What is a Mercedes-Benz CLA C117 airbag control unit?
The Mercedes-Benz CLA C117 airbag control unit is the central safety unit in the passive occupant protection system, which activates all restraint systems in the event of an accident. It continuously monitors sensors, stores relevant crash data, and ensures the proper function and deployment of all airbag modules and belt tensioners in the vehicle.
This electronic module is crucial for your safety and reacts instantly to collision signals. It is typically installed in the center console and connected to the sensors via wiring harnesses.
Proper functioning of the airbag control unit is essential for the operational safety of your Mercedes-Benz CLA C117. If a fault occurs, the airbag warning light will illuminate continuously.
Why is the Mercedes-Benz CLA C117 airbag control unit defective?
The Mercedes-Benz CLA C117 airbag control unit often fails because it stores crash data after an accident, preventing it from being used again. Internal electronic errors or a malfunction due to aging or voltage spikes can also lead to a defect that renders the airbag systems unusable.
A common cause of the defect is the deployment of the airbags in an accident. Crash data is permanently stored in the control unit.
This storage prevents reuse of the module without a professional Mercedes-Benz CLA C117 airbag control unit repair. Internal component failures or software errors may also be present.
Signs of a defect include a persistent airbag warning light or the inability to clear error codes. The control unit often no longer communicates correctly with other vehicle systems.
Common error codes for Mercedes-Benz CLA C117 airbag control unit repair
The most common error code indicating a defect in the Mercedes-Benz CLA C117 airbag control unit is B220700, which indicates an internal error in the Supplemental Restraint System. This code signals that the control unit itself is defective or has jammed after an accident.
- B220700 → Internal error in the “Supplemental Restraint System” control unit → Control unit is defective or blocked by crash data.
- B1000 → Control unit communication error → The airbag control unit can no longer communicate with other vehicle components.
- B2000ff / B2001ff (generic) → Internal malfunction of the control unit → Various internal problems in the airbag module itself that require a Mercedes-Benz CLA C117 airbag control unit repair.
What part numbers are available for the Mercedes-Benz CLA C117 airbag control unit repair?
There are various original part numbers for the Mercedes-Benz CLA C117 airbag control unit repair, which may vary depending on the year of manufacture and trim level of your vehicle. These numbers identify the specific airbag control unit installed in your CLA C117.
Some of the 100% verified OEM part numbers for the Mercedes-Benz CLA C117 airbag control unit are A1179001802 and 0285013862 (Bosch).
Other relevant original part numbers include A1179017201, A1179021102 and A1179009200.
The numbers A1179011700, A1179005800 and the Bosch number 0 285 011 863 are also relevant for this component.
These part numbers are crucial to finding and identifying the correct module for the Mercedes-Benz CLA C117 airbag control unit repair.