What is a Mercedes-Benz E-Class S124 Estate airbag control unit?
The Mercedes-Benz E-Class S124 Estate airbag control unit is the central safety unit that precisely activates all occupant restraint systems, such as airbags and belt pretensioners, in the event of an accident. It continuously monitors all sensors, stores important crash data, and ensures the proper functioning of the entire airbag system—a crucial component of your vehicle's safety.
This electronic module is responsible for detecting collision situations and the coordinated deployment of the restraint systems to protect the vehicle's occupants. Proper functioning is essential to ensure safety in an emergency and to keep the SRS warning light in the instrument cluster off.
Why is the Mercedes-Benz E-Class S124 Estate airbag control unit defective?
The Mercedes-Benz E-Class S124 Estate airbag control unit often fails due to internal electronic components deteriorating due to aging, moisture, or overvoltage, which can lead to internal errors or communication problems. A single accident saves crash data and also requires professional repair or a reset to restore full functionality.
Common causes include corrosion of the connectors, component fatigue due to temperature fluctuations, or software errors. This often manifests itself as a permanently illuminated airbag warning light in the instrument cluster and requires a Mercedes-Benz E-Class S124 Estate airbag control unit repair.
In such cases, a professional repair is often a more cost-effective and sustainable solution than a complete replacement. This ensures that all safety-relevant functions function properly again.
Common error codes for Mercedes-Benz E-Class S124 Estate Airbag Control Unit Repair
Common error codes signal that a Mercedes-Benz E-Class S124 Estate airbag control unit repair is necessary, as they indicate internal defects or communication problems within the control unit itself. These specific B-codes, or manufacturer-specific codes, indicate that occupant safety is no longer fully guaranteed and that immediate specialist diagnosis is necessary.
- B1000: Control unit defective / communication error – Indicates a general fault in the airbag control unit or its communication, often a reason for a `Mercedes-Benz E-Class S124 Estate Airbag Control Unit Repair`.
- B1003: Control Unit Error – Indicates an internal problem within the airbag control unit.
- B119C: Control Unit Trouble Code (SRS Control Unit Error) – Specific error of the SRS control unit, often occurring after external influences.
- B1600: Airbag control unit fault (SRS lamp on) – Indicates a general fault in the airbag control unit, accompanied by an illuminated warning lamp.
- B2D92: Control unit defective (control unit N2/7 faulty) – Specific defect of the control unit N2/7, which is part of the airbag system.
- AE69: Internal error control unit lowline (N2/14 control unit) – Internal error in the N2/14 control unit that affects functionality.
- AD67: Control unit defective, voltage too high (error 9004) – Indicates an error caused by too high voltage on the control unit, which can damage the electronics.
What part numbers are available for the Mercedes-Benz E-Class S124 Estate airbag control unit repair?
The correct part numbers are crucial for a successful Mercedes-Benz E-Class S124 Estate airbag control unit repair or replacement, as they ensure exact compatibility with your vehicle. These verified OEM and supplier numbers will help you identify the correct control unit and restore your vehicle's safety.
Mercedes-Benz original part numbers and the corresponding Bosch OEM number are listed here to help you find the right replacement part. Always ensure an exact match when purchasing to avoid system failure.
- A0018201926: Mercedes-Benz – genuine part, suitable for E-Class W124 (incl. S124 station wagon).
- A2033504408: Mercedes-Benz – Genuine part, replaced by A0018201926.
- 0048201710: Mercedes-Benz – genuine part, commonly used by repair shops for W124.
- 0048201910: Mercedes-Benz – genuine part, often used in the context of S124 airbag control units.
- 0265101020: Bosch – OEM supplier number for Mercedes W124 airbag control units.