Mercedes-Benz E-Class W212 W207 C207 A207 E350CDI Rear Differential Diff 2,24 Ratio WARRANTY

Mercedes-Benz E-Class W212 W207 C207 A207 E350CDI Rear Differential Diff 2,24 Ratio WARRANTY with a 2.24 gear ratio is a precision-engineered drivetrain component, dedicated to the rear axle of E-Class models equipped with a diesel engine. The carefully selected gear ratio ensures stable torque transfer, optimal fuel efficiency, and smooth drivetrain operation at higher speeds. This solution is designed for users who expect consistency with factory handling characteristics and the driving comfort typical of Mercedes-Benz.

Specifications and technical data

• SKU: A2123509214
• Mark: Mercedes (Genuine OE)
• OEM Part Number: A2123509214
• Substitutable numbers: A2123509214 A2073506903, A 212 350 92 14, A 207 350 69 03
• Location on the vehicle: Rear
• Category: Additional Differential Parts

Purpose and function in the drivetrain

The presented differential is designed for installation on the rear axle of the Mercedes-Benz E-Class generation W212, W207, C207, and A207 with the E350 CDI unit. It is responsible for distributing power to the rear wheels, stabilizing traction, and correctly matching the rotational speed of the driveshaft to the wheel speed, in accordance with the factory 2.24 gear ratio.

A differential configured in this way supports the characteristics of a high-torque diesel engine, ensuring:

• smooth acceleration without jerking,
• comfortable operation at highway speeds,
• balanced loads within the drivetrain.

Benefits of using an original differential

Using a differential with the correct gear ratio in the E350 CDI allows for maintaining factory acceleration and RPM parameters, which directly impacts the refinement of the drivetrain. The original design for the E-Class guarantees:

• proper interaction with vehicle electronics (stabilization systems, traction control),
• consistency with factory transmission settings,
• appropriate load distribution in the drivetrain and suspension.

As a result, this differential is highly recommended when replacing a worn or damaged component, especially if you want to maintain the original Mercedes-Benz driving characteristics without experimenting with different gear ratios.

Selection and vehicle compatibility

The differential has been designed specifically for the E-Class W212 / W207 / C207 / A207 platform with the E350 CDI unit, which simplifies part selection and minimizes the risk of installation issues. The product features a dedicated OEM part number and interchangeable numbers, allowing it to be precisely verified against service documentation or the manufacturer's catalog without the need for structural modifications.

This approach ensures:

• correct mounting points for the rear subframe and half-shafts,
• compatibility with factory driveshafts,
• proper fitment with suspension and braking system components.

Professional installation and operation

Due to the importance of the differential for safety and drivetrain durability, installation in a specialized workshop is recommended. This ensures proper tightening of connections, clearance checks, and correct filling with gear oil that meets Mercedes-Benz specifications. A correctly selected and installed differential reduces the risk of noise, vibrations, and uneven tire wear, while supporting long-term, stable operation of the drivetrain.

Drivetrain expansion and additional resources

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, mounts, or additional mounting hardware, check out the available parts in the Other Mercedes differential parts category.

When upgrading the drivetrain, many drivers also decide to refresh the cabin to improve ergonomics and driving comfort. You can find inspiration in this area in the article Car interior tuning with Global Parts, which describes practical possibilities for using second-hand seats and steering wheels in daily operation.