Mercedes W177 Wiper Arm Rear Window Tailgate Trunk Boot Lid A2478207701

Mercedes W177 Rear Wiper Arm for Tailgate is an original part from the wiper arms category, designed for installation on the rear window. It ensures stable blade guidance, uniform water collection, and safe visibility during driving in challenging weather conditions.

Specifications and technical data

• SKU: A2478207701
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478207701
• Substitutable numbers: A2478207701, A 247 820 77 01
• Location on the vehicle: Rear
• Category: Wiper Arms

Purpose and Function

The rear wiper arm on the Mercedes W177 model is responsible for precisely pressing the wiper blade against the glass surface on the tailgate. A correctly selected component:

• ensures uniform wiper operation across the entire working area,
• minimizes vibrations and noise during movement,
• protects the drive mechanism from excessive loads.

Thanks to proper adaptation to the specific body construction, the arm works with the rear window's geometry, which translates to stable removal of water and dirt.

Construction and Vehicle Fitment

The wiper arm has been specifically designed for the rear of the vehicle, taking into account the shape of the tailgate and the wiper pivot position. The placement indicated as "rear" means the component works with the rear wiper mechanism, and its geometry is adapted to:

• the wiper's working angle on the glass,
• the range of motion requiring effective cleaning,
• the mounting specific to the particular Mercedes model.

This precise fit allows for hassle-free installation in place of the original arm, without the need for modifications or adaptations.

Performance Characteristics and Advantages

The original rear wiper arm for the Mercedes W177 ensures operating parameters that comply with the manufacturer's factory specifications. In practice, this means:

• correct pressure of the wiper blade against the glass, which reduces streaks and improves visibility,
• appropriate structural rigidity, reducing the risk of deformation during prolonged use,
• compatibility with the original mounting and drive mechanism.

For the user, this translates to stable wiper system operation and maintaining driving comfort in rain, snow, or when driving on dirty roads.

Condition and Service Application

This wiper arm is a used part, making it an attractive service solution in case of damage to the original component, e.g., due to corrosion, breakage from ice on the window, or joint wear. Replacing the arm is a typical maintenance operation that allows for:

• restoring proper operation of the rear wiper,
• reducing noise and skipping of the wiper blade on the glass,
• protecting the drive mechanism from overload caused by improper arm function.

This is a practical solution for users who want to maintain the efficiency of the wiper system while keeping repair costs reasonable.

Mercedes Wiper Arms – Selection and Offer

If you are looking for other wiper arms for your Mercedes, check out the dedicated category where you will find a wide selection of parts tailored to different models: Mercedes wiper arms. This will help you easily select a component that matches your specific body type and equipment version.

Practical Usage Tips

When installing the rear wiper arm, it is worth paying attention to:

• correct setting of the rest position on the glass,
• tightening torque of the mounting in accordance with service recommendations,
• the condition of the wiper blade – replacing it simultaneously with the arm will improve its effectiveness.

Regular inspection of the wiper system, including the arms, helps maintain driving safety and comfort in variable weather conditions and reduces the risk of glass damage from worn components.