Mercedes W177 Wiper Arm Right O/S Driver Side Windscreen Wiper A1778201000

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes W177 Wiper Arm Right O/S Driver Side Windscreen Wiper is an original component from the Wiper arms category, designed for the driver's side. Engineered by the vehicle manufacturer, it ensures the correct geometry of the wiper blade operation, stable movement across the windshield, and predictable performance during intensive use.

Specifications and technical data

• SKU: rhd-A1778201000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1778201000
• Substitutable numbers: A1778201000, A 177 820 10 00
• Location on the vehicle: Right
• Category: Wiper Arms

Purpose and vehicle placement

The component is designed for installation on the right side of the vehicle, which corresponds to the driver's side in right-hand drive versions. The precise profiling of the arm guarantees proper pressure of the blade against the windshield, the correct operating angle, and no collision with the other wiper arm.

Precise fitment for the specific W177 body generation ensures seamless cooperation with the wiper mechanism, maintenance of the full range of motion, and uniform clearing of the driver's field of vision.

Technical and functional characteristics

The wiper arm is a factory-made construction, prepared for integration with the original drive mechanism and mounting on the wiper spindle. The applied arm geometry enables:

• stable blade guidance across the windshield at various driving speeds,
• maintenance of appropriate pressure on the glass surface,
• reduction of vibrations and noise during system operation,
• correct parking of the blade at the bottom of the windshield.

As a result, the wiper system maintains its factory performance parameters, which directly impacts safety and driving comfort in the rain.

Benefits of using an original wiper arm

Choosing an original wiper arm for the Mercedes W177 allows you to maintain the integrity of the entire windshield cleaning system. Compared to aftermarket replacements, the OEM component provides:

• exact fitment to the windshield shape and wiper spindle position,
• proper compatibility with the factory blade mount,
• appropriate structural rigidity, limiting deflection under heavy water loads,
• maintenance of factory system performance over a long service life.

This solution is particularly recommended for post-collision repairs, replacing worn-out wiper system components, or restoring the vehicle to its factory specification.

Component condition and service application

The offered wiper arm is a used part, which allows for cost-effective repairs while maintaining the vehicle manufacturer's original design. This type of component is suitable for both routine repairs and comprehensive rebuilding of the wiper system following mechanical damage.

Before installation, it is recommended to perform a standard inspection of the mounting socket, the wiper spindle, and the condition of the blade to fully utilize the capabilities of the offered arm and achieve uniform windshield cleaning.

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

For users interested in selecting used OEM components by catalog numbers and the principles of verifying compatibility for more advanced service projects, the article describing a practical approach to parts identification may be helpful – you can find it here: guide to selecting used OEM parts by numbers.