Mercedes W639 Automatic Gearbox 722686 722.686 A6392703500 WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order.

Mercedes W639 Automatic Gearbox 722686 722.686 A6392703500 WARRANTY is a complete, used transmission from the Automatic gearboxes segment, designed for vehicles with a diesel engine. It is a solution for users expecting a proven, factory-spec automatic design that ensures smooth gear shifting and comfortable operation in daily driving.

Specifications and technical data

• SKU: A6392703500
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6392703500
• Substitutable numbers: A6392703500, A 639 270 35 00, A6392703600, A 639 270 36 00
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and technical specifications

The offered automatic transmission has been designed specifically for use with Diesel engines, meaning the gear ratios are adapted to the high torque typical of diesel units. The Automatic transmission type ensures fully automated gear changes without the need for a clutch pedal, which translates into driving convenience in both city traffic and on the highway.

The design of this gearbox belongs to the family of automatic transmissions used in Mercedes commercial and passenger-commercial models of the W639 generation, which in practice means optimized gear ratios for load, frequent starts, and operation in varied road conditions.

Benefits of using an original Mercedes automatic transmission

Using an original automatic transmission in a Mercedes vehicle allows you to maintain the factory performance characteristics of the drivetrain. Key advantages include:

• Consistent cooperation with the Diesel engine – properly selected gear ratios and shift logic.
• Stable, predictable vehicle behavior during acceleration, engine braking, and driving under load.
• The ability to use factory service and diagnostic procedures, which facilitates workshop maintenance.
• Reduced risk of compatibility issues compared to aftermarket replacements of uncertain origin.

For fleet users and professional carriers, repeatability of operating parameters is particularly important, which translates into predictable operating and maintenance costs.

Condition, selection, and installation of the gearbox

The offered transmission comes from the used parts segment, which allows for a significant reduction in repair costs compared to purchasing a new component, while maintaining the factory design. It is always worth confirming the selection of the gearbox for a specific vehicle based on the manufacturer's markings and vehicle data to ensure full mechanical and electronic compatibility.

During installation, it is recommended to:

• perform a professional oil change in the automatic transmission along with the filter,
• check the transmission oil cooling system,
• perform adaptation and basic settings using an appropriate diagnostic tester.

This approach minimizes the risk of improper operation after installation and allows you to fully utilize the potential of this automatic transmission.

Mercedes automatic transmissions – expansion and compatibility

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 a torque converter, control elements, or additional hydraulic components, check the available parts in the Mercedes automatic transmissions category.

When selecting a used automatic transmission, procedures based on manufacturer markings and vehicle data are particularly helpful. To better understand the differences between individual transmission variants, the cost-effectiveness of purchasing used parts, and the principles of safe selection, it is worth reading the guide Why it is worth buying used gearboxes and engines – facts instead of myths, which discusses practical examples and the most frequently asked user questions.

Summary

Mercedes W639 Automatic Gearbox 722686 722.686 A6392703500 WARRANTY is a functional solution for drivers and workshops looking for an original, used transmission for vehicles with a Diesel engine. The automatic transmission type ensures ease of operation, and the design adapted to the specifics of this Mercedes generation allows for maintaining proper performance and drivetrain refinement. It is a sensible choice when repairing or replacing a damaged transmission, combining technical correctness with control over service costs.