What is a Mercedes-Benz CLA C118 airbag control unit?
The Mercedes-Benz CLA C118 airbag control unit is the central control unit for your vehicle's passive safety system. It detects accidents, precisely deploys airbags and seatbelt pretensioners, and stores important crash data. This module is fundamental to your safety and requires professional repair if it malfunctions.
It continuously monitors signals from crash sensors and is crucial for coordinating all restraint systems. Any malfunctions in this system are immediately indicated by the airbag warning light. A professional Mercedes-Benz CLA C118 airbag control unit repair can restore safety.
Why is the Mercedes-Benz CLA C118 airbag control unit defective?
The Mercedes-Benz CLA C118 airbag control unit often malfunctions because it stores event-specific crash data after an accident and then locks up. Internal electronic errors or voltage surges can also cause failure. A professional Mercedes-Benz CLA C118 airbag control unit repair is essential in such cases.
After activation, the module permanently stores the crash data, which locks it for further operation and keeps the airbag warning light active. Deleting the crash data is only possible with special diagnostic software. A faulty control unit can also be caused by water ingress or a faulty power supply.
Such defects lead to internal circuit failures that affect the entire functionality of the airbag system. Precise diagnostics are required to determine and correct the exact cause of the failure.
Common error codes for Mercedes-Benz CLA C118 airbag control unit repair
Typical error codes for the Mercedes-Benz CLA C118 airbag control unit indicate internal module defects or communication problems within the vehicle's network. These codes are crucial for accurately diagnosing the airbag system and essential for determining the correct type of Mercedes-Benz CLA C118 airbag control unit repair.
- B220700: Internal error in the "Supplemental Restraint System" control unit → This code signals a hardware or software defect directly in the airbag control unit itself.
- B2D97: Airbag control unit N2/7 is defective → Directly indicates a general defect or functional failure of the airbag control unit.
- B2735: PASS-Key Programming Mode Active → This code indicates a status of the airbag control module related to the immobilizer system that requires a reset.
- C1020: CAN communication error → Indicates a general fault in the data transmission on the CAN bus, affecting the airbag control unit.
- C1021: CAN communication with EA/CC/ISC control unit interrupted → Specific communication error with other safety-relevant control units, relevant for the airbag control unit repair.
- C1024: CAN communication with engine control unit interrupted → Error in the communication between the airbag and engine control unit, which can lead to system malfunctions.
- C1025: CAN communication BAS with ESP control unit faulty → Indication of communication problems between the airbag module and the brake assist or ESP system.
What part numbers are available for the Mercedes-Benz CLA C118 airbag control unit repair?
For a successful Mercedes-Benz CLA C118 airbag control unit repair, the exact OEM part numbers are crucial for compatibility and function. These numbers identify the specific airbag control unit for your Mercedes-Benz CLA C118 model and ensure that the repair can be performed correctly.
Compatibility is ensured by these numbers and the vehicle's chassis number. When performing repairs, ensure the correct part number assignment to ensure a smooth replacement or reset.
Here are some verified OEM and supplier part numbers for the Mercedes-Benz CLA C118 airbag control unit:
- A1779024119 (Mercedes-Benz) and 0285020211 (Bosch): Common OEM numbers that have been confirmed multiple times for the airbag control unit in the CLA C118.
- A1779006604 (Mercedes-Benz): Also used for CLA C118, A-Class W177 and B-Class W247 and is a common variant.
- A1179005800 (Mercedes-Benz) and 0 285 011 863 (Bosch): These are specifically relevant for the repair of the CLA-Class airbag control unit.
- A2479005709, A2479012202, A1779027911, A1779044100, A1779028211 (all Mercedes-Benz): Other official Mercedes-Benz part numbers that also fit the CLA C118.
These numbers are exclusively for airbag control units and have been verified multiple times to guarantee correct assignment for your Mercedes-Benz CLA C118 airbag control unit repair.