Mercedes ML W164 W204 W211 CLS C219 Acceleration Sensor Module Unit A0045423518

Mercedes ML W164 W204 W211 CLS C219 Acceleration Sensor Module Unit is a component from the Electronic control modules and controllers group, responsible for precise measurement of acceleration and transmitting signals to the vehicle's safety systems. It enables the correct response of protective systems in selected Mercedes models, ensuring stable operation of the body electronics. This solution is intended for users who expect a proven component with factory-standard performance characteristics.

Specifications and technical data

• SKU: A0045423518
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0045423518
• Substitutable numbers: A0045423518, A 004 542 35 18
• Category: ECUs & Computer Modules

Purpose and function of the acceleration sensor

The presented sensor is an electronic component installed in selected Mercedes ML, C, E, and CLS class models, where it is responsible for monitoring body acceleration and G-forces. Based on its signal, the vehicle's controllers can react appropriately in critical situations, which is essential for the operation of passive and active safety systems.

As a part from the Electronic control modules and controllers group, the sensor works with other modules in the vehicle network, transmitting data digitally. This maintains communication consistency within the electrical system, and computer diagnostics can clearly indicate its operating status.

Benefits of using an original Mercedes sensor

Using an original acceleration sensor in a Mercedes allows for maintaining operating parameters consistent with the manufacturer's factory specifications. Key advantages include:

• consistent cooperation with existing controllers and the vehicle's electrical system,
• appropriate acceleration measurement characteristics tailored to the specific model platform,
• possibility of correct diagnostics using factory service tools,
• preservation of predictable safety system operation.

For workshops and users, this means easier part selection by OEM number, lower risk of compatibility issues, and stable operation of electronic systems after installation.

Product characteristics and condition

The offered sensor belongs to the group of used components, which in practice means an attractive cost-to-functionality ratio while maintaining the factory design. Such electronic elements, when used correctly, retain their measurement properties for a long time, which is why they are frequently chosen as a service solution.

The acceleration sensor is structurally prepared for installation in dedicated points on the body or subframe, in accordance with the solutions applied by the manufacturer. After proper mounting and connection to the electrical harness, it is possible to perform diagnostics and potential adaptation in the controller, if the specific model requires it.

Selection, installation, and compatibility

To ensure proper operation, the selection of the sensor should be based on vehicle data and part identification numbers. In workshop practice, both service documentation and reading parameters from the diagnostic system are used for this purpose. This allows for verifying hardware and software compatibility with a specific car.

During installation, it is important to:

• use the correct mounting point provided by the manufacturer,
• maintain the correct orientation of the sensor relative to the vehicle's axes,
• securely connect the electrical connector without straining the harness,
• after installation – check for errors in the controller and clear any stored fault codes if necessary.

Such an approach minimizes the risk of repeated service interventions and allows for maintaining stable operation of electronic systems in the car.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the body electronics area in your Mercedes and need other elements from the same group, such as controllers, measurement modules, or additional sensors, check the available parts in the Mercedes electronic control modules and controllers category.

For users who want to better understand the specifics of the automotive electronics aftermarket, a practical Global Parts guide has been prepared. It discusses, among other things, selection by OEM numbers, hardware and software compatibility issues, and typical installation procedures – details can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.