Mercedes X164 Door Window Lifter Regulator Cover Seal Rear Left N/S A1647300126

Mercedes X164 Door Window Lifter Regulator Cover Seal Rear Left N/S is an original component from the Window regulators and motors group, designed for the rear left section of the vehicle body. It ensures a tight and stable fit for the window regulator mechanism within the door, which translates into proper window operation and protection of the door interior against moisture and contaminants. This solution is dedicated to users who want to maintain the factory design of the window system in their Mercedes X164.

Specifications and technical data

• SKU: A1647300126
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647300126
• Substitutable numbers: A1647300126, A 164 730 01 26
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the window system

The window regulator cover with seal is responsible for properly closing the workspace of the mechanism in the rear left door. This component stabilizes the position of the regulator while creating a barrier against water and dirt that could penetrate the interior of the door and cause accelerated corrosion or interference with the mechanism's operation. Thanks to its fit for the specific X164 body model, installation is straightforward, without the need for modifications or shape adjustments. The factory mounting geometry is preserved, which facilitates service and subsequent window adjustments.

Compatibility with the body and door system

The component has been designed for use in the rear left part of the vehicle, in the passenger door area. This orientation allows for:

• proper fitment with the door structure on the rear driver's side,
• maintaining the correct position of the window regulator relative to the guides,
• maintaining a seal between the interior of the door and the exterior space. Precise fitment to the specific vehicle location limits the risk of stress on the window lifting mechanism and promotes uniform operation of the entire system.

Characteristics of the original Mercedes component

The cover with seal comes from the Mercedes range, which means maintaining factory dimensional and construction standards. The original solution ensures:

• compliance with the factory door and window regulator design,
• easier identification based on the OEM part number and interchangeable numbers,
• consistency with other window system components in the vehicle. As an element from the Window regulators and motors category, it works with the window lifting mechanism, creating a complete, functional service solution for the rear left body zone.

Condition, service application, and benefits of installation

The product is offered in used condition, which allows for economical repair of the window system while maintaining the manufacturer's original specifications. This type of component is particularly useful in situations where:

• the cover was damaged during the removal of the window regulator,
• the seal in the rear left door has ceased to perform its function,
• replacement of the component is necessary after a collision or bodywork intervention. A properly selected cover with a seal limits the ingress of moisture into the door interior, which promotes a longer service life for the window regulator, electrical connectors, and anti-corrosion elements. This is a practical solution for users who want to restore proper window operation without abandoning the factory design.

Part selection by numbers and expert support

When selecting body components and window accessories for a Mercedes, it is particularly helpful to use the OEM part number and interchangeable numbers. This allows for precise verification of the cover's compatibility with a specific body version and vehicle year, minimizing the risk of purchasing an incompatible component. If you are interested in a broader context regarding the selection of used components by catalog numbers, verification procedures, and the cost-effectiveness of purchasing second-hand parts, it is worth consulting the expert guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses, among other things, a practical approach to identifying parts by OEM numbers. If you are planning a comprehensive repair or upgrade of the door zone and window system in your Mercedes and need other elements from the same group, such as guides, regulator motors, or complete window mechanisms, check the available parts in the Mercedes Window regulators and motors category.