Mercedes ML W164 Rear Left Door N/S Electric Window Lifter Regulator

Mercedes ML W164 Rear Left Door N/S Electric Window Lifter Regulator is a precision component from the Window regulators and motors group, designed for the rear left body zone. It ensures stable seating of the window lifting mechanism, which translates into proper window operation and reduces unwanted play and noise in the door.

Specifications and technical data

• SKU: A1647303079
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1647303079
• Substitutable numbers: A1647303079, A 164 730 30 79, KZ
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and function in the window lifting system

The window lifter mount in the Mercedes ML W164 model is responsible for rigid and repeatable guidance of the mechanism in the rear left door. A correctly selected component minimizes the risk of the window tilting, uneven closing, and excessive load on the regulator and motor.

The placement in the rear – left area means that the part works with the complete window lifter assembly in a specific door, which is why maintaining structural compatibility with the factory Mercedes solution is crucial.

Benefits of using an original mount

Using a dedicated mount in a Mercedes ML W164 allows you to maintain the factory operating parameters of the side window. In practice, this means:

• stable window guidance without excessive play in the rails,
• reduction of vibrations and rattling coming from inside the door,
• lower load on other components from the Window regulators and motors group,
• maintaining the correct operating geometry of the entire lifting mechanism.

The component from this group is particularly important when symptoms appear such as slower window operation, jamming halfway through the range, or audible skipping of the mechanism during opening and closing.

Product characteristics and fitment

The offered mount comes from a Mercedes vehicle and is part of the original door architecture in the ML W164. Thanks to this, it maintains the correct geometry, mounting points, and compatibility with the factory regulator and window motor on the rear left side.

The product is in Used condition, which in practice means it has been dismantled, and its construction retains the functionality required for further use. This solution allows for an economical repair while maintaining the original assembly specifications.

Professional installation and operation

Due to the importance of the mount for the operation of the entire mechanism, installation by a person with experience in handling doors and window systems in Mercedes vehicles is recommended. Correct seating of the component:

• ensures proper tension of the lifter cables or arms,
• allows avoiding excessive motor load,
• reduces the risk of a repeat failure shortly after the repair.

When replacing the mount, it is worth paying attention to the condition of other components in the door – rails, seals, and the regulator itself – to restore the full efficiency of the entire system in one service operation.

If you are planning a comprehensive repair or upgrade of the side window zone in your Mercedes and need other elements from the same group, such as rails, brackets, or complete lifting mechanisms, check the available parts in the Mercedes Window regulators and motors category.

How to safely select a part by numbers and model

To ensure that the mount will work properly with the existing window regulator, it is worth verifying compatibility by catalog numbers and by the specific body variant. Data from the vehicle's rating plate and service documentation can be helpful.

When selecting components for a Mercedes, procedures based on OEM numbers and reference numbers are particularly useful. A detailed discussion of such methods can be found in the guide: Buying parts online without risk – 5 proven ways to verify component compatibility by OEM numbers and paint codes, which also describes practical examples for the Mercedes brand.

Additionally, if you are interested in the broader context of using used components in vehicles – including cost-effectiveness analysis and selection procedures by numbers – it is worth reading the article Why it is worth buying used gearboxes and engines – facts instead of myths, where the key principles of safely using the used parts market are discussed.