Mercedes W204 W205 W212 Rear Differential Diff 3,07 Ratio 2043507400 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 Differential Diff 3,07 Ratio is an original drivetrain component from the Differentials category, designed for installation on the rear axle of selected Mercedes models. The precisely selected 3.07 gear ratio ensures the correct drivetrain characteristics, stability, and driving comfort, while simultaneously reducing unwanted vibrations and noise.

Specifications and technical data

• SKU: A2043500614
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2043500614
• Substitutable numbers: A2043500614, A 204 350 06 14, A2043501700, A 204 350 17 00, 2043507400, A2043507400, A 204 350 74 00, A2043507895, A 204 350 78 95, A2043501914, A 204 350 19 14, A2043503800, A 204 350 38 00, A2043500812, A 204 350 08 12, A2043501704, A2043505716, 2043505801
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the differential

The rear drive axle with a 3.07 gear ratio differential is responsible for distributing torque between the rear wheels and compensating for rotational speed differences when cornering. In mid-size and premium Mercedes vehicles, this is crucial for driving stability, predictable body behavior, and effective power transfer to the road surface.

This component is particularly important in higher-power vehicles, where resistance to dynamic loads and consistent performance across a wide speed range are required. The properly selected 3.07 ratio supports both highway driving and daily urban use.

Key technical and operational features

The rear differential assembly is designed for rear-axle installation, maintaining the factory suspension and drivetrain geometry. Based on the original Mercedes design, it ensures:

• compatibility with the factory drivetrain and vehicle electronics,
• a stable 3.07 gear ratio matched to the engine and transmission characteristics,
• the ability to operate under a wide range of loads typical for daily use.

An additional advantage is the presence of numerical equivalents and interchangeable part numbers, which facilitates selecting the correct axle for a specific vehicle configuration based on manufacturer catalogs and service documentation.

Application in Mercedes models and gear ratio selection

The presented rear differential is intended for selected versions of the Mercedes W204, W205, and W212 that utilize a 3.07 gear ratio. When selecting this component, it is worth paying attention to:

• the compatibility of the gear ratio with the factory engine and transmission specifications,
• the type of drivetrain (rear-wheel drive) and suspension configuration,
• OEM part numbers and interchangeable numbers assigned to the specific vehicle version.

This approach allows for maintaining proper acceleration dynamics, correct engine RPM at cruising speeds, and predictable vehicle behavior under the road conditions for which it was designed.

To better understand how the 3.07 gear ratio affects driving characteristics and what the differences are between individual drive axles, we recommend reading our guide: Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

Benefits of choosing a used rear differential

Choosing a used rear differential for a Mercedes is a solution that significantly reduces repair costs while maintaining the original OEM design. In practice, this means:

• retaining factory fitment for mounts and half-shafts,
• no need for drivetrain modifications,
• the possibility of an economical repair in the event of axle failure or excessive gear wear.

For drivers who also want to consider the environmental and economic aspects of vehicle maintenance, we recommend the article: Eco-driving: discover the benefits of used car parts, which describes the advantages of using dismantled parts in modern vehicles.

Professional application in the Mercedes drivetrain

The rear differential with a 3.07 ratio is a component dedicated to operation in the rear of the vehicle, where it is responsible for stable power transmission and cooperation with safety systems (including traction control and electronic stability control). A correctly selected and installed differential minimizes the risk of improper tire wear, reduces drivetrain stress, and supports smooth gear shifting.

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

Summary

Mercedes W204 W205 W212 Rear Differential Diff 3,07 Ratio is a technically matched rear drivetrain component that helps restore proper drive performance in selected Mercedes models. The appropriate gear ratio, rear-axle installation, and compliance with the vehicle's factory design make this a particularly beneficial solution for professional repairs or replacing a worn-out axle in vehicles of this brand.