Mercedes W221 Headlight Washer Cover Cap Left N/S Tanzanite Blue 359 A2218800505

Mercedes W221 Headlight Washer Cover Cap Left N/S Tanzanite Blue 359 is an original body component designed for installation on the driver's side. The part belongs to the Bumper inserts and covers group and allows for an aesthetic and technically correct finish of the headlight washer opening, maintaining a consistent look of the front bumper in the Tanzanite Blue Metallic – 359 shade.

Specifications and technical data

• SKU: A2218800505-TB
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2218800505
• Substitutable numbers: A2218800505, A 221 880 05 05
• Location on the vehicle: Left
• Color: Tanzanite Blue Metallic - 359
• Category: Bumper Inserts & Covers

Purpose and function of the component

The presented cover cap is dedicated to the headlight washer system in the Mercedes S-Class W221 generation model, on the left side. It is responsible for covering the washer extension mechanism and its nozzle, ensuring the bumper maintains a uniform line while protecting sensitive components from dirt and mechanical damage.

The element works with the factory washer mechanism, ensuring proper extension and retraction of the nozzle during system operation. A correctly selected and installed cover cap limits the risk of water, salt, and fine debris entering the bumper, which contributes to a longer service life of the entire system.

Color and visual fit

The Tanzanite Blue Metallic – 359 color is a distinctive, deep shade of blue with a metallic effect, used as a factory finish in selected Mercedes paint configurations. Using an original cover cap in this color allows for maintaining the visual consistency of the vehicle's front without the need for additional painting or color matching.

Precise matching of the shape and mounts to the W221 bumper facilitates installation and ensures stable seating of the component. As a result, the bumper line remains even, and the gaps between the cover cap and the bumper are minimal and in line with factory styling specifications.

Installation characteristics

The left headlight washer cover cap is designed as a component compatible with the factory mounting system in the W221 bumper. Properly shaped clips and the external profile allow for installation in place of the original part without the need for structural modifications.

Placement on the left side requires attention to compatibility with the specific side of the vehicle – using the correct component minimizes the risk of leaks, improper washer extension, or rubbing against the bumper edges. In practice, this translates to the correct operation of the headlight washing system and stable retention of the component during use.

Condition and service application

The part comes from the secondary market, making it an attractive solution for vehicle service when the priority is to maintain original geometry and color at reasonable repair costs. Replacing a damaged or missing cover cap allows for restoring the full functionality of the headlight washer system and the aesthetics of the front bumper after a collision, scrape, or workshop intervention.

Using original elements from this group is particularly important in premium class vehicles, where both the precision of fit and visual consistency with other body components are essential.

Expanding bumper zone upgrades

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

Additional knowledge and inspiration

While working on exterior body elements, many users also decide to refresh the cabin using components from the secondary market. If you are considering improving the comfort and appearance of your car's interior, it is worth checking out our guide on selecting second-hand seats, steering wheels, and multimedia: Premium interior for half the price: second-hand seats, steering wheels, and multimedia.