Mercedes-Benz E-Class W207 Cabrio A207 Diesel Exhaust Box Muffler Left N/S

Mercedes-Benz E-Class W207 Cabrio A207 Diesel Exhaust Box Muffler Left N/S is an original exhaust system component, designed specifically for the convertible version. Thanks to its factory design, it ensures proper exhaust gas flow, appropriate acoustics, and maintains the characteristic operation of the diesel unit. This used component allows for a technically correct repair without the need for aftermarket replacements with uncertain parameters.

Specifications and technical data

• SKU: A2074908321
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2074908321
• Substitutable numbers: A2074908321, A 207 490 83 21, BG
• Weight: 150
• Location on the vehicle: Left
• Fuel type: Diesel
• Color: Grey
• Category: Mufflers & Resonators

Purpose and fitment for Mercedes-Benz E-Class W207 Cabrio

The presented muffler has been developed for the exhaust system of the W207 generation E-Class convertible with a diesel engine. The component is mounted on the left side of the vehicle, which is important for both the pipe routing geometry and the proper positioning of the box relative to the body and suspension. Using a dedicated muffler allows for the retention of factory mounting points, proper ground clearance, and collision-free integration with other exhaust components.

The grey finish is typical for steel exhaust system components and blends well with the factory heat shield and other chassis parts. As a result, the replacement does not introduce visual differences in the rear floor area.

Technical characteristics and role in the exhaust system

As an item in the Mufflers and Resonators category, this exhaust box is responsible for the final stage of noise suppression generated by the diesel engine and for shaping the backpressure in the system. A properly selected muffler:

• stabilizes exhaust gas flow in the final part of the system,
• reduces vibrations transmitted to the body,
• supports the maintenance of factory noise levels,
• helps preserve the characteristic sound of the powertrain.

The original design intended for the diesel engine ensures appropriate resistance to temperature and the chemical composition of exhaust gases, which translates into predictable performance over a long service life.

Condition, application, and benefits of installation

The offered muffler is a used component, which allows for an economical yet technically correct repair of the exhaust system in a Mercedes E-Class W207 Cabrio. In many cases, this is a beneficial solution when:

• replacing a damaged box due to collision or corrosion,
• restoring factory acoustics after the use of non-factory solutions,
• servicing youngtimers, where maintaining the original specification is key.

Using an original muffler on the left side helps avoid problems with fitment, leaks, or improper alignment of the exhaust tips relative to the bumper. This is particularly important in a convertible, where acoustic comfort and the absence of unwanted resonances are significant for the perceived ride quality.

Support for restoration and modernization

Owners of E-Class W207 models from years approaching youngtimer status often combine muffler replacement with a wider range of exhaust system work. In such a scenario, used, original components allow for maintaining the technical consistency of the entire system. If you want to better plan the refreshment of your Mercedes or another car from this period, the article describing a practical approach to restoration based on used parts may be helpful: The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 era.

If you are planning a comprehensive repair or modernization of the exhaust system area in your Mercedes and need other components from the same group, such as additional boxes, resonators, or end sections, check the available parts in the Mercedes Mufflers and Resonators category.