Mercedes-Benz GLC X253 airbag control unit repair

What is a Mercedes-Benz GLC X253 airbag control unit?

The Mercedes-Benz GLC X253 airbag control unit is the central safety unit in the vehicle, precisely activating all occupant restraint systems, such as airbags and belt tensioners, in the event of an accident. It monitors sensors, stores crash data, and ensures the continuous functionality of passive safety systems for optimal occupant protection.

This essential component is an integral part of the Supplemental Restraint System (SRS) and coordinates the vehicle's response in collisions.

Its primary task is to trigger the correct protective measures at the right time based on the sensor data received. A functioning airbag control unit is therefore essential for the safety of all vehicle occupants.

Why is the Mercedes-Benz GLC X253 airbag control unit defective?

A Mercedes-Benz GLC X253 airbag control unit often malfunctions because it stores crash data after an accident, thus becoming blocked. Common causes include internal memory errors, power supply issues, or communication problems that activate the airbag light. A professional Mercedes-Benz GLC X253 airbag control unit repair is then required to restore safety.

Often, the control module is automatically locked after an accident to prevent accidental deployment. This causes the airbag warning light to remain permanently illuminated and another system function to be disabled. The module then needs to be reset or repaired.

Another common cause of failure is internal errors in the memory chip or the electronics of the control unit itself. Such defects can occur even without an accident and require professional diagnosis and repair to restore the safety system to full functionality. Diagnosis will then reveal whether the airbag control unit is truly defective.

Common error codes for Mercedes-Benz GLC X253 airbag control unit repair

There are no exclusive, publicly verified error codes for the Mercedes-Benz GLC X253 airbag control unit repair specifically for part numbers A2139004625 and A2218200226. However, diagnostic tools generally indicate Mercedes-Benz B-codes in the event of defects, which describe internal system problems or communication errors in the control unit.

• B1000: This code indicates a communication error in the control unit, often caused by an open data line or an internal error in the airbag ECU.
• B1584: It signals an internal error in the control unit, which indicates a malfunction of the internal electronics or memory in the airbag ECU and requires repair.
• B1622: This code indicates a faulty voltage supply to the control unit, often caused by insufficient power to the airbag ECU or a defect in the electrical circuit.
• B1631: This indicates a memory error in the control unit, which indicates data corruption or a defect in the non-volatile memory in the airbag ECU and requires repair.
• B1690: This code indicates a failed internal control unit check, which means that the airbag ECU could not successfully complete its self-test, often due to a hardware failure.

What part numbers are available for the Mercedes-Benz GLC X253 airbag control unit repair?

For the Mercedes-Benz GLC X253 airbag control unit repair, the two verified Mercedes-Benz OEM part numbers A2139004625 and A2218200226 are relevant. These are confirmed in parts catalogs as compatible with the GLC X253 SUV (2015-2019) and allow precise identification for repair or replacement.

The part number A2139004625 is listed in vehicle-specific repair and spare parts databases as the original airbag control unit for the Mercedes-Benz GLC X253.

It is specifically listed for the airbag control unit and can be found in professional repair sources. This number is crucial for the correct performance of a Mercedes-Benz GLC X253 airbag control unit repair.

An alternative original OEM part number is A2218200226, which also appears in Mercedes-Benz OEM parts catalogs for relevant model series, including the GLC X253. Both part numbers are relevant for precisely identifying the required control unit or for performing a repair.