Mercedes W205 W212 OM651 Automatic Gearbox 724208 724.208 2122706805 WARRANTY

Listing details

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

Mercedes W205 W212 OM651 Automatic Gearbox 724208 724.208 2122706805 WARRANTY is a factory-original automatic transmission from the Automatic gearboxes category, designed for use in Mercedes vehicles equipped with the OM651 engine. This is a solution for users who expect precise drivetrain performance, the preservation of original gear-shifting characteristics, and high compatibility with the vehicle's factory electronics.

Specifications and technical data

• SKU: A2122706805
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2122706805
• Substitutable numbers: A2122706805, A 212 270 68 05
• Gearbox type: Automatic
• Part type: Automatic Transmission
• Category: Automatic Transmission

Technical characteristics and intended use

The presented transmission belongs to the Automatic gearboxes category and has been designed to work with the OM651 engine in Mercedes C-Class (W205) and E-Class (W212) models. The automatic design ensures smooth gear changes, stable torque transfer, and comfortable operation under typical road conditions, both in city traffic and on the highway.

An automatic transmission of this type is integrated with the vehicle's control system, which allows for precise adjustment of gear-shifting strategies to the engine's characteristics, driving modes, and driver assistance systems. This ensures the consistency of the entire drivetrain's operation, while throttle response remains predictable and repeatable.

Application in Mercedes vehicles with the OM651 engine

The transmission has been developed for installation in Mercedes vehicles from the W205 and W212 families equipped with the OM651 unit, which in practice means:

• preservation of factory mounting points and drivetrain geometry,
• compatibility with original electrical harnesses and control units,
• integration capability with factory driving modes and safety systems.

Such a fit reduces the need for mechanical and electrical modifications during installation, which translates into shorter service time and a lower risk of operational issues after replacement.

Benefits of using an automatic transmission

Using an automatic transmission in Mercedes vehicles with the OM651 engine provides a number of practical advantages, important for both drivers and service centers:

• driving comfort thanks to smooth, predictable gear changes without the need for clutch operation,
• stable power and torque transfer, beneficial for daily use and longer trips,
• better matching of engine performance to load and road conditions thanks to electronic control,
• the ability to utilize factory gear-shifting strategies designed specifically for the OM651 unit.

For the user, this means more predictable vehicle behavior, reduced jerking during gear changes, and convenience in heavy city traffic.

Condition, verification, and installation aspects

The offered transmission comes from the segment of used Mercedes components, which allows for an economical replacement while maintaining the original design. Before installation, a standard service procedure is recommended, including checking for leaks, verifying connectors, and matching it to the specific vehicle configuration in accordance with the manufacturer's guidelines.

Due to the nature of automatic transmissions, it is recommended to perform adaptation and basic diagnostic procedures after installation so that the engine and transmission control units correctly synchronize with the new component. This allows for stable drivetrain operation and reduces the risk of errors in electronic systems.

Technical support and additional materials

For users who want to better understand the differences between various types of transmissions and approach the purchase of a used component consciously, the following guide will be useful: Transmission: manual, automatic or DSG – common faults and a guide to buying a used gearbox. The article discusses the characteristics of automatic transmissions, typical signs of wear, and practical tips regarding the selection and verification of used parts.

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 transmissions, control components, or related mounting parts, check the available parts in the Mercedes automatic gearboxes category.