Airbag control unit with part number A2139019613

What does the airbag control unit A2139019613 do?

In the Mercedes-Benz, the airbag control unit A2139019613 is the component that controls the restraint systems. It records the deceleration of an accident via the crash sensors, decides on the use of airbags and seatbelt pretensioners, and monitors the system continuously. If it detects a fault, the airbag warning light comes on.

The evaluation is based on the sensor readings and takes place in a fraction of a second.

After an accident the unit stores crash data and locks itself.

Why does the control unit A2139019613 fail?

The most common cause is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot erase it. Further causes are aged components, moisture at plug connections and voltage spikes.

The further causes at a glance:

• aged electronic components
• cold solder joints on the circuit board
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or jump-starting

Crash data remains in the memory until it is erased during the repair. The causes listed can also occur without an accident.

How can you tell that the A2139019613 is defective?

In the instrument cluster, the airbag warning light shows the fault, sometimes permanently, sometimes only intermittently. An error message in the instrument cluster and no communication with the diagnostic tool are also conspicuous. In that case airbags and seatbelt pretensioners may not trigger in an emergency.

When the ignition is switched on, the warning light briefly lights up and must then go out. If it stays on, there is a finding that needs checking.

Which vehicles is the A2139019613 fitted in?

The airbag control unit A2139019613 is fitted in these vehicles: Mercedes-Benz E-Class S213 Estate (2016-2023) and W213 Saloon (2016-2023). Whether your vehicle is among them can be clarified in advance. The part number alone is not sufficient for this.

These vehicles are included:

• Mercedes-Benz E-Class S213 Estate (2016-2023)
• Mercedes-Benz E-Class W213 Saloon (2016-2023)

Comparing the part number on the label of the removed unit with this page only ensures that you have the correct unit. Additionally, have the fault memory read out. Only the log shows whether the control unit itself is affected or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers A213 900 46 25, A213 900 88 22, A213 900 88 28, A2139007105, A2139010104.

How does the repair of the A2139019613 work?

Have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit. Create a repair order online and send in the well-packed unit. The work at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit, repairs defective components, erases stored crash data and carries out a function test. The unit then goes back to you.

Our repairs come with 2 years' statutory liability for defects. The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit A2139019613 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

Put the printed repair order in the parcel and pack the control unit shock-proof.