Airbag control unit with part number A2469001003

What does the airbag control unit A2469001003 do?

The airbag control unit A2469001003 is the central control unit of the restraint system (SRS) in the Mercedes-Benz. It evaluates the crash sensors, decides on the triggering of airbags and seatbelt pretensioners in an emergency, and monitors the system continuously. It indicates detected faults via the airbag warning light.

The manufacturer number Bosch 0285011142 is also printed on the housing. During driving the unit works unobtrusively, and an impact is evaluated in fractions of a second.

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

Why does the control unit A2469001003 fail?

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

Crash data stays in the unit's memory until it is erased during the repair. A vehicle can therefore show a fault long after the accident.

The other causes can also occur without an accident. Damp or corroded plugs disrupt data exchange, and voltage spikes, for example from a weak battery or a jump start, can cause electronic faults.

How can you tell that the A2469001003 is defective?

Typical signs are an airbag warning light that stays on permanently or intermittently in the instrument cluster, an error message in the instrument cluster, no connection to the diagnostic tool and a fault memory that cannot be erased. Then airbags and seatbelt pretensioners may not trigger in an emergency.

• Airbag warning light on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be erased

The warning light gives the clearest indication. If it stays on after the ignition is switched on, a check is required.

Which vehicles is the A2469001003 fitted in?

The airbag control unit A2469001003 is fitted in these vehicles: Mercedes-Benz B-Class W246 (2011-2018). Whether your vehicle is among them can be clarified in advance. The part number alone is not sufficient for that.

The vehicles in detail:

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

Compare the part number on the label of the removed unit with this page, so that you have the right unit. In addition, have the fault memory read out. Only this log shows whether the control unit itself is the cause or whether a plug or cable triggers the fault.

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 A2469001003 work?

First, have the fault memory read out and enclose the log. Then disconnect the battery before removing the control unit. Next, create a repair order online and send the unit in well packed. At Airbag24, testing, repair and function test together usually take 3–4 working days.

Airbag24 examines the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. The unit then goes back 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 A2469001003 get to Airbag24?

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

Place the printed repair order in the parcel and pack the control unit shockproof.