Mercedes-Benz Vito W447 airbag control unit repair

What is a Mercedes-Benz Vito W447 airbag control unit?

The Mercedes-Benz Vito W447 airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It precisely monitors sensors, stores relevant crash data, and ensures the proper functioning of all airbag modules in the vehicle to provide maximum safety.

This safety-relevant electronic module in the Mercedes-Benz Vito W447 (model year from 2014) is essential for the deployment of airbags and seat belt pretensioners. It is installed in various versions with part numbers such as A447 900 09 00 and A447 900 10 00.

The control unit is also found in related models such as the V-Class and Viano and stores vehicle-specific parameters. A professional repair of the Mercedes-Benz Vito W447 airbag control unit is often a cost-effective alternative to purchasing a new one.

Why is the Mercedes-Benz Vito W447 airbag control unit defective?

The Mercedes-Benz Vito W447 airbag control unit often fails because it irreversibly stores crash data after an accident or suffers from internal electronic errors. These problems then trigger the airbag warning light and require specialized repair or replacement of the module.

A common reason for failure is the storage of crash data after a collision, which can only be erased using professional equipment. If this isn't possible, the control unit is considered defective and must be repaired or replaced.

Internal errors in the control unit itself, often caused by aging components or voltage fluctuations, can also cause a failure. Such malfunctions require precise diagnosis and professional repair.

Common error codes for Mercedes-Benz Vito W447 airbag control unit repair

When repairing the Mercedes-Benz Vito W447 airbag control unit, specific error codes are crucial. They indicate internal problems or communication problems within the control unit. These codes, which can be read using diagnostic tools, require targeted correction to restore the functionality of the airbag system.

• B220700 → Internal control unit error → The airbag control unit has an internal problem that affects its functionality.
• B1000 → Communication error → There is a communication problem between the airbag control unit and other vehicle systems.
• B1003 → Control unit defective → A general defect in the airbag control unit has been detected, which requires immediate inspection.
• B119C → Internal Error (Control Unit) → The airbag control unit reports a specific internal error that requires repair.
• B1600 → Control unit error, SRS lamp on → A fault in the control unit causes the SRS warning lamp to illuminate continuously in the instrument cluster.

What part numbers are available for the Mercedes-Benz Vito W447 airbag control unit repair?

For the Mercedes-Benz Vito W447 airbag control unit repair, there are several specific OEM part numbers, all of which can be assigned to the original manufacturer, Mercedes-Benz. The main numbers such as A4479001000 and A4479000900, as well as other reference numbers, are crucial for correct part identification.

The primary and most frequently relevant OEM part numbers for repairs are A4479001000 and A4479000900. These are specifically verified for the airbag control unit of the Vito W447.

Additional OEM reference numbers such as A4479010300 and A4479020300 are also assigned to the Mercedes-Benz Vito W447 airbag control unit. They may indicate variants or revision-related modifications within the series.

It's important to check these exact numbers when purchasing or requesting a repair to ensure compatibility. An incorrect part number can lead to incompatibilities and further problems.