Mercedes R172 SLK250 CDI BE Rear Axle Differential Diff 2:47 1723508000 WARRANTY

Listing details

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

Mercedes R172 SLK250 CDI BE Rear Axle Differential Diff 2:47 is an original drivetrain component from the Differentials category, designed for installation on the vehicle's rear axle. It ensures proper torque transfer to the wheels, stable drivetrain operation, and predictable vehicle behavior during acceleration and load changes. This solution is dedicated to users expecting factory gear ratio geometry and consistency with Mercedes drivetrain characteristics.

Specifications and technical data

• SKU: A2033503474
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2033503474
• Substitutable numbers: A2033503474, A 203 350 34 74, 1723508000, A1723508000
• Location on the vehicle: Rear
• Category: Differentials

Purpose and function in the drivetrain

The presented rear axle is structurally matched to the Mercedes drive axle, where it is responsible for distributing drive to the left and right wheels and maintaining the correct gear ratio. Its location in the rear section of the vehicle means this component works in direct connection with the driveshaft and half-shafts, influencing:

• smoothness of acceleration and downshifting,
• traction stability at higher speeds,
• acoustic comfort in the cabin,
• perceptible dynamics across the entire rev range.

Selecting a differential with the correct gear ratio is crucial for maintaining factory driving parameters, transmission operation, and driver assistance systems.

Advantages of using an original Mercedes differential

The original Mercedes differential ensures consistency with the factory drivetrain design, which translates into predictable vehicle behavior under all conditions. This component has been designed for a specific rear axle configuration, thanks to which:

• proper cooperation with vehicle electronics (traction control, stability systems, ABS) is maintained,
• there is no need to interfere with controller software regarding gear ratios,
• factory acceleration characteristics and engine RPM at a given speed are preserved.

Choosing a used, original differential from this series is a cost-effective solution that is also technically matched to Mercedes' design requirements.

Installation and operational characteristics

The rear differential intended for installation on the Mercedes rear axle is designed as a component that works with factory mounting points. This allows for the preservation of:

• correct suspension and drivetrain geometry,
• alignment of the connection with the driveshaft,
• proper half-shaft guidance and minimization of stress in the system.

With proper installation and the use of the correct gear oil, the differential ensures stable, repeatable operation over a long service life. This is particularly important in vehicles with higher curb weight and torque, where loads on the rear axle are significant.

Gear ratio selection and vehicle compatibility

The differential gear ratio has a direct impact on driving characteristics – engine RPM at a given speed, flexibility, and economy. In the case of a Mercedes, using the correct rear axle allows for maintaining factory settings without the need to modify other components. To select a differential for your driving style and drivetrain configuration, it is worth using the practical tips included in the article Dismantled drive axles and differentials – how to choose gear ratios for your driving style, where the relationships between gear ratio, dynamics, and comfort are discussed.

Technical support and additional information

If you are considering replacing a worn or noisy rear axle with an original dismantled component and want to better understand why a used OEM differential is often a better choice than a random replacement, check out the guide Humming differential? Find out why a used OEM drive axle is a better investment than an uncertain replacement. You will find practical tips there regarding diagnostics, selection, and operation of such components.

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 differential housings, driveshafts, or half-shafts, check out the available parts in the Mercedes Differentials category.