Mercedes ML W163 Wiper Arm Rear Window Trunk A1638201944

Mercedes ML W163 Wiper Arm Rear Window Trunk is an original component from the Wiper arms group, designed for operation on the vehicle's rear window. It ensures stable wiper blade guidance, uniform pressure against the glass, and consistent performance under demanding operating conditions. Thanks to its factory geometry and correct mounting profile, it is a particularly beneficial solution when replacing a worn or damaged arm.

Specifications and technical data

• SKU: A1638201944
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1638201944
• Substitutable numbers: A1638201944, A 163 820 19 44
• Location on the vehicle: Rear
• Category: Wiper Arms

Purpose and technical function

The presented wiper arm is designed for installation on the rear part of the body, where it is responsible for the precise guidance of the blade across the trunk window. A correctly selected arm is crucial for:

• maintaining constant pressure of the blade against the glass surface,
• reducing vibration and noise during wiper operation,
• ensuring clear visibility in the rearview mirror during rain and when the window is dirty.

The proper geometry of the arm minimizes the risk of uneven blade wear and streaking, which translates into safer driving in difficult weather conditions.

Benefits of using an original arm

Using an original wiper arm in the ML W163 model allows for maintaining the factory performance parameters of the window cleaning system. The most important advantages include:

• precise fit to the wiper axis and the shape of the glass,
• stable operation of the mechanism throughout the full range of motion,
• reduced load on the wiper motor due to the correct weight and balance of the arm.

As a result, the wiper system operates predictably, and the drive components are not excessively loaded, which can positively affect their durability. This is particularly important in vehicles used intensively or in variable weather conditions.

Performance characteristics and installation

The rear wiper arm in this model is designed for installation in the factory location, without the need for vehicle structural modifications. This facilitates servicing and reduces the time required to replace a worn component. The product is in used condition, meaning it comes from disassembly and is intended for users looking for an economical yet original-compliant solution.

Before installation, it is recommended to perform a standard inspection of the mounting socket and check the operating range of the wiper mechanism to ensure smooth and collision-free operation of the arm on the rear window.

Application in the vehicle visibility system

A functional rear wiper arm has a direct impact on driving comfort and safety, especially when maneuvering and reversing in the rain or on dirty surfaces. A properly functioning rear wiper system:

• improves visibility through the rear window,
• facilitates observation of the situation behind the vehicle,
• reduces the need for frequent manual cleaning of the glass.

For users who care about the full functionality of the visibility system in their Mercedes, replacing a worn arm with an original component is a practical and technically sound solution.

Expanding the wiper system in a Mercedes

If you are planning a comprehensive repair or upgrade of the rear visibility zone in your Mercedes and need other components from the same group, such as additional arms, mounts, or compatible elements that work with the blade, check the available parts in the Mercedes Wiper arms category.

For drivers interested in a broader perspective on the selection of used components and their impact on vehicle handling, an article describing the comparison of turbochargers and practical aspects of installation may be helpful – you can find it here: Go-Kart Feeling XXL – used N18 turbocharger versus B48 in Mini Cooper S.