What is a Mercedes-Benz CLS X218 Shooting Brake airbag control unit?
The Mercedes-Benz CLS X218 Shooting Brake airbag control unit is the central safety unit that activates all occupant restraint systems in the event of an accident. It monitors sensors, stores crash data, and ensures the proper functioning of all airbag modules in the vehicle to provide maximum protection.
This essential component (SRS ECU) is vital for the passive safety of the vehicle, especially those built between 2012 and 2017.
It continuously processes signals from impact sensors and communicates seamlessly with other important systems such as ABS and ESP via the CAN bus.
Why is the Mercedes-Benz CLS X218 Shooting Brake airbag control unit defective?
The Mercedes-Benz CLS X218 Shooting Brake airbag control unit often fails because it stores crash data after an accident that needs to be erased, or because of internal malfunctions caused by aging and voltage spikes. Failure can also be caused by communication problems in the CAN bus or physical damage, which requires immediate repair.
Common reasons for a defect are stored crash data after an impact, which triggers an error message.
This stored data often prevents the system from functioning normally and requires a professional reset at a qualified workshop.
Internal components can also fail, manifesting as sporadic or persistent error codes and requiring immediate diagnosis.
Common error codes for Mercedes-Benz CLS X218 Shooting Brake airbag control unit repair
When repairing the Mercedes-Benz CLS X218 Shooting Brake airbag control unit, certain error codes indicate ECU problems, not sensor-related ones. These codes are crucial for a precise diagnosis, as they signal communication problems, internal defects, or system failures within the control unit, thus emphasizing the need for a professional workshop.
- B1000 → Control unit communication error → Error connecting the diagnostic tool to the airbag ECU.
- 93F9 → Internal error in the airbag control unit → Software or hardware defect within the ECU itself.
- 65535 → Control unit defective / No communication → Failure of the airbag ECU memory or complete system shutdown.
- C120501 → Communication with central gateway faulty → Problems with data transmission via the CAN bus to the airbag control unit.
- C130A00 → Ignorable error code (system note) → A Mercedes-specific code that is taken into account in the diagnostic process despite being "ignorable".
What part numbers are available for the Mercedes-Benz CLS X218 Shooting Brake airbag control unit repair?
Several verified OEM part numbers are relevant for the Mercedes-Benz CLS X218 Shooting Brake airbag control unit repair, ensuring exact fit and function. Knowing these specific numbers is crucial for finding the correct replacement part and completing a successful repair, both for original parts and aftermarket OEM versions.
- A 218 901 52 00 (Mercedes-Benz original)
- A 211 870 58 85 (Mercedes-Benz original, also compatible with C219)
- A 211 820 57 85 (Mercedes-Benz original)
- 211 870 26 26 / A2118702626 (Mercedes-Benz original)
- Bosch OEM No. 0048202410 (supplier OEM spare part)