Airbag control unit with part number A0285010034

What does the airbag control unit A0285010034 do?

A0285010034 is the airbag control unit that controls the SRS system in Mercedes-Benz vehicles. From the signals of the crash sensors it calculates within milliseconds which airbags and seatbelt pretensioners are triggered in an accident.

The unit monitors the system continuously in the background. Any fault detected is indicated by the airbag warning light in the instrument cluster.

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

Why does the control unit A0285010034 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Further causes, which make themselves felt over years or in everyday use, are also possible.

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Crash data cannot be erased with an ordinary diagnostic tool. Airbag24 erases it during the repair.

How can you tell that the A0285010034 is defective?

A defect in the A0285010034 reveals itself mainly through the airbag warning light in the instrument cluster, which lights up permanently or only intermittently. Added to this are error messages in the instrument cluster, a diagnostic tool without connection and a fault memory that cannot be cleared.

As long as the control unit is faulty, airbags and seatbelt pretensioners may not deploy in an emergency. This applies regardless of how long the light has been on.

The warning light is the sign that the unit reports its own condition. Take this sign seriously and have it checked promptly.

Which vehicles is the A0285010034 fitted in?

Fitted in these vehicles is the A0285010034: Mercedes-Benz Vito W639 (2003-2014); Mercedes-Benz Viano W639 (2003-2014).

The list of vehicles assigned to this part number follows.

• Mercedes-Benz Vito W639 (2003-2014)
• Mercedes-Benz Viano W639 (2003-2014)

Matching the part number on the label of the removed unit with this page only shows that you have the right unit. Have the fault memory read out before sending it in, because only this result shows 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 0285010349, 285001448, 285001449, 285010033, 285010054, 285010224.

How does the repair of the A0285010034 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

The sequence follows a fixed order for safety reasons. Afterwards you create a repair order online and send the unit in well packed.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. 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 A0285010034 get to Airbag24?

You send the unit A0285010034 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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