Mercedes ML W164 R W251 Automatic Gearbox 722903 722.903 A2512705201 WARRANTY

Listing details

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

Mercedes ML W164 R W251 Automatic Gearbox is an automatic transmission from the Automatic gearboxes family, designed for Mercedes vehicles with diesel engines. The used OEM construction ensures factory operating characteristics, maintaining proper gear ratios, smooth gear shifting, and compatibility with diesel-based powertrains.

Specifications and technical data

• SKU: A2512705801
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2512705801
• Substitutable numbers: A2512705801, A 251 270 58 01
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Automatic Transmission

Technical characteristics and intended use

The offered gearbox belongs to the Automatic gearboxes group dedicated to Mercedes ML W164 and R W251 models with diesel engines. The use of an automatic transmission allows for smooth torque transfer, stable operation across the full load range, and comfortable driving in both city and highway conditions.

The design is optimized for cooperation with diesel power units, which translates into appropriately selected gear ratios, shifting characteristics, and efficient use of available torque. The gearbox is adapted for integration with the vehicle's factory electronic control system, which facilitates diagnostics and configuration at a service center.

Benefits of using an automatic gearbox in the Mercedes ML W164 / R W251

Using this transmission in the powertrain provides a number of practical operational benefits:

• Driving comfort – automatic gear shifting eliminates the need for manual clutch and gear lever operation, which is particularly noticeable in city traffic.
• Stable performance with diesel engines – the gearbox has been designed to work with diesel units, which promotes smooth acceleration and optimal use of torque.
• Consistency with the vehicle's factory architecture – the transmission comes from the family of OEM solutions used in Mercedes ML W164 and R W251 models, which facilitates installation and integration with the existing system.
• Possibility to maintain the original gear shifting characteristics, in accordance with the vehicle manufacturer's specifications.

Condition, origin, and service application

The transmission is a used component, which makes it an attractive cost-effective solution for powertrain repairs in Mercedes ML W164 and R W251 vehicles. Such components are often chosen for:

• comprehensive repairs after the failure of an existing automatic gearbox,
• restoring the factory powertrain configuration after mechanical damage,
• servicing fleet vehicles where a reasonable cost-to-functionality ratio is important.

A used automatic gearbox allows for restoring vehicle performance while maintaining the manufacturer's original concept, without the need for using replacements with uncertain specifications.

OEM selection and vehicle compatibility

Due to the specifics of Mercedes automatic transmissions, precise matching of the gearbox to the specific engine and equipment version of the vehicle is crucial. It is recommended to compare the OEM number and interchangeable numbers with service documentation or the vehicle card, as well as to verify compatibility using the VIN. This approach minimizes the risk of problems with installation, communication with control units, and operation in limp mode.

To better understand the specifics of the secondary market and the principles of gearbox selection, it is worth reading our expert guide: Why it is worth buying used gearboxes and engines – facts instead of myths. The article discusses, among other things, selection procedures by VIN/OEM, common myths, and the proportions of repair costs versus replacement.

Support for Mercedes powertrain upgrades

If you are planning a comprehensive repair or upgrade of the powertrain area in your Mercedes and need other elements from the same group, such as other automatic transmissions, compatible torque converters, or additional control components, check the available parts in the Mercedes automatic gearboxes category.

Summary

Mercedes ML W164 R W251 Automatic Gearbox is a used, OEM automatic transmission designed for vehicles with diesel engines. It provides a functional service solution for users and workshops that want to restore proper powertrain operation, maintaining factory gear shifting characteristics and compatibility with Mercedes systems within a reasonable budget.