What is a Mercedes-Benz C-Class W202 airbag control unit?
The Mercedes-Benz C-Class W202 airbag control unit is the central safety unit in your vehicle, which activates all occupant restraint systems, such as airbags and seat belt pretensioners, in the event of an accident. It continuously monitors sensors, stores relevant crash data, and thus ensures the proper function and deployment of all airbag modules.
As a safety-critical component, it coordinates the Supplemental Restraint System (SRS) of your Mercedes-Benz C-Class W202.
It is integrated directly into the vehicle network to enable a fast and precise response in an emergency and to maximize the safety of the occupants.
Why is the Mercedes-Benz C-Class W202 airbag control unit defective?
A Mercedes-Benz C-Class W202 airbag control unit is often defective because immutable crash data is stored after an accident, causing the airbag warning light to constantly activate. Internal component defects or communication problems can also lead to failure, impairing the function of the entire airbag system.
If crash data is stored in the control unit, the unit is locked and the warning light is illuminated, which requires a professional Mercedes-Benz C-Class W202 airbag control unit repair.
Internal defects may manifest as impossible diagnostics or sporadic warning messages, indicating that the airbag system is "broken."
Software errors or lost coding are other reasons that require a comprehensive diagnosis and repair of the module.
Common error codes for Mercedes-Benz C-Class W202 airbag control unit repair
A Mercedes-Benz C-Class W202 airbag control unit repair is often necessary due to specific error codes that directly indicate a problem with the control unit itself. These codes rule out sensor or seatbelt pretensioner faults and indicate internal defects or stored crash data in the system.
- B2D92 → Control unit defective → Airbag ECU failure
- B1000 → Control unit communication error → Communication error to the airbag ECU
An error such as "crash data stored" is not always indicated by an OBD-II code, but is a common reason for the airbag warning light to stay on and the system to fail.
These specific B-codes are original Mercedes-Benz airbag ECU errors that require a specialized workshop or diagnostic software to repair the system.
What part numbers are available for the Mercedes-Benz C-Class W202 airbag control unit repair?
For Mercedes-Benz C-Class W202 airbag control unit repairs, specific, precisely verified OEM part numbers are relevant. These numbers exclusively refer to the airbag control unit and ensure its compatibility with your vehicle model. These numbers are the binding reference standard for original parts.
These are original manufacturer part numbers (OEM) from Mercedes-Benz that are validated for the C-Class W202.
The following numbers refer explicitly to the airbag control unit (ECU) and are not for sensors or other modules:
- 0018202126 (Mercedes-Benz original)
- 00060560C (Mercedes-Benz original)
- 0018200826(08) (Mercedes-Benz original)
- 0008208026 (Mercedes-Benz original)
These part numbers are crucial to ensuring that you receive or can identify the correct component to repair your faulty airbag control unit.