Mercedes W166 Rear Door Tweeter Speaker Cover Trim Cover Left N/S A1667370788

Mercedes W166 Rear Door Tweeter Speaker Cover Trim Cover Left N/S is an original interior trim component designed for installation in the rear left door area. Thanks to its factory-fit for this specific Mercedes generation, it ensures a consistent door upholstery look and proper seating of the tweeter without the need for any modifications.

Specifications and technical data

• SKU: A1667370788
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1667370788
• Substitutable numbers: A1667370788, A 166 737 07 88
• Location on the vehicle: Rear, Left
• Category: Door Panels

Application and fitment for Mercedes W166

The described cover is intended for installation in the rear left door section of Mercedes W166 series models. The component was designed as part of the factory sound system, meaning its geometry, mounting method, and hole pattern are tailored to the original tweeter and the profile of the upholstery.

This provides you with:

• secure, stable mounting in factory mounting points,
• an aesthetic finish for the surface around the speaker,
• preservation of the uniform interior design line characteristic of the Mercedes brand.

Function in the sound system and door upholstery

The tweeter speaker cover serves a dual role – it protects the delicate driver from mechanical damage and acts as an integral part of the Door upholstery. The properly designed hole pattern and surface profile allow for unobstructed sound flow while reducing the risk of accidental contact with the speaker diaphragm.

Such a solution:

• helps maintain stable acoustic parameters in the rear of the cabin,
• increases the speaker's resistance to daily use (closing doors, contact with clothing, hand luggage),
• allows for maintaining the factory character of the interior without visible modifications.

Characteristics of the used component

The offered cover is a used component, sourced from dismantling. This means it retains the original manufacturer's specifications while providing an economical solution for repairing or completing missing parts in the door upholstery. In practice, this allows for restoring the completeness of the rear left door trim without the need to invest in a new component.

For many Mercedes W166 users, this is a reasonable compromise between quality and cost, especially in the case of spot repairs, such as replacing a single speaker cover.

Benefits of using an original cover

Using an original trim component in the rear left door area translates into several practical benefits:

• Factory fitment – no need for adjustments, trimming, or custom mounting modifications.
• Consistent interior aesthetics – compatibility of texture and lines with other upholstery elements.
• Compatibility with the factory tweeter – maintaining the correct position relative to the cover holes.
• Possibility of quick replacement of a damaged or missing element without interfering with the door structure.

Mercedes door upholstery – expansion and completion

If you are planning a comprehensive repair or upgrade of the door area in your Mercedes and need other elements from the same group, such as door panels, decorative strips, or additional speaker covers, check the available parts in the Mercedes door upholstery category.

Why choose original used parts?

Choosing original, used trim components for a Mercedes is often the best way to maintain a high-quality interior at reasonable costs. Parts sourced from dismantling are designed according to the vehicle manufacturer's requirements, which translates into fitment, durability, and predictable performance during operation.

If you want to better understand why original used parts can be a safe and cost-effective solution for car repairs, it is worth reading the article OEM quality assurance and safety – why used original car parts are the best choice for your car?, which discusses this topic more broadly in the context of daily vehicle operation.