Mercedes CLA C117 WIndow Lifter Rear Right O/S Window Regulator A1177300279

Mercedes CLA C117 WIndow Lifter Rear Right O/S Window Regulator is an original component from the Window regulators and motors group, designed for the rear right window in the CLA C117 body style. This used window regulator ensures a factory-fit, maintaining the correct window guidance geometry and stable operation with the factory electric controls in your Mercedes.

Specifications and technical data

• SKU: A1177300279
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1177300279
• Substitutable numbers: A1177300279, A 117 730 02 79
• Location on the vehicle: Rear, Right
• Category: Window Motors & Regulators

Purpose and function in the vehicle

The presented window regulator is dedicated for installation in the rear right part of the CLA C117 model body. It is responsible for the precise raising and lowering of the window, maintaining it in the set position, and smooth operation with the factory door switches and the central comfort control system. Thanks to a design consistent with the manufacturer's specifications, the correct operating speed, direction of movement, and safety of use are maintained.

Construction and technical fitment

The window regulator belongs to the group of components responsible for the mechanical guidance of the window and the transmission of drive from the electric motor. The construction has been designed for the specific dimensions of the CLA C117 door, which translates into:

• correct positioning of mounting points in the door,
• stable window guidance throughout the entire range of motion,
• compatibility with the factory motor and electrical wiring,
• maintenance of seal integrity and proper window pressure against the seals.

As a result, the installation is predictable, and the risk of improper fitment of the component with the door panel is minimized.

Benefits of using an original window regulator

Using an original window regulator in a Mercedes CLA C117 allows you to maintain the consistency of the window lifting system with the rest of the vehicle's electrical installation. In practice, this means:

• stable window operation without jamming or excessive play in the guides,
• preservation of comfort closing and opening functions, if present in the vehicle,
• reduced load on the window motor due to the correct geometry of the mechanism,
• reduction of operating noise of the mechanism inside the door.

A used component from this group is an attractive cost-effective solution, allowing you to restore full functionality of the rear window after a mechanical failure or operational wear.

Professional selection and installation

To ensure the proper operation of the system, it is worth verifying the compatibility of the window regulator with the specific vehicle equipment version and the side of installation. It is recommended that installation be performed by a workshop experienced in working with Mercedes doors and upholstery, which minimizes the risk of damaging clips, seals, and electrical wiring. A correctly installed window regulator works with the factory mounting points, so it does not require any interference with the door structure.

Mercedes window regulators and motors – expansion and service

If you are planning a comprehensive repair or upgrade 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.

More about the cost-effectiveness of used components

When choosing a used window system component, it is worth knowing the general principles of selecting parts by OEM numbers and the real cost differences between new and used components. A detailed discussion of this topic, along with verification procedures and practical examples, can be found in the guide Why it is worth buying used gearboxes and engines – facts instead of myths, which helps you approach the purchase of used car components consciously.