Mercedes W177 X156 Tailgate Windscreen Rear Wiper Arm Cover Trim A2478240000

Mercedes W177 X156 Tailgate Windscreen Rear Wiper Arm Cover Trim is a precisely fitted component from the Wiper arms group, designed for the rear body area. It provides protection for the wiper mechanism against dirt and weather conditions, which promotes stable operation of the windshield cleaning system and an aesthetic appearance of the tailgate.

Specifications and technical data

• SKU: A2478240000
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2478240000
• Substitutable numbers: A2478240000, A 247 824 00 00
• Location on the vehicle: Rear
• Category: Wiper Arms

Purpose and function of the cover

The rear wiper arm cover in Mercedes W177 and X156 series models is responsible for securing the connection between the arm and the mechanism axis, as well as for the aesthetic finish of the rear window. The component is mounted in the rear area of the vehicle and works with the factory wiper system, limiting the access of moisture, dust, and road salt to critical mounting points.

Thanks to its proper profile, the cover helps maintain stable guidance of the wiper arm, which translates into even pressure of the blade against the glass and improved visibility in difficult weather conditions. This is particularly important in daily use, when the vehicle is frequently driven in rain, snow, or on dirty roads.

Benefits of using an original rear wiper cover

Using a dedicated cover in the rear body area brings a number of practical benefits:

• precise fit to the wiper arm and tailgate geometry,
• protection of the arm connection against dirt and moisture,
• maintenance of a consistent body styling line,
• reduction of the risk of accelerated corrosion of mounting elements,
• stable operation of the rear wiper in typical road conditions.

Choosing an original Mercedes component allows you to maintain factory fit and appearance, which is important for both user comfort and the long-term value of the vehicle.

Installation and operational characteristics

The cover is designed for installation in the rear part of the vehicle, at the point where the wiper arm connects to the drive mechanism. The design provided by the manufacturer allows for disassembly and reassembly during standard service work, such as replacing the arm or wiper blade.

The item comes from a group of used parts, which means it has been previously used but is still suitable for further use when installed correctly. This solution allows for an economical repair while maintaining the original component specification.

Integration with other wiper system components

The cover works with the rear wiper arm and the drive mechanism, creating a coherent system responsible for cleaning the rear window. A correctly selected element limits the ingress of contaminants into the mounting zone, which can positively affect the durability of the entire assembly.

If you are planning a comprehensive repair or upgrade of the rear window area in your Mercedes and need other elements from the same group, such as arms, mounts, or additional covers, check the available parts in the Mercedes wiper arms category.

Technical support and knowledge about Mercedes operation

When performing service work on vehicles of this brand, it is worth using reliable sources of information regarding operation and equipment selection. For users interested in a broader context of maintaining cars with the star on the hood, the material describing the principles of caring for key engine components may be useful – you can find it in the article Reliability under the sign of the star – how to take care of engine equipment in popular Mercedes-Benz C and E-Class models?.

Summary

Mercedes W177 X156 Tailgate Windscreen Rear Wiper Arm Cover Trim is a dedicated component from the Wiper arms group, designed for operation in the rear part of the vehicle. It provides protection for the mechanism, improves the aesthetics of the rear window, and allows for maintaining factory component fit, representing a functional solution for users looking for original Mercedes parts on a reasonable budget.