Mercedes W251 Rear Axle Differential Diff 2,92 Ratio A1643501614 WARRANTY

Listing details

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

Mercedes W251 Rear Axle Differential Diff 2,92 Ratio is a component from the Differentials category, designed for the vehicle's rear axle. It ensures proper torque distribution between the wheels, which translates into stable handling and predictable vehicle behavior. This is a solution for users looking for a proven, used component with a specific gear ratio, matched to the design of the Mercedes rear-wheel drive system.

Specifications and technical data

• SKU: A1643501614
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1643501614
• Substitutable numbers: A1643501614, A 164 350 16 14
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function of the rear differential

The presented drive axle is designed to operate in the rear part of the drivetrain, where it is responsible for differentiating the rotational speed of the wheels and transferring torque from the driveshaft to the wheel hubs. Its rear-mounted position allows for stable cooperation with the suspension and traction control system, which is important during both calm and more dynamic driving.

Choosing a differential with a specific gear ratio has a direct impact on acceleration characteristics, flexibility in higher gears, and driving comfort at highway speeds. A properly matched drive axle helps maintain the factory operating parameters of the drivetrain, reduces unwanted stress, and supports even wear of cooperating components.

Benefits of using an original Mercedes differential

Using a differential from Mercedes allows for maintaining the structural integrity of the entire drivetrain. The original component is designed with specific suspension geometry, engine characteristics, and auxiliary systems such as traction control or electronic stability control in mind. As a result, installing such a component makes it easier to maintain predictable vehicle behavior in various road conditions.

The main advantages of using this type of rear axle include:

• Compatibility with factory design – perfect fit for the mounts, half-shafts, and driveshaft intended for the given model.
• Consistent gear ratio characteristics – maintaining parameters close to factory specifications, which facilitates the operation of the gearbox and electronic systems.
• Stable vehicle handling – proper torque distribution between the rear wheels, which is particularly important during load changes and on slippery surfaces.

Condition, origin, and practical application

The offered differential is a used part, sourced from dismantling, which provides an attractive solution for users looking for a cost-effective component while maintaining original specifications. This type of component is particularly useful for repairs after mechanical damage to the axle, replacement due to excessive wear, or when adjusting the gear ratio to match the car's characteristics to the driver's individual expectations.

In practice, it is recommended to have such a differential installed by a specialized workshop, which will verify the correct selection against the engine version, gearbox type, and drive configuration. Professional installation reduces the risk of noise, vibrations, or premature wear of cooperating parts.

How to choose the right axle and differential for your driving style

When choosing a differential, it is worth considering how the car is used – city driving, high-speed routes, or towing a trailer and intensive use under full load all have different requirements. It is crucial to match the gear ratio to the engine's characteristics and the expected compromise between acceleration and RPM at cruising speeds.

To better understand the relationship between axle ratio, vehicle dynamics, and driving comfort, it is worth consulting a specialist guide. A detailed discussion of the topic, along with configuration examples and practical tips, can be found in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style.

Expanding the drivetrain in a Mercedes – related components

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