Airbag control unit with part number A2469007602

What does the airbag control unit A2469007602 do?

The airbag control unit A2469007602 is the central control unit of the restraint system (SRS) for Mercedes-Benz. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds whether airbags and seatbelt pretensioners are triggered.

The manufacturer number Bosch 0285011103 is also printed on the housing.

In operation the unit monitors the system and reports faults via the airbag warning light. After an accident it stores crash data and locks itself.

Why does the control unit A2469007602 fail?

The most common cause is crash data stored after an accident, even if no airbag was deployed. A usual diagnostic tool cannot clear it. Ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

The crash data remains in the memory even if no airbag has deployed, and a normal diagnostic tool cannot remove it.

The other causes relate to the electronics and the connections in the vehicle. Components age, solder joints can go cold, and moisture or corrosion attack plug connections.

Voltage spikes, for example from a weak battery or a jump start, can also lead to a failure.

How can you tell that the A2469007602 is defective?

A defect shows up as the airbag warning light, which lights up permanently or intermittently, as an error message in the instrument cluster, as the diagnostic tool being unable to find the unit, or as a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may fail to deploy in an emergency.

• Airbag warning light in the instrument cluster lights up
• Error message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

The light reproduces the fault as soon as the control unit detects it. If it lights up permanently, have the vehicle checked promptly.

Which vehicles is the A2469007602 fitted in?

The control unit A2469007602 is fitted in these vehicles: Mercedes-Benz B-Class W246 (2011-2018).

The following vehicles are known for this part number:

• Mercedes-Benz B-Class W246 (2011-2018)

Comparing the part number on the label of the removed unit with this page only confirms that it is the right unit. Having the fault memory read out shows, by contrast, whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers A 246 900 07 09, A246 900 75 02, A2469006018.

How does the repair of the A2469007602 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only after that remove the control unit. Online, you create the repair order; then pack the unit well and send it in.

Airbag24 checks the unit on the test bench, replaces defective components and deletes the stored crash data. The process ends with a function test, after which your own unit goes back to you. Processing there usually takes 3–4 working days.

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 A2469007602 get to Airbag24?

You send the control unit as a parcel, or you have it collected by UPS for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

The printed repair order goes in the parcel, and the control unit is packed shock-proof.