Mercedes W213 Window Lifter Motor Door Rear Left N/S Drive Unit A2139060502

The Mercedes W213 Rear Left Window Motor is an original part from the Window Regulators and Motors category, designed for the rear left window in the W213 body style. This solution is for users who expect stable operation of the window lifting mechanism and wish to maintain the factory comfort system characteristics in Mercedes cars.

Specifications and technical data

• SKU: A2139060502
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2139060502
• Substitutable numbers: A2139060502, A 213 906 05 02, KD
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Vehicle Application and Placement

The window motor is designed for installation in the rear – left side area, ensuring proper fit with the guides, cables, and door electrical system in the W213 model. Its placement in the vehicle is clearly defined, allowing the part to work seamlessly with the factory window controls and central comfort module without requiring modifications.

Precise fitting for a specific body position minimizes the risk of incorrect installation, squeaking, or uneven window operation. This is particularly important in premium vehicles where quiet, smooth, and consistent operation of window mechanisms is expected.

Technical and Functional Characteristics

The motor belongs to the group of components responsible for the electric window drive, working in conjunction with the lifting and lowering mechanism. As part of the Window Regulators and Motors category, it is responsible for:

• transmitting torque to the window lifting mechanism,
• stable operation throughout the full range of window movement,
• compatibility with factory door control buttons and the driver's panel,
• maintaining comfort functions, if provided for in the specific vehicle configuration.

Its original Mercedes origin ensures compatibility with the electrical system, current parameters, and control logic used in the W213. Consequently, the motor does not require the software adaptation typical of many aftermarket replacements.

Benefits of Using an Original Window Motor

Choosing this part is the ideal solution for drivers who want to restore proper functionality to the rear left window without altering the door's structure. Key advantages include:

• Factory Fitment – compatibility with mounting points, wiring harness, and window lifting mechanism in the W213.
• Comfort System Integration – correct operation with the vehicle's window control system and electrical safety features.
• Reduced Risk of Installation Issues – no need for custom adapters or electrical modifications.
• Maintained Mercedes Performance Characteristics – smooth, predictable window operation for everyday use.

This part, offered in Used condition, allows for an economical repair while maintaining the original manufacturer's specifications, which is particularly important when servicing higher-class vehicles.

Mercedes Window Regulators and Motors – Selecting the Right Parts

If you are looking for other Mercedes Window Regulators and Motors compatible with specific body styles and equipment, please visit our dedicated subpage: Mercedes Window Regulators and Motors. There you will find a wide selection of OEM components, making it easier to choose the correct motor or regulator for the other doors on your car.

Part Condition and Practical Application

The window motor is offered as a used part, providing a cost-effective way to restore the functionality of the window lifting system while preserving original quality. This is a good solution in situations where:

• the existing window drive no longer responds to commands,
• there are problems with the window stopping midway,
• irregular noises from the drive are occurring.

Replacing the rear left window motor in the W213 with an original part restores full window functionality without affecting other system components.

Technical Support and Knowledge of Drive Unit Reliability

When planning repairs for premium vehicles, it is beneficial to be aware of the typical weak points of specific models. For comparison, an analysis of problematic drive units has been prepared for the BMW segment, which you can explore in the article: Problematic BMW E90 Engines – A Practical Guide to Faulty Units. This type of knowledge helps in better planning the servicing of the entire vehicle, including electrical and comfort systems such as window mechanisms.