Mercedes H243 Bonnet Actuator Left Right N/O/S Pedestrian Protection A2479069901

Mercedes H243 Bonnet Actuator Left Right N/O/S Pedestrian Protection is a specialized component from the Electronic control modules and controllers group, responsible for the controlled, pyrotechnic release of the bonnet in selected Mercedes models. This solution supports advanced vehicle safety systems, ensuring precise operation under strictly defined working conditions.

Specifications and technical data

• SKU: A2479069901
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2479069901
• Substitutable numbers: A2479069901, A 247 906 99 01
• Location on the vehicle: Right, Left
• Category: ECUs & Computer Modules

Purpose and function of the bonnet actuator

The presented bonnet actuator with a pyrotechnic cartridge is a safety system component that works in conjunction with the body electronics and relevant control units. Its task is to perform a rapid, controlled action in situations specified by the manufacturer, while maintaining high repeatability and operational stability.

This component is adapted for installation on both the right and left side of the vehicle, which facilitates system configuration and servicing. Thanks to its integration with Mercedes electronic systems, the actuator works with control modules responsible for analyzing sensor signals and initiating the pyrotechnic charge.

Construction and integration with vehicle electronics

The bonnet actuator with a pyrotechnic cartridge belongs to a group of components that combine a mechanical part with a precisely controlled electronic part. In practice, this means:

• strictly defined electrical parameters required for proper cooperation with control modules,
• a design adapted for installation in factory-designated body points,
• a pyrotechnic charge activation sequence designed by the manufacturer.

As a result, the actuator maintains compatibility with the electronic architecture of Mercedes vehicles, and its operation is monitored by appropriate control units, which minimizes the risk of incorrect activation.

Vehicle placement and installation aspects

The possibility of application on the right and left side of the vehicle increases flexibility during post-accident or service repairs. When selecting and installing, it is important to maintain:

• compliance with the vehicle's factory electronic system,
• correct routing of the electrical harness to the actuator,
• proper mounting in the points designated by the manufacturer.

Due to the presence of a pyrotechnic charge, it is recommended that installation and removal be performed by a qualified service center, in compliance with safety procedures regarding electrically initiated components.

Characteristics as a used component

The offered bonnet actuator is a used component, sourced from dismantling, which allows for an economical repair of the safety system while maintaining the original manufacturer's specifications. Choosing an original second-hand component is often preferred over aftermarket replacements that lack full integration with the vehicle's electronics.

Before installation, it is recommended to verify compatibility with the specific car model, particularly in terms of cooperation with existing control modules and the safety system configuration.

Selection by numbers and technical support

Due to its connection with body electronics and control units, the selection of the correct bonnet actuator should be based on the vehicle's technical data and manufacturer markings. In practice, the following are most commonly used:

• OEM markings assigned to a specific vehicle configuration,
• reference numbers used in parts catalogs,
• vehicle identification data, such as VIN, to verify compatibility.

To better understand the specifics of selecting and operating used electronic components, it is worth reading the guide dedicated to modules and sensors – it discusses in detail the issues of compatibility, markings, and practical aspects of installation: Used automotive electronics – ECU modules and second-hand sensors.

System expansion within the same group

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