Airbag control unit with part number A0285010350

What does the airbag control unit A0285010350 do?

The airbag control unit A0285010350 coordinates the restraint system (SRS) on Mercedes-Benz. It analyses the signals from the crash sensors and, in an accident, selects within milliseconds which airbags and seatbelt pretensioners fire. After an accident it stores crash data and locks itself.

In normal operation it monitors the entire system. If it detects a fault, it stores a fault entry and shows it via the airbag warning light.

It has nothing to do with the drive or the brakes; it works solely for occupant protection.

Why does the control unit A0285010350 fail?

The largest share is held by crash data from an accident, even without an airbag firing; a normal diagnostic tool cannot remove them. Aged electronics, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes, for example from weak batteries or a jump start, are also suspected.

Electronics age, and solder joints can go cold over the years. In addition, moisture reaches the plug contacts and promotes corrosion, which can lead to intermittent faults.

Voltage spikes when starting with a weak battery or during a jump start additionally stress the circuits.

How can you tell that the A0285010350 is defective?

The airbag warning light lights up permanently or intermittently. A fault message appears in the instrument cluster, the diagnostic tool cannot establish a connection to the control unit, and the fault memory cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then possibly not fire.

A light that stays on after the ignition is switched on is the clearest signal that a fault is present in the system. Intermittent indications also require a check.

If you notice these signs, have the vehicle checked promptly.

Which vehicles is the A0285010350 fitted in?

The airbag control unit A0285010350 is fitted in these vehicles: Mercedes-Benz Vito W639 (2003-2014); Mercedes-Benz Sprinter W906 (2006-2018); Mercedes-Benz Viano W639 (2003-2014).

The list below shows in detail the vehicles assigned to this part number.

• Mercedes-Benz Vito W639 (2003-2014)
• Mercedes-Benz Sprinter W906 (2006-2018)
• Mercedes-Benz Viano W639 (2003-2014)

You carry out the comparison of the part number on the label with this page on the removed unit. It shows that you have the right unit, nothing more. Whether the control unit is defective or a plug or cable is causing the fault is established only by the fault memory. So have it read out before removal.

For the same vehicles, we also repair control units with the part numbers 0285010349, 0285011060, 285001448, 285001449, 285010033, 285010054.

How does the repair of the A0285010350 work?

First have the fault memory read out and attach the log; then disconnect the battery and remove the control unit. Testing, repair and function test at Airbag24 usually take 3–4 working days.

Then create the repair order online and send in the well-packed unit.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and runs a function test.

The sequence of removal must be observed for safety reasons.

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 A0285010350 get to Airbag24?

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

Your printed repair order goes into the parcel; you pack the unit shock-proof.