Mercedes W177 Automatic Gearbox Dual Clutch 700423 700.423 A7003702100 WARRANTY

Listing details

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

Mercedes W177 Automatic Gearbox Dual Clutch is a factory-original automatic transmission designed for Mercedes vehicles with petrol engines. This used component from the Automatic gearboxes category provides a solid foundation for professional drivetrain repair, ensuring structural compatibility with the manufacturer's factory specifications. It is an ideal solution for users seeking a technically matched gearbox while optimizing service costs.

Specifications and technical data

• SKU: A7003702700-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A7003702700
• Substitutable numbers: A7003702700, A 700 370 27 00, A7003702100, A 700 370 21 00
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Automatic Transmission

Purpose and technical characteristics

The presented gearbox belongs to the Automatic gearboxes group dedicated to Mercedes compact class models, including the W177 series with a petrol engine. The transmission design has been engineered to work seamlessly with the Mercedes drivetrain control system, which translates into consistent operation with vehicle electronics, safety systems, and factory driving modes.

The automatic transmission type ensures smooth gear shifting, reduces the risk of errors resulting from improper manual operation, and improves driving comfort in both urban traffic and on the highway. Using a gearbox dedicated to a petrol unit allows for maintaining the correct torque and engine speed characteristics, which is significant for both the dynamics and the durability of the entire drivetrain.

Benefits of using an original Mercedes automatic gearbox

Choosing a used, original automatic gearbox for a Mercedes W177 is a solution that combines technical requirements with a rational service budget. Key advantages of this approach include:

• maintaining the factory drivetrain concept and fitment for the specific vehicle platform,
• consistency with control software and driver assistance systems,
• the ability to utilize the existing mounting architecture without interfering with the body structure or drivetrain,
• cost reduction compared to purchasing a new transmission while maintaining vehicle compatibility.

Thanks to this, the gearbox can be used both in the event of a failure of the existing transmission and during a comprehensive drivetrain rebuild after a collision or a major mechanical fault.

Application in petrol vehicles and installation aspects

The gearbox is intended for use with Mercedes petrol engines, which means appropriately selected gear ratios and operating characteristics in terms of driving refinement and fuel consumption. In practice, this translates into predictable vehicle behavior, proper throttle response, and stable operation under various loads.

During installation, it is essential to follow the manufacturer's procedures, including proper system bleeding, using the correct automatic transmission fluid, and performing adaptation and calibration using an appropriate diagnostic tester. This minimizes the risk of improper transmission operation after replacement and ensures the correct functioning of all automatic gear shifting modes.

Selecting the right gearbox and part number compatibility

Due to the complexity of modern Mercedes automatic transmissions, selecting a gearbox that matches the vehicle's documentation is of key importance. In practice, this means verifying the OEM part number and available interchangeable numbers based on the manufacturer's catalog or specialized service software. This approach helps avoid mechanical and electronic compatibility issues.

Before purchasing, it is worth comparing the vehicle data (model, generation, engine type, year of production) with the information in the specification, as well as consulting the selection with a mechanic or technical advisor. This allows a used automatic gearbox to be effectively utilized as a component to restore full drivetrain functionality in a Mercedes car.

Technical support and additional materials

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

For users who want to better understand the differences between transmissions and make an informed decision when purchasing a used component, a guide describing typical faults and selection criteria will be helpful. A detailed discussion can be found in the article Gearbox: manual, automatic or DSG – typical faults and a guide to buying a used gearbox, where practical tips regarding the assessment of technical condition and operation of automatic transmissions are presented.