Mercedes ML W164 R W251 Transfer Case Box Transmission A2512802100 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 Transfer Case Box Transmission is a specialized drivetrain component designed for Mercedes ML-Class W164 and R-Class W251 models. Offered within the Transfer Cases category, this unit ensures proper torque distribution between the vehicle's axles, which translates into stable handling and predictable vehicle behavior. This used OEM component is a sensible choice for informed users looking for a proven solution at an attractive price.

Specifications and technical data

• SKU: A2512802100
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2512802100
• Substitutable numbers: A2512802100, A 251 280 21 00
• Category: Transfer Cases

Function and application in the drivetrain

The transfer case in Mercedes ML W164 and R W251 models is responsible for the precise transfer of drive from the main transmission to the individual axles, with gear ratios adapted to the weight and character of the vehicle. A correctly selected component allows for maintaining factory traction parameters, stability during acceleration, and predictable behavior on slippery surfaces.

Replacing a worn or damaged transfer case with an original dismantled unit is particularly important in all-wheel-drive vehicles, where even torque distribution has a direct impact on driving safety, the operation of assistance systems (ESP, ASR), and the durability of other drivetrain components.

Benefits of using an original Mercedes transfer case

By choosing this transfer case, you receive a component designed specifically for the ML W164 and R W251 platform, which means:

• factory fitment for mounts and suspension geometry,
• preservation of correct gear ratios and drive operating characteristics,
• compatibility with factory traction control systems,
• reduced risk of improper installation compared to universal aftermarket replacements.

By using an original component from the Transfer Cases category, you minimize the risk of software incompatibility, gear ratio differences, or electronic system calibration issues, which is particularly important in modern Mercedes designs.

Characteristics of the used component

The offered transfer case is a used part, sourced from dismantling, which allows for a significant reduction in repair costs compared to purchasing a new unit. With proper selection for the specific engine and drivetrain version of the vehicle, you can achieve a favorable price-to-durability ratio while maintaining the manufacturer's original specifications.

To maximize the potential of the used component, it is recommended to have it installed at a specialized service center that will verify the correctness of the installation, the tightness of connections, and the interaction with the existing drivetrain. This approach limits the risk of additional stress on drive shafts, half-shafts, and the main transmission.

Selection by OEM numbers and technical support

The transfer case in Mercedes ML W164 and R W251 models comes in several variants, depending on the drivetrain version and vehicle configuration. Therefore, before purchasing, it is worth verifying compatibility by the OEM number and interchangeable numbers to avoid problems with installation and drive operation. In case of doubt, it is helpful to compare the markings with the removed part or consult a mechanic.

If you want to better understand how to safely choose used drivetrain components, including transmissions and related parts, it is worth checking out our expert guide: Why it is worth buying used transmissions and engines – facts instead of myths. You will find practical tips on selection by OEM numbers, cost analysis, and answers to frequently asked questions.

Expanding repairs within Mercedes transfer cases

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 housings, shafts, or multi-plate clutches, check out the available parts in the Mercedes Transfer Cases category.