Mercedes W221 Door Window Regulator Lifter Mechanism Rear Right O/S A2217300246

Mercedes W221 Door Window Regulator Lifter Mechanism Rear Right O/S is a factory window lifting mechanism designed for the rear right side of the vehicle body. As an item from the Window Regulators & Motors group, it ensures precise window guidance and stable operation of the window opening and closing system, which translates into vehicle usage comfort.

Specifications and technical data

• SKU: A2217300246
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2217300246
• Substitutable numbers: A2217300246, A 221 730 02 46
• Location on the vehicle: Rear, Right
• Part type: Window Regulator
• Category: Window Motors & Regulators

Application and fitment for Mercedes W221

The presented mechanism has been designed specifically for the rear right part of the body in the Mercedes S-Class W221 generation model. It is responsible for transferring the drive from the window lift motor to the rails, enabling smooth opening and closing of the window in the rear passenger door. Thanks to a design consistent with factory solutions, proper window guidance, reduction of play, and correct cooperation with the vehicle's electrical system are maintained.

Construction and function of the window regulator mechanism

The window regulator mechanism in the Mercedes W221 is based on a system of rails, cables, and rollers working with the motor controlling the window movement. The appropriate geometry of the load-bearing elements ensures even load distribution and stable vertical guidance of the glass pane. A properly selected regulator reduces the risk of the window jamming, excessive vibrations, or misalignment, which is important for both acoustic comfort and the durability of door seals.

Thanks to the use of the original design intended for the rear right side of the body, installation proceeds in an orderly manner – the mounting points coincide with the factory holes in the door, and the mechanism works with the factory window control. This solution allows for restoring full window functionality after a failure or wear of the previous component.

Benefits of using the original mechanism

Using a dedicated window regulator in the Mercedes W221 brings a number of practical advantages:

• maintaining proper window operation in the rear right part of the body,
• compatibility with the factory control system and safety features,
• stable window guidance, reducing the risk of glass and seal damage,
• the ability to restore full door functionality after a mechanism failure.

The item from the Window Regulators & Motors category is particularly important in high-end vehicles such as the Mercedes W221, where acoustic comfort, tightness, and smoothness of window operation are an important element of the overall driving experience.

Product characteristics and condition

The offered window regulator mechanism is a Mercedes brand part, which means compliance with the factory vehicle specification and fitment to the rear right door structure. The product is in used condition, which allows for an economical repair of the window system while maintaining the original design. Before installation, it is recommended to perform a standard verification of the mechanism's operation and check the mounting points in the door to ensure trouble-free operation after replacement.

Part selection by numbers and technical aspects

When selecting a window regulator mechanism for a specific Mercedes W221, it is crucial to compare part markings and vehicle placement. Proper fitment to the rear right side of the body minimizes the risk of installation problems and guarantees correct cooperation with the electrical system and comfort control units. In case of doubt, it is worth using catalog numbers and vehicle documentation data to ensure that the selected element corresponds to the configuration of the specific car.

For users interested in a broader context of purchasing used components, including the principles of selection by catalog numbers and VIN, the following expert guide may be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses practical procedures for part identification and repair cost optimization.

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 rails, lift motors, or complete window mechanisms, check the available parts in the Window Regulators & Motors Mercedes category.