Mercedes W204 W212 Differential Bushing Rear Axle Mounting Left N/S A2043500215

The Mercedes W204 W212 Differential Mount Bush is a specialized rear suspension component responsible for the stable seating of the differential within the vehicle's body. Thanks to its precise geometry and compatibility with the rear axle construction, it ensures controlled load transfer and reduces drivetrain vibrations, leading to smoother, more predictable handling. This solution is designed for users who expect confident handling and proper main gear operation in their mid-range and executive Mercedes vehicles.

Specifications and technical data

• SKU: A2043500215
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2043500215
• Substitutable numbers: A2043500215, A 204 350 02 15, BG
• Location on the vehicle: Rear, Left
• Category: Additional Differential Parts

Vehicle Application and Placement

The differential mount bush described has been designed for installation in the rear of the vehicle, on the left side. It is responsible for maintaining the differential in the correct position relative to the body and drive shafts, which is crucial for:

• precise control of driven wheels under varying loads,
• reducing play and unwanted movement of the main gear,
• minimizing the transfer of vibrations and noise from the drivetrain to the cabin.

Proper seating of the differential on the rear left bush contributes to the stability of the entire drivetrain, especially during dynamic acceleration, engine braking, and driving over uneven surfaces.

Technical and Functional Characteristics

The differential mount bush operates in a demanding environment, handling longitudinal and transverse forces while damping vibrations generated by the gearbox and driveshaft. Its function is to:

• maintain a constant geometric position of the differential relative to the suspension,
• compensate for micro-movements resulting from drivetrain operation,
• protect other rear suspension components from excessive impact loads.

Thanks to the appropriately selected stiffness of the supporting element and the flexible part, the bush strikes a balance between ride comfort and handling precision. In practice, this translates to more stable vehicle behavior under load changes and a reduced risk of knocks and vibrations in the rear of the body.

Application in Mercedes Drivetrain

This component belongs to the group of Differential Bearings, which are responsible for supporting and guiding the main gear. In mid-range and executive Mercedes vehicles, the proper condition of the differential mount directly impacts:

• smooth operation of the drivetrain,
• even wear of drive shafts and suspension components,
• noise reduction at low and medium rotational speeds.

Replacing a worn bush with a functional part restores the factory operating parameters of the rear drivetrain, which is particularly important for vehicles with higher mileage or those used under increased load conditions.

Benefits of Using an Original Mercedes Solution

Using a dedicated differential mount for Mercedes W204 and W212 series ensures:

• precise fit to factory mounting points without the need for modifications,
• maintenance of the rear suspension characteristics as intended by the manufacturer,
• compatibility with other drivetrain and rear axle suspension components.

For the user, this means predictable vehicle behavior, stability at higher speeds, and a reduced risk of secondary damage to other components resulting from improper differential support.

Integration with Other Rear Drivetrain Components

The differential mount bush works in conjunction with other main gear support points and rear suspension components. If you experience noticeable knocks, vibrations, or play in the rear axle area, a comprehensive diagnosis of the entire system is recommended. If you are planning a comprehensive repair or upgrade of the rear drivetrain area in your Mercedes and need other parts from the same group, such as additional mounts, brackets, or main gear support elements, check the available parts in the category Mercedes Differential Bearings.

For drivers interested in a broader perspective on vehicle operation in demanding temperature conditions, including the impact of high temperatures on component durability, our guide may be useful: Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings.