What is a Mercedes-Benz CL C216 airbag control unit?
The Mercedes-Benz CL C216 airbag control unit is the central safety unit that activates all occupant restraint systems, such as airbags and belt tensioners, in milliseconds in the event of an accident. It continuously monitors various sensors and stores relevant crash data, thus ensuring proper function and safety in the vehicle.
This electronic component is crucial for protecting vehicle occupants. It processes signals from crash sensors and precisely triggers the restraint systems.
The control unit communicates continuously with other vehicle systems via the CAN bus. It is responsible for the reliability of the passive safety system and is essential for the safety of your Mercedes-Benz.
Why is the Mercedes-Benz CL C216 airbag control unit defective?
The Mercedes-Benz CL C216 airbag control unit may be defective because it stores crash data after an accident, preventing it from being reinitialized, or because internal electronic components fail due to age. A poor power supply, corrosion at connectors, or software errors can also cause a malfunction and necessitate a Mercedes-Benz CL C216 airbag control unit repair.
A common cause is the storage of crash data after an accident, which blocks the system. This often requires a professional reset of the control unit.
Electronic components can fail due to aging or overload. Internal error codes then indicate a defect in the device itself.
Problems with the power supply or corrosion on the connectors also lead to failures. This impairs communication between the control unit and the vehicle electrical system.
Common error codes for Mercedes-Benz CL C216 airbag control unit repair
During Mercedes-Benz CL C216 airbag control unit repairs, specific error codes may occur that indicate internal problems or communication issues within the control unit. These codes are crucial for a precise diagnosis, as they directly affect the functionality of the module and require a detailed inspection.
- B1000 → Control unit communication error → Communication between diagnostic device and airbag control unit disrupted.
- B1010-001 → On-board power supply/terminal 15 error → Problems with the power supply to the control unit.
- B1864-004 → Internal control unit error → Defect within the airbag control unit itself.
- B1871-004 → Squib control unit/cable error → Problem in the wiring or control of the squib.
- B1875-007 → TeleAid control unit error → Communication problem with the TeleAid system.
These error codes are read using special Mercedes diagnostic devices. They help pinpoint the exact cause of the malfunction.
After an accident, no direct error codes are stored, but rather crash data. This data must be professionally erased before the vehicle can be restarted.
What part numbers are available for the Mercedes-Benz CL C216 airbag control unit repair?
Several exact OEM part numbers are relevant for the Mercedes-Benz CL C216 airbag control unit repair: A2218704887 and A2168800118 as Mercedes-Benz genuine parts, as well as 0285001996 as the corresponding Bosch genuine replacement part number. These numbers guarantee compatibility with your vehicle model and year of manufacture.
Part number A2218704887 is a primary Mercedes-Benz original part number. It is often found on models such as the CL 500 from 2006 to 2013.
Bosch supplies the exact replacement part under the number 0285001996. This is technically identical to the original Mercedes-Benz part.
Another verified Mercedes-Benz OEM number is A2168800118. This is also used for SRS control units in the C216.
It is crucial to accurately check the part number before repairing a Mercedes-Benz CL C216 airbag control unit. This ensures that the correct control unit is ordered or repaired.
Technical specifications and functionality of the Mercedes-Benz CL C216 airbag control unit
The Mercedes-Benz CL C216 airbag control unit is a high-precision module that controls the entire occupant protection function, processes signals from crash sensors, and deploys airbags and seatbelt pretensioners in milliseconds in an emergency. It stores important crash data and continuously monitors all safety-relevant components for maximum occupant safety.
The control unit receives signals from sensors around the vehicle. It precisely detects impact intensity and direction.
Based on seat occupancy, the device decides which airbags should be deployed optimally. This prevents unnecessary activations.
After an accident, specific crash data is stored in the control unit. This data is essential for professional accident analysis.
An illuminated airbag/SRS warning light in the instrument cluster indicates a malfunction, requiring immediate diagnosis.
Repairing the Mercedes-Benz CL C216 airbag control unit often involves deleting this stored crash data. This restores the module to a working condition.
Installation position and compatibility of the Mercedes-Benz CL C216 airbag control unit
The Mercedes-Benz CL C216 airbag control unit is typically mounted under the driver or passenger seat, protected from mechanical influences and easily accessible for maintenance. It is specifically designed for the CL-Class Coupé series C216 (2006-2014) and is compatible with all engines of this period.
Positioning the sensitive component under the seats effectively protects it. It is connected via vehicle-specific connectors.
The control unit communicates with other vehicle systems via the CAN bus. This ensures seamless coordination of safety functions.
Compatibility extends across various model variants, such as the CL 500 and CL 63 AMG. It is a key component for all C216 safety standards.
Professional installation and, if necessary, calibration are essential for proper function. The use of simulators is strongly discouraged to avoid compromising safety.