Mercedes W177 Automatic Transmission K7B300 Selector Actuator 2517267700

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W177 Automatic Transmission K7B300 Selector Actuator is a precision component from the Transmission sensors group, responsible for the correct positioning and control of the gearbox operation. Using an original component of this class allows for a technically sound repair of the drivetrain, maintaining the factory operating parameters of the transmission. This is a solution for users who expect stable automatic transmission performance and consistency with Mercedes factory electronics.

Specifications and technical data

• SKU: 2517267700-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: 2517267700
• Gearbox type: Automatic
• Category: Transmission Sensors

Function and role of the actuator in an automatic transmission

The automatic transmission actuator in the Mercedes W177 model is responsible for transmitting information about the current selector position to the controller and for the proper engagement of individual transmission operating ranges. A correctly functioning component from this group:

• stabilizes the gear shifting process in automatic mode,
• supports smooth starting and downshifting,
• reduces the risk of errors related to incorrect recognition of the lever position,
• contributes to the proper cooperation of the transmission with safety and driving comfort systems.

By maintaining the factory operating characteristics, the automatic transmission actuator helps restore predictable vehicle behavior in various road conditions.

Compatibility with the Mercedes W177 drivetrain

The presented component has been designed to work with the Automatic transmission type used in the Mercedes W177 class. This means that the design, connectors, and method of communication with the vehicle's electronics are adapted to the architecture of this model. In practice, this translates into:

• consistency with the factory transmission controller,
• correct interpretation of signals from position sensors,
• preservation of original gear shifting strategies.

Before installation, it is worth verifying the compatibility of the part with the specific vehicle equipment version to ensure full system functionality.

Characteristics of the used component

The offered actuator comes from the Used parts group, which allows for economical repair while maintaining the original Mercedes design. A used element of this type is particularly attractive in situations where:

• a quick replacement of a damaged transmission sensor is necessary,
• compatibility with factory equipment and the electrical harness is important,
• cost control is important while maintaining correct operating parameters.

During installation, it is recommended to perform adaptation and system diagnostics so that the transmission controller correctly recognizes the new component in the installation.

Benefits of using an original transmission sensor

Using an original actuator in the Mercedes W177 allows you to limit typical problems associated with improper automatic transmission operation, such as jerking, delayed reaction to range selection, or sporadic entry into emergency mode. Key advantages include:

• preservation of factory control logic – no need to modify the installation or software,
• better cooperation with other Transmission sensors in the vehicle,
• possibility of precise computer diagnostics based on standard service procedures.

For workshops and individual users, this means a predictable installation process and easier verification of correct operation after replacement.

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 position sensors, control modules, or additional measuring elements, check the available parts in the Mercedes transmission sensors category.

Technical support and knowledge about automatic transmissions

When selecting and installing elements from the group of sensors and automatic transmission actuators, it is worth relying on proven service procedures. A detailed discussion of typical faults, differences between transmission types, and practical tips on purchasing used components can be found in the article Transmission: manual, automatic or DSG – typical faults and a guide to buying a used transmission. This is a useful source of knowledge for both mechanics and informed users planning a drivetrain repair.