Mercedes-Benz A-Class W168 Rear Left Door N/S Window Regulator Lifter Manual

Mercedes-Benz A-Class W168 Rear Left Door N/S Window Regulator Lifter Manual is an original window mechanism component designed for installation on the driver's side in the rear part of the body. It ensures secure window guidance and stable operation of the mechanism during manual use, which translates into user convenience and proper cabin ventilation. Thanks to the factory fit for the W168 model door structure, installation is predictable and compliant with the manufacturer's specifications.

Specifications and technical data

• SKU: A1687300946
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1687300946
• Substitutable numbers: A1687300946, A 1687300946, A 168 730 09 46, ASZ
• Location on the vehicle: Rear, Left
• Gearbox type: Manual
• Category: Window Motors & Regulators

Purpose and body fitment

The presented window regulator is dedicated to the rear left body zone of the Mercedes A-Class W168 generation. The design was developed specifically for the door geometry of this model, which allows for maintaining the correct window guidance axis and proper pressure against the seals. Precise fitment to the specific mounting location minimizes the risk of stress, jamming, and leaks around the window.

The component works with a manual control mechanism, making it the right choice for vehicles equipped with manual window operation. Using a part consistent with the original body structure allows for maintaining factory door functionality and the correct operation of locks, seals, and upholstery.

Characteristics of the manual mechanism

The manual version of the window regulator uses a classic mechanical system where movement from the crank is transferred to the guides and arms responsible for positioning the window. This type of solution:

• ensures predictable, linear operation when raising and lowering the window,
• reduces the number of electrical components prone to failure,
• facilitates diagnostics and potential future repairs,
• allows for maintaining simple, functional door operation.

Thanks to the use of properly selected mounting points and guides, the mechanism keeps the window in a stable position both while driving and during frequent opening and closing of the door.

Condition, verification, and benefits of choosing a used part

The offered window regulator comes from dismantling and is a used component, which allows for combining reasonable cost with maintaining the original manufacturer's specification. Such components are frequently chosen for maintenance repairs when structural compliance with the vehicle's factory equipment is a priority. Original used window mechanism components often work better with existing door structures than universal-type replacements.

If you want to learn more about the arguments for choosing original parts from the secondary market, it is worth checking out an expert guide discussing facts and myths about powertrain components: Why it is worth buying used gearboxes and engines – facts instead of myths. Although it mainly concerns engines and transmissions, it well illustrates the general principles of safely selecting used parts by OEM numbers.

Application in the window system and user comfort

A functional window regulator in the rear left part of the body has a direct impact on passenger comfort and vehicle safety. A properly working mechanism:

• enables smooth opening and closing of the window within the range provided by the manufacturer,
• limits the risk of window misalignment and seal damage,
• supports maintaining proper acoustic and water tightness of the door,
• ensures a stable window position while driving on uneven surfaces.

Combined with properly selected guides and mounts, the manual mechanism is an important element of the entire window system, influencing the daily functionality of the vehicle and the perceived comfort of travel.

Mercedes window regulators and motors – expansion and modernization

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 lifting mechanisms, guides, or window drives, check the available parts in the Mercedes window regulators and motors category.

Additionally, to better understand the advantages of using original components in cars of this brand and the possibilities of optimizing service costs, you can use the advice contained in the article: Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?. This is a practical supplement to your knowledge when planning further service work on your car.