Airbag control unit with part number A2308209326

What does the airbag control unit A2308209326 do?

The airbag control unit A2308209326 controls the restraint system (SRS) for Mercedes-Benz. It checks the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system continuously. After an accident it stores crash data and locks itself.

The housing also carries the manufacturer number Bosch 0285010421. The unit shows faults via the airbag warning light in the instrument cluster.

Why does the control unit A2308209326 fail?

With the A2308209326, crash data stored after an accident is the most common cause, even if no airbag has deployed. With this control unit, deleting the crash data is often not possible; if you wish, get in touch with Airbag24 briefly before sending it in. Other causes are ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

The crash data remains in the unit even if no airbag was triggered in the accident.

• Ageing components whose reliability decreases over time.
• Cold solder joints on the circuit board.
• Moisture and corrosion at plug connections.
• Voltage spikes, for example from a weak battery or from jump-starting.

How can you tell that the A2308209326 is defective?

If there is a defect in the A2308209326, the airbag warning light in the instrument cluster indicates it by staying on permanently or intermittently. In addition, an error message appears, the diagnostic tool cannot find the control unit, or the fault memory cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

A warning of this kind should be checked by a specialist promptly, even if the vehicle appears to run normally in everyday use.

The indication does not explain itself, which is why reading out the fault memory with a diagnostic tool is the next step.

Which vehicles is the A2308209326 fitted in?

The airbag control unit A2308209326 is fitted in these vehicles: Mercedes-Benz SL-Class R230 Convertible (2001-2011).

The allocation in detail:

• Mercedes-Benz SL-Class R230 Convertible (2001-2011)

Comparing the number on the label of the removed unit with this page confirms that the correct unit is at hand. Whether the control unit has a defect or a connector or cable is causing the fault is only shown by the fault memory once it has been read out. It therefore belongs before removal.

For the same vehicles, we also repair control units with the part numbers 285001358, 285010163, A 230 820 40 26, A0018207326, A2308205626, A2308206626.

How does the repair of the A2308209326 work?

First have the fault memory of the A2308209326 read out and enclose the log, then disconnect the battery and remove the control unit. Then create the repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components and carries out a functional test. If you wish to have the crash data deleted, get in touch with Airbag24 briefly before sending the unit in. Your own unit is then returned 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 A2308209326 get to Airbag24?

You can send in the control unit A2308209326 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS. Pack the unit shock-proof and enclose the printed repair order in the parcel.

A sturdy carton and the enclosed repair order keep the shipment clearly assigned to your case.