Mercedes W204 W205 W212 Rear Axle Differential Diff 3,07 A2043505459 WARRANTY

Listing details

The differential is sold with a 90-day warranty! It was tested before removal and is in full working order.

Mercedes W204 W205 W212 Rear Axle Differential Diff 3,07 is an original rear drive unit from the Differentials category, designed for installation in the rear axle of selected mid-size Mercedes models. This solution allows for maintaining the correct drive ratio, stable traction, and predictable vehicle behavior during both daily and more dynamic driving.

Specifications and technical data

• SKU: A2123501414
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2123501414
• Substitutable numbers: A2123501414, A 212 350 14 14, A2043505459, A 204 350 54 59, A2043502214, A 204 350 22 14
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the differential

The described rear differential is a component of the drivetrain responsible for distributing torque to the rear wheels and compensating for rotational speed differences when cornering. A properly selected gear ratio, in this case 3.07, affects acceleration characteristics, engine RPM at cruising speeds, and overall driving comfort.

The solution used in this drive axle is typical for rear-wheel drive and some all-wheel drive versions, ensuring stable handling, predictable throttle response, and correct integration with the vehicle's factory electronics.

Compatibility with Mercedes models

This rear differential has been designed for Mercedes C-Class and E-Class platforms, such as the W204, W205, and W212. This means it is structurally matched to factory mounting points, suspension geometry, and stock half-shafts and driveshafts. As a result, installation in the appropriate model proceeds in an orderly manner, without the need for modifications to the body or suspension structure.

For certainty of selection, it is recommended to verify compatibility using the OEM part number and interchangeable numbers, as well as to compare the drive type and engine version of the vehicle. This approach minimizes the risk of mismatch and guarantees that the differential will work properly with the existing drivetrain.

Technical characteristics and positioning

The drive axle belongs to the Differentials category and is intended for installation in the rear of the vehicle. Its position on the rear axle determines its role in weight distribution and its impact on vehicle behavior during acceleration, engine braking, and cornering. The differential design is optimized for compatibility with factory suspension and stock drivetrain components.

The 3.07 ratio is a compromise between dynamics and fuel economy – it allows for maintaining reasonable engine RPM at highway speeds while providing adequate acceleration response in typical road conditions. This type of configuration is often chosen for cars used both in the city and on the highway.

Condition, origin, and installation recommendations

The differential is a used part, which in practice means it has been removed from a vehicle and verified for further serviceability. Such components are popular as an economical alternative to new parts, especially for drivetrain repairs in older vehicles.

During installation, it is recommended to:

• check the tightness of connections and the condition of seals,
• replace the differential oil with fresh fluid that meets the vehicle manufacturer's specifications,
• verify the condition of mounts, bushings, and suspension components in the vicinity of the drive axle,
• check the interaction with half-shafts and the driveshaft after installation is complete.

Benefits of using an original differential

Using an original differential in a Mercedes vehicle allows you to maintain factory handling characteristics, proper operation of safety systems, and predictable drivetrain behavior in various road conditions. A properly selected drive axle reduces the risk of unwanted vibrations, noise, or uneven tire wear.

For users who want to better understand the impact of gear ratios on dynamics and driving comfort, the following guide will be helpful: Used drive axles and differentials – how to choose ratios for your driving style, which discusses practical aspects of differential selection, differences in ratios, and typical questions related to replacing this component.

If you are planning a comprehensive repair or upgrade of the drivetrain in your Mercedes and need other components from the same group, such as drive axles, rear gearboxes, or complete differential units, check the available parts in the Mercedes Differentials category.