Mercedes-Benz A-Class W168 Front Left Door N/S Window Lifter Regulator Motor

Mercedes-Benz A-Class W168 Front Left Door N/S Window Lifter Regulator Motor is an original component from the Window Regulators and Motors group, designed for precise operation of the driver-side window. It ensures stable window guidance, proper integration with the vehicle's electrical system, and maintains the factory functionality of the door.

Specifications and technical data

• SKU: A1687201146-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1687201146
• Substitutable numbers: A1687201146, A 168 720 11 46, BG
• Location on the vehicle: Front, Left
• Offset (ET):
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented component is dedicated for installation in the front left door of Mercedes A-Class W168 generation vehicles. It is responsible for smooth raising and lowering of the window, maintaining it in the correct position, and working with the factory electric controls. Its location in the driver's door area makes this element crucial for the comfort of daily vehicle operation.

Thanks to the preservation of original guide geometry and mounting points, the window lifter with motor allows for seamless seating in the door structure, without the need for bodywork modifications or interference with the electrical harness. This solution is particularly beneficial for post-accident repairs and replacing worn-out mechanisms.

Construction and technical properties

The window lifter integrated with an electric motor constitutes a complete working assembly responsible for transferring drive to the window. The construction is based on factory solutions used by the manufacturer, which translates into proper fitment to the door shape, appropriate rigidity, and stable window guidance throughout the entire range of operation.

Key functional features of this element include:

• dedicated application for the front left door of the W168 body,
• integrated electric drive compatible with original cabin switches,
• factory mounting points for the door panel and window,
• maintenance of proper speed and operating culture of the mechanism.

As a part from the Window Regulators and Motors group, this element has been designed for multiple work cycles, typical for heavily used driver doors.

Benefits of using an original used component

Choosing an original, used window lifter with motor for the Mercedes A-Class W168 allows you to maintain the structural consistency of the vehicle and reduce repair costs compared to new replacements. A component sourced from the dismantling of a car of the same brand is characterized by compatibility with factory controllers and the electrical system, which minimizes the risk of fitment issues.

By using an original mechanism, you gain:

• certainty of proper fitment with the door structure,
• preservation of the window operating characteristics intended by the manufacturer,
• reduced installation time thanks to factory mounting points,
• a reasonable compromise between repair cost and component quality.

This is a particularly attractive solution for users who want to keep their car in a condition close to factory-new, without excessively increasing their service budget.

Installation zone and service aspects

The window lifter with motor is installed in the inner part of the front left door, under the upholstery. Access to the element requires removing the door panel and disconnecting electrical connectors, therefore installation in a workshop with experience in Mercedes W168 bodies is recommended. Correct adjustment of the window in the guides and proper tightening of the mounts has a direct impact on sealing and the absence of unwanted noises while driving.

Due to the electric nature of the drive, it is also important to maintain the correct order of connecting the installation and to check the mechanism's operation after installation. A properly selected and installed element restores full functionality of the driver-side window control.

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

To better assess the cost-effectiveness of using used components in your car, including drive and control elements, it is worth reading the expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses practical aspects of selecting parts by OEM numbers and real cost differences.

Additional arguments for choosing original, used components for premium class cars, such as Mercedes, are also provided by the article Crisis in the new parts market? Why in 2026 used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend, describing current market trends and the benefits of reaching for proven parts from dismantling.