Airbag control unit with part number A0285010215

What does the airbag control unit A0285010215 do?

The control unit A0285010215 manages the restraint system (SRS) in Mercedes-Benz. In an accident, it evaluates the signals from the crash sensors within milliseconds and decides which airbags and seatbelt pretensioners are triggered; at the same time, it monitors all components.

If the unit reports a fault, the airbag warning light in the instrument cluster displays it. After an accident, it stores crash data and locks itself.

While driving, the driver notices nothing of this as long as everything is in order.

Why does the control unit A0285010215 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, because a normal diagnostic tool cannot erase them. Other causes include ageing components, cold solder joints, moisture and corrosion, and voltage spikes.

• Ageing electronic components
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from a weak battery or a jump start

The fact that no airbag has deployed does not mean that no crash data were stored. Which cause applies in a specific case cannot be named with certainty before the fault memory has been read out.

At Airbag24, stored crash data are erased during the repair.

How can you tell that the A0285010215 is defective?

A defect in the A0285010215 can be recognised by several signs: the airbag warning light in the instrument cluster lights up, and there are fault messages, connection problems, or a fault memory that cannot be erased.

• The airbag warning light in the instrument cluster stays on permanently
• Or it only lights up intermittently
• Fault messages in the instrument cluster
• The diagnostic tool finds no connection to the control unit
• The fault memory cannot be erased

If you notice one of these signs, airbags and seatbelt pretensioners may not trigger in an emergency. For that reason, the warning deserves attention.

The signs only show that something in the system is wrong. Which component is affected is determined only by the read-out.

Which vehicles is the A0285010215 fitted in?

The A0285010215 is fitted in these vehicles: Mercedes-Benz ML-Class W164 SUV (2005-2011); Mercedes-Benz GL-Class X164 SUV (2006-2012).

The overview shows the vehicles for this number:

• Mercedes-Benz ML-Class W164 SUV (2005-2011)
• Mercedes-Benz GL-Class X164 SUV (2006-2012)

Two checks come before removal. Comparing the part number on the label of the removed unit with this page merely confirms that the unit is the right one. The fault memory, by contrast, shows whether the control unit itself or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1648209826, 285001535, 285001993, A 164 820 57 85, A1648204326, A1648204426.

How does the repair of the A0285010215 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

At Airbag24, the team tests 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.

Processing at Airbag24 usually takes 3–4 working days; this time covers only testing, repairing and checking.

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 A0285010215 get to Airbag24?

You can send the unit either as a parcel that you post yourself, or with a UPS collection booked for an extra charge. The return after the repair is made by UPS.

Place the printed repair order in the consignment and pack the control unit A0285010215 shock-proof.