Mercedes W169 Rear Left Door N/S Electric Window Regulator Lifter

Mercedes W169 Rear Left Door N/S Electric Window Regulator Lifter is an original component from the Window regulators and motors group, designed for operating the rear left window in the A-Class W169 body style. This used window regulator ensures factory-fit installation, maintaining the correct window guidance geometry and proper compatibility with the factory electric controls. It is a practical solution for users looking to restore full functionality to the window lifting mechanism without modifying the door structure.

Specifications and technical data

• SKU: A1697303379
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1697303379
• Substitutable numbers: A1697303379, A 169 730 33 79, A1697301379, A 169 730 13 79
• Location on the vehicle: Rear, Left
• Category: Window Motors & Regulators

Purpose and fitment for Mercedes W169

The presented window regulator is dedicated to the rear left window in the W169 generation A-Class model, meaning its design is adapted to the factory mounting points and door guides. Placement on the vehicle: rear – left side allows for clear identification of which door panel the component should be installed in, minimizing the risk of errors when selecting parts.

By using an original Mercedes solution, compatibility with factory wiring, window controls, and vehicle electrical safety systems is maintained. This is particularly important for vehicles equipped with advanced comfort electronics, where an incorrectly selected component can cause system errors.

Construction and function of the window lifting mechanism

The window regulator is responsible for the stable vertical guidance of the glass pane and transferring drive from the electric motor to the window movement. The design utilizes a system of guides and cables adapted to the shape of the rear left door in the W169, ensuring smooth movement without excessive resistance. A properly functioning mechanism reduces motor strain and decreases the risk of jams, which could lead to damage to the electrical system or the window slipping out of its guides.

The component from this group operates in the immediate vicinity of the seals and door sheet metal, which is why its geometry is crucial for interior sealing and acoustics. Proper alignment of the regulator with the door structure helps maintain the correct pressure of the window against the seals, which translates into reduced cabin noise and protection against moisture.

Condition, service application, and benefits of installation

The offered window regulator comes from the used Mercedes parts segment, which allows for a significant reduction in repair costs compared to purchasing a new component, while maintaining the manufacturer's original specifications. This solution is particularly beneficial for maintenance repairs when only the window mechanism is damaged, while other door components remain functional.

Replacing the window regulator is recommended in situations where symptoms appear such as: uneven window lifting, jamming halfway through the movement range, the window dropping after releasing the button, or distinct cracking sounds from inside the door. Installing a functional component restores proper system operation, increases vehicle comfort, and limits the risk of further damage, such as glass breakage or electrical system overload.

Window regulators and motors – expansion and door zone service

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

Technical support and service knowledge

When selecting components for the window system, it is worth considering not only the installation side but also compatibility with the equipment of the specific vehicle version. For more advanced repairs of drive and engine systems, expert materials can be helpful – for example, for users considering the purchase or service of premium segment cars, the article Emergency BMW E90 engines: check what can ruin your budget! will be useful, as it shows how important an informed approach to choosing components is.

If you are wondering about the choice between new parts, replacements, or secondary market elements, it is worth reading the guide Original, replacement, or used – which car parts are the most cost-effective?, which discusses cost and operational differences and suggests when a used window regulator is a reasonable and safe solution.