Mercedes W639 Driveshaft Rear Axle Drive Shaft Left Right N/O/S A6393501210

Mercedes W639 Driveshaft Rear Axle Drive Shaft Left Right N/O/S is a drivetrain component designed for the rear axle of Mercedes vehicles with a gasoline engine. It enables efficient torque transfer from the final drive to the wheels, ensuring stable traction and predictable vehicle handling. A used component from this group is a reasonable, technically sound choice for maintenance repairs and drivetrain servicing.

Specifications and technical data

• SKU: A6393501210
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6393501210
• Substitutable numbers: A6393501210, A 639 350 12 10
• Location on the vehicle: Rear, Right, Left
• Fuel type: Petrol
• Category: Driveshafts

Purpose and function in the drivetrain

The rear driveshaft in Mercedes W639 models operates under demanding conditions, transferring dynamic loads during acceleration, engine braking, and driving with a load. The presented driveshaft is designed for installation on the rear axle, with the possibility of use on either the right or left side, which facilitates selection during service repairs.

In combination with the differential and wheel hub, this component is responsible for:

• stable torque transfer to the rear wheels,
• maintaining the correct geometry of the drivetrain,
• reducing vibrations and noise within the rear axle area.

Compatibility with gasoline engines

The described driveshaft is intended for versions with a gasoline engine, which is important when selecting parts based on the loads and operating characteristics of the drivetrain. Proper matching to the fuel type ensures correct cooperation with the final drive and adequate component durability.

For a reliable selection, it is recommended to verify compatibility with the specific vehicle version based on the OEM part number or interchangeable numbers available in the technical specification – this minimizes the risk of mismatching length, splines, or mounting type.

Application in service practice

A used rear driveshaft for the Mercedes W639 will prove particularly useful in situations where:

• the existing driveshaft has suffered from operational wear (play, knocking, vibrations),
• mechanical damage has occurred following a collision or suspension failure,
• an economical repair of the drivetrain is necessary while maintaining parameters close to factory specifications.

Choosing an original dismantled component allows for maintaining the factory operating characteristics of the drivetrain without the need to use replacements with uncertain parameters.

Professional selection and technical knowledge

To better understand the relationships between the driveshaft, final drive, and differential, and to select gear ratios for your driving style, it is worth checking out our expert guide: Dismantled final drives and differentials – how to choose gear ratios for your driving style. The article discusses definitions, component compatibility, and practical examples of applications in rear-wheel-drive vehicles in an accessible way.

If you are interested in a broader context of using second-hand drivetrain components and want to learn reliable technical and economic arguments, the following material will also be helpful: Why it is worth buying used gearboxes and engines – facts instead of myths. You will find there procedures for selection by OEM numbers, a discussion of costs, and practical tips that can also be applied to other drivetrain components.

Expanding repairs within the drivetrain system

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 additional driveshafts, connecting elements, or components cooperating with the differential, check out the available parts in the Mercedes Driveshafts category.