Mercedes Vito W639 Windshield Windscreen Wiper Arm Right O/S A6398200144

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes Vito W639 Windshield Windscreen Wiper Arm Right O/S is an original windshield cleaning system component, designed specifically for this model. Thanks to its factory fitment, it ensures stable wiper blade operation, proper pressure against the glass, and predictable performance in all weather conditions. It is a practical solution for users who expect consistency with the vehicle's factory design and want to maintain the correct wiper operating geometry.

Specifications and technical data

• SKU: A6398200144
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6398200144
• Substitutable numbers: A6398200144, A 639 820 01 44
• Location on the vehicle: Right
• Category: Wiper Arms

Purpose and function in the wiper system

The right-side wiper arm is responsible for precisely guiding the blade across the windshield surface, in accordance with the operating range intended by the manufacturer. A correctly selected arm:

• maintains constant, even pressure of the blade against the glass,
• prevents vibrations and skipping during operation,
• reduces the formation of blind spots in the driver's and passenger's field of vision,
• supports effective removal of water, mud, and debris.

As a result, the wiper system in the Mercedes Vito W639 retains its factory effectiveness, which translates into better visibility and driving safety in the rain and during heavy windshield contamination.

Construction and fitment for Mercedes Vito W639

The offered wiper arm belongs to the Wiper arms category and is structurally prepared for installation on the right side of the vehicle. The arm's geometry, mounting method to the mechanism, and the blade attachment point are consistent with the factory solution used in the Mercedes Vito W639. Such fitment reduces the risk of:

• improper blade operating angle,
• collision with the other arm or the edge of the windshield,
• excessive load on the wiper drive mechanism.

The original Mercedes origin helps maintain consistency with other system components, which is important when servicing a fleet or commercial vehicle where predictability and repeatability of operation are key.

Performance characteristics and installation

The item is offered as a used part, which allows for an economical replacement while maintaining a design consistent with the factory specifications. The arm is ready for installation in place of a worn or damaged component, without the need to modify the wiper mechanism or the cowl panel mounts. In practice, this means:

• maintaining the original wiper operating trajectory,
• no need for adaptation or modifications,
• the ability to use standard wiper blades intended for this model.

For workshops and individual users, this is a solution that facilitates service and reduces vehicle downtime, while ensuring consistency with factory design assumptions.

Benefits of using an original wiper arm

Using a dedicated right-side arm in the Mercedes Vito W639 allows for maintaining the proper operating parameters of the entire wiper system. Key benefits include:

• maintaining the windshield cleaning area designed by the manufacturer,
• reduction of noise and vibration during wiper operation,
• less blade wear due to proper pressure,
• easier diagnostics and system service in the future.

For commercial vehicles such as the Vito, this is significant both in daily operation and in maintaining appropriate fleet safety standards.

If you are planning a comprehensive repair or upgrade of the windshield area in your Mercedes and need other elements from the same group, such as additional arms, mounts, or components working with the blades, check out the available parts in the Mercedes Wiper arms category.

For owners and users of other models of this brand who want to deepen their knowledge on the operation and servicing of equipment, an article describing practical rules for taking care of drive units and accessories in popular C-Class and E-Class models may be useful – you can find it here: Reliability under the star sign – how to take care of engine accessories in popular Mercedes-Benz C-Class and E-Class models?