Mercedes W246 Panoramic Roof Sunroof Sun Glass Roof Motor A2C53366919

Mercedes W246 Panoramic Roof Sunroof Sun Glass Roof Motor is a precision drive unit designed to operate the panoramic roof in B-Class W246 series models. It offers stable operation of the sliding and tilting mechanism, ensuring smooth opening and closing of the glass panel. This solution allows you to restore full sunroof functionality while maintaining the factory operating characteristics of the system.

Specifications and technical data

• SKU: 100C6326L
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 100C6326L
• Substitutable numbers: A2C53366919, A 2C5 336 69 19, 10007862B, AC253366919
• Category: Sunroofs & Parts

Purpose and function in the panoramic roof system

The panoramic roof motor in the Mercedes W246 is responsible for driving the guide mechanism and roof gears. Its task is to precisely control the position of the glass panel in response to signals from the comfort module and the cabin control panel. Thanks to properly selected gear ratios and operating characteristics, the drive ensures:

• smooth opening and closing of the roof while maintaining the correct movement speed,
• stable operation in tilt mode,
• compatibility with factory comfort functions (e.g., remote closing – if available in the specific vehicle).

A properly selected motor is crucial for avoiding overloads of the guide mechanism and incorrect closing, which can lead to leaks and increased noise in the cabin.

Compatibility and identification parameters

The offered item comes from the Panoramic roofs, sunroofs and parts group and is dedicated to Mercedes vehicles with a W246 body equipped with a panoramic roof. The motor has OEM markings and interchangeable numbers, which facilitates clear identification and selection of the correct variant for a specific vehicle configuration. In practice, this means that:

• it can be matched based on the factory part number,
• it is supported by the same electrical harness and connector as in the original installation,
• it maintains compatibility with the factory roof control.

Additionally, the product has an assigned SKU and defined interchangeable numbers, which facilitates compliance verification in catalogs and service systems.

Condition, origin and advantages of using a used component

The panoramic roof motor is offered as a used part, sourced from a dismantled Mercedes vehicle. Such electrical and electromechanical components work very well as a replacement because:

• they are factory elements, designed specifically for the given vehicle platform,
• they maintain original operating parameters and torque characteristics,
• they allow for reduced repair costs while maintaining high manufacturing quality.

Choosing an original, used sunroof drive is particularly beneficial in the case of faults such as the roof stopping halfway, lack of response to control buttons, or uneven operation of the mechanism. In many cases, replacing the motor itself restores full functionality without the need to interfere with the roof guides and cassettes.

To learn how to take care of dismantled parts in practice and extend their trouble-free operation, it is worth reading the guide How to extend the life of used car parts?, which describes, among other things, the principles of operating electronics and drive components.

Installation and service aspects

The panoramic roof motor for the Mercedes W246 is structurally prepared for installation in place of the factory drive, using original mounting points and the existing electrical installation. In practice, this means:

• no need for electrical harness modifications,
• use of standard screws and brackets,
• the possibility of performing a standard roof adaptation/initialization procedure after replacement (in accordance with the vehicle's service manual).

During installation, it is recommended to check the condition of the guide mechanism, seals, and correct setting of the end positions so that the new drive does not operate under excessive resistance. A properly selected and installed motor significantly reduces the risk of recurring panoramic roof operation problems.

Expanding the panoramic roof system in a Mercedes

If you are planning a comprehensive repair or modernization of the panoramic roof area in your Mercedes and need other elements from the same group, such as guides, cassettes, or control modules, check the available parts in the Panoramic roofs, sunroofs and parts Mercedes category.

More information about the benefits of choosing original dismantled components for this brand can be found in the article Used parts for Mercedes – original parts from dismantling, which discusses practical aspects of selecting and operating premium components.

Summary

Mercedes W246 Panoramic Roof Sunroof Sun Glass Roof Motor is a functional drive designed to restore the efficiency of the panoramic roof in the B-Class. It offers factory compatibility with the electrical installation and controls, and as an original element from the Panoramic roofs, sunroofs and parts group, it allows for a technically correct repair without compromises in terms of fit and mechanism operating culture.