Mercedes W204 W212 M156 Rear Axle Differential 2.82 Ratio A2043503314 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 W212 M156 Rear Axle Differential 2.82 Ratio is an original drivetrain component from the Differentials category, designed for installation on the vehicle's rear axle. Thanks to its precisely selected 2.82 ratio, it ensures stable torque transfer, supporting dynamic yet predictable vehicle handling. This is a solution for users expecting a proven design and compliance with Mercedes factory drivetrain specifications.

Specifications and technical data

• SKU: A2043504714
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2043504714
• Substitutable numbers: A2043504714, A 204 350 47 14, A2043503314, A 204 350 33 14
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented rear axle differential is designed to operate in the rear of the vehicle, where it is responsible for distributing drive to the wheels and properly transferring engine power to the road surface. Its placement at the rear of the vehicle allows for optimal use of the drive characteristics, which translates into predictable car behavior during acceleration, engine braking, and cornering.

The 2.82 ratio is a configuration often chosen for higher-power vehicles, where it is important to combine flexibility at higher speeds with appropriate drivetrain refinement. This gear ratio selection promotes smoother engine operation during highway driving while maintaining adequate throttle response under typical road conditions.

Benefits of using a 2.82 ratio differential

Using a differential with this ratio allows for the optimization of driving characteristics in terms of comfort and stability. In practice, this means:

• lower engine RPM at higher speeds, which promotes quieter and more relaxed driving,
• more linear power delivery, facilitating traction control during dynamic acceleration,
• better compatibility with high-torque power units, typical for M156 versions.

For the user, this means a balanced compromise between dynamics and comfort, without the need to interfere with other drivetrain components.

Product characteristics and installation

The rear axle differential belongs to a group of components that directly affect vehicle safety and handling predictability. The design is prepared for operation in demanding load conditions, typical for rear-wheel drive in premium class cars. The product is sourced from dismantling, which allows for maintaining factory geometry and fitment for dedicated models, while reducing costs compared to new components.

When replacing a differential, it is crucial to maintain gear ratio compatibility with the factory configuration or to make an informed change based on the desired driving style. This component will work well both for standard replacement of a worn-out axle and for drivetrain modifications where consistency with engine parameters is a priority.

Gear ratio selection and technical aspects

The proper selection of a differential ratio has a direct impact on perceived dynamics, fuel consumption, and drivetrain refinement. In the case of the 2.82 ratio, the following are particularly noticeable:

• calmer engine behavior at constant speeds,
• smaller RPM jumps between gears,
• stable torque transfer to the rear axle at higher speeds.

If you want to better understand how the axle ratio affects driving characteristics and how to choose a differential for your driving style, it is worth checking out our expert guide: Dismantled drive axles and differentials – how to choose ratios for your driving style. You will find practical examples, definitions, and answers to frequently asked questions there.

Application in Mercedes vehicles and drivetrain expansion

The discussed rear axle is intended for Mercedes vehicles where the drivetrain is based on classic rear-wheel power transfer. By maintaining the factory design concept, it is a suitable choice for repairs, upgrades, or restoring a car to its original specification. In combination with a properly selected gearbox and other drivetrain elements, it allows for maintaining consistent, predictable vehicle behavior.

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