Mercedes W221 Headlight Washer Cover Cap Left N/S Obisidian Black A2078800105

Mercedes W221 Headlight Washer Cover Cap Left N/S Obisidian Black is an original body component from the Bumper inserts and covers category, designed for installation on the left side of the vehicle. The part in the factory color Obsidian Black Metallic – 197 allows for maintaining visual consistency with the body paint and restoring the aesthetics of the front bumper after repair or replacement of a damaged element. The used OEM component ensures proper fitment to the bumper and correct operation of the headlight washer extension mechanism.

Specifications and technical data

• SKU: A2218800505-OB
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218800505
• Substitutable numbers: A2218800505, A 221 880 05 05
• Location on the vehicle: Left
• Color: Obsidian Black Metallic - 197
• Category: Bumper Inserts & Covers

Purpose and function of the component

The presented cover cap is dedicated to the front bumper of the Mercedes S-Class W221 generation, on the left side. It is responsible for the aesthetic finish of the headlight washer opening while simultaneously protecting the mechanism from direct exposure to external factors. Thanks to its precise shape and correct profile, it works in tandem with the washer arm, opening and closing along with its extension.

An element of this type is significant both visually and functionally – the absence of the cover or its improper fitment can cause a disruption in the bumper line, increased dirt accumulation on the washer mechanism, and exposure to mechanical damage.

Color and paint matching

The cover cap is finished in Obsidian Black Metallic – 197, which is one of the popular metallic black shades used in premium Mercedes models. The use of original factory paint allows for:

• maintaining a uniform color of the bumper and the entire front of the vehicle,
• reducing the need for additional painting when replacing the element,
• maintaining the characteristic metallic light reflection effect.

For vehicle owners in this color, this is a particularly beneficial solution, as it enables quick and aesthetic replacement of a damaged cover cap without interfering with other bumper elements.

Installation characteristics

The headlight washer cover cap has been designed to operate on the left side of the vehicle, which means its geometry, clips, and crease lines are matched to the specific side of the bumper. In practice, this translates into:

• proper fitment with the bumper surface,
• correct positioning relative to the washer arm,
• stable mounting without play or excessive stress.

As an OEM element from the Bumper inserts and covers group, the cover cap works with the factory headlight washer mechanism, which facilitates installation and minimizes the risk of system operation issues.

Condition and benefits of choosing a used OEM part

The offered cover cap is a used part, sourced from the dismantling of a Mercedes vehicle. Choosing an original second-hand component is a solution that allows you to combine:

• factory fitment and dimensional compliance,
• preservation of the original styling line of the car's front,
• rational repair costs compared to new elements.

For many premium car users, this is a reasonable compromise between quality and budget, especially for repairs of bumpers and trim elements, where both appearance and correct mechanism operation matter.

Repair expansion and additional information

If you are planning a comprehensive repair or upgrade of the front bumper area in your Mercedes and need other elements from the same group, such as covers, inserts, or additional grilles, check the available parts in the Mercedes Bumper inserts and covers category.

To better understand why original used components for premium brands are becoming an increasingly chosen solution for body and trim repairs, it is worth reading the article Crisis in the new parts market? Why used originals for premium cars (BMW, Mercedes, Porsche) are the hottest trend in 2026.