Underfloor Cover Mercedes W164 W251 Sound Insulation Engine Diesel A2515200255

Visual condition of the part

The product shows signs of use visible in the photos.

Underfloor Cover Mercedes W164 W251 Sound Insulation Engine Diesel is a factory-made engine bay soundproofing component, designed specifically for diesel engine models. The carefully selected material structure helps reduce the transmission of noise and vibrations into the cabin, improving acoustic comfort and the engine's operating refinement. This is a practical solution for users who want to maintain the original characteristics of their Mercedes while keeping costs reasonable.

Specifications and technical data

• SKU: A2515200255
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2515200255
• Substitutable numbers: A2515200255, A 251 520 02 55
• Fuel type: Diesel
• Category: Door Panels

Purpose and function of the acoustic cover

The presented Underfloor Cover Mercedes W164 W251 Sound Insulation Engine Diesel has been developed for the engine bay in Mercedes W164 and W251 class vehicles with diesel units. Its purpose is to:

• dampen noise generated by the diesel engine,
• reduce the transmission of vibrations to the body and interior,
• provide stable protection for selected engine bay components against direct external factors,
• maintain the factory standard of acoustic comfort characteristic of the Mercedes brand.

Thanks to the use of the original design, the cover works with factory mounting points, which facilitates installation and allows for consistency with other engine bay components.

Benefits of using original insulation in a Mercedes

In vehicles with a diesel engine, proper soundproofing is essential for perceived driving comfort. Using a dedicated acoustic cover allows you to:

• reduce noise levels in the cabin during acceleration and steady-speed driving,
• preserve the characteristic, subdued sound of the Mercedes engine,
• limit the transmission of resonances and unwanted sounds to body components,
• maintain a consistent, orderly appearance of the engine bay.

This solution is particularly recommended when replacing damaged, deformed, or missing factory insulation, when you want to maintain the vehicle's original acoustic parameters.

Product characteristics and condition

The cover comes from a group of finishing elements that functionally correspond to parts in the Door Upholstery category, i.e., components that improve comfort, soundproofing, and aesthetics in the vehicle. The product is in used condition, which means it may show signs of wear typical of dismantled parts, while maintaining full installation and functional utility. This type of element is a good choice for drivers looking for an original solution at a reasonable price, without the need to resort to replacements with uncertain parameters.

Thanks to the preservation of factory geometry and fitment to the engine bay structure, installation proceeds in a predictable manner for an experienced mechanic or a service center specializing in the Mercedes brand. Proper positioning of the cover is crucial for achieving the expected noise-dampening effect and stable mounting.

Application in vehicles with a Diesel engine

The presented insulation is intended for vehicles with a Diesel engine, where the generated noise has different characteristics than in gasoline units. The cover's design has been adapted to the specifics of diesel engine operation, which allows for more effective reduction of the combustion and accessory noises typical for them. Replacing worn or damaged insulation with an original element of this type is recommended especially when:

• the noise level from the engine bay area has noticeably increased in the vehicle cabin,
• the existing cover has suffered mechanical damage or delamination,
• after bodywork or service repairs, it is necessary to restore the full set of soundproofing elements.

Technical support and additional information

When selecting soundproofing elements for a Mercedes, it is worth using original solutions that have been designed for a specific body generation and drive type. If you want to better understand why original used components of this brand are often the most cost-effective choice, read the article Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?.

If you are planning a comprehensive repair or upgrade of the soundproofing and interior finishing area in your Mercedes and need other elements from the same group, such as upholstery panels, soundproofing fillers, or door cards, check the available parts in the Mercedes Door Upholstery category.