the door architecture of the Mercedes E-Class W211 generation, which translates into:

• compatibility with factory mounting points inside the door panel,
• proper window guidance within the tracks,
• correct cooperation with the factory window motor (if included in the specific configuration),
• maintenance of structural rigidity during repeated lifting and lowering cycles.

As a result, the original operating characteristics of the window are preserved – without excessive play, jamming, or unwanted noises during movement.

Practical application and benefits of installation

Replacing the window regulator in the rear left door is recommended when symptoms such as uneven lifting, window dropping, mechanism skipping, or a complete lack of response to controls occur despite a functional electrical system. Using an original solution dedicated to the Mercedes W211 allows you to:

• restore full functionality of the window control in the rear left zone,
• maintain proper door sealing thanks to correct window closure,
• reduce additional strain on the window motor,
• maintain acoustic comfort inside the vehicle.

This solution is particularly beneficial for repairs of daily-driven vehicles, where reliability and consistent mechanism performance are essential.

Characteristics of the used component

The offered regulator comes from dismantling, which means it is an original Mercedes part with parameters consistent with the factory specification of the W211 model. Such components are a popular choice for repairs because they ensure proper structural and material fit, while also allowing for service cost optimization compared to new aftermarket replacements.

Mercedes window regulators and motors – expansion and service

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

Technical support for selecting used components

When choosing parts from dismantling – especially for more complex systems such as drives or modules – it is worth relying on reliable technical information and selection procedures based on manufacturer markings. You may find the expert guide discussing facts and myths about used drive components, verification procedures, and cost-effectiveness calculations helpful, available in the article Why it is worth buying used gearboxes and engines – facts instead of myths.