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Mercedes-Benz B-Class W246 airbag control unit repair
Mercedes-Benz B-Class W246 airbag control unit repair at Airbag24
Airbag24 repairs defective airbag control units professionally and affordably. Both private customers and workshops can order without registration and benefit from fast processing, 2 years' statutory liability for defects and plug&play installation.
Airbag24 works with state-of-the-art diagnostic technology and specialised repair processes. Because defective control units often involve only individual components, a professional overhaul can be considerably cheaper than buying new.
Our advantages: no registration required, a direct online ordering process for B2B and B2C customers, express shipping and comprehensive quality testing. The repaired control unit works like a new part.
Notes
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Repair type
Which repair matches your fault code?excluding VAT and shipping
Not sure? Just send us an enquiry or give us a call — we're happy to advise you.
4.8Google reviews of our shop(246)
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Matching part numbers
Your part number isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
Repair time
Our estimated repair time for this product is about: 3–4 business days
Which repair matches your fault code?
Below your code you can see what needs to be done.
Your error code isn't listed? The list isn't complete – we can usually repair it anyway. Simply create a repair order, or ask us first.
Specifications
- Make
- Mercedes-Benz
- Model
- Mercedes-Benz B-Class
- Series
- W246 (2011-2018)
Shipping & repair from Germany
Airbag24 repairs your component in Berlin — usually within 3–4 working days.
Standard shipping within Germany is free; we normally return your part by UPS.
You pay for and insure the inbound shipment to us. On explicit request we ship by express — the extra cost is borne by the customer.
If you withdraw from the contract, you bear the cost of returning the item.
Google reviews
4.8Based on 246 reviewsView all reviews →
Works like a charm!
Everything went perfectly, I can only recommend it.
Automatically translated · Original: German
From the first phone call, the order processing, to the shipping everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can finally pass the HU there again (failed because of the red light for the airbag). Today the message came from SWE, the car is running again, the red light is off and the HU was also passed. Once again many thanks for the help in need. Keep it up and maybe word will also spread in SWE that Airbag 24 does great work. Regards Gerd
Automatically translated · Original: German
Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!
Automatically translated · Original: German
Everything worked out great! Read out fault memory, sent it in, received offer and sent in the defective control unit. Got it back repaired after 3 days, price exactly as in the offer. It can't get any better 👍
Automatically translated · Original: German
What is a Mercedes-Benz B-Class W246 airbag control unit?
The Mercedes-Benz B-Class W246 airbag control unit is the central safety component that continuously monitors all sensors of the airbag system. It receives crash data and controls the precise deployment of the airbags and seatbelt pretensioners in the event of an impact. A functioning unit is essential for the vehicle's safety.
This control unit was specifically developed for the Mercedes-Benz B-Class W246, built between 2011 and 2018. It is the heart of the passive safety system.
It processes data from crash sensors and seat occupancy sensors, allowing occupant protection to be activated in a targeted manner in the event of an accident.
The component is connected to all airbag modules via dedicated cable harnesses. The yellow connectors indicate its safety relevance during a Mercedes-Benz B-Class W246 airbag control unit repair.
Why is the Mercedes-Benz B-Class W246 airbag control unit defective?
The Mercedes-Benz B-Class W246 airbag control unit often malfunctions because it stores crash data after an accident, which disables the system. This is indicated by a permanent airbag warning light. Internal hardware errors or communication problems with other systems can also cause failure and require a Mercedes-Benz B-Class W246 airbag control unit repair.
A primary cause of a defect is the storage of crash data after an accident. This data blocks the control unit and must be professionally erased.
Common fault patterns include a permanently illuminated airbag warning light or the lack of any communication with the control unit during diagnosis.
An internal hardware error in the control unit itself can also lead to failure. In such cases, a professional repair at a specialized workshop is essential to restore the broken control unit to working order.
Common error codes for Mercedes-Benz B-Class W246 airbag control unit repair
Common error codes for Mercedes-Benz B-Class W246 airbag control unit repairs indicate internal problems. The specific code B9111 signals stored crash data and a system blockage. Communication errors or hardware defects in the control unit are also typical messages that require immediate diagnosis and repair to deactivate the airbag warning light.
- B9111 → Internal error, crash data stored → The control unit is locked and requires repair of the stored data.
- No communication → Control unit not reachable → A broken connection or an internal defect prevents diagnosis of the airbag ECU.
- Control unit defective → Hardware error in the device → Internal damage to the control unit requires it to be repaired or replaced to resolve the failure.
What part numbers are available for the Mercedes-Benz B-Class W246 airbag control unit repair?
For the Mercedes-Benz B-Class W246 airbag control unit repair, the only verified OEM part number is A246 900 75 02 from Mercedes-Benz. This has been confirmed on independent platforms for the W246 series. No other directly compatible OEM replacement numbers from suppliers are officially documented for this specific airbag control unit.
Part number A246 900 75 02 is the original Mercedes-Benz OEM number for the airbag control unit in the B-Class W246. It is 100% verified and crucial for the correct selection during a repair.
This number has been confirmed by independent sources such as Airbag24.de and Fahrzeugteile.online. It is considered the only confirmed part number for this specific model and function.
No other directly compatible OEM part numbers from suppliers such as Bosch or Continental could be found for this specific airbag control unit in the W246. Therefore, providing this OEM number is crucial for a successful Mercedes-Benz B-Class W246 airbag control unit repair.
4.8
Based on 246 reviews
What our customers say
„Ok.“
Zsolt Szabólast week„Works like a charm!“
Leoly4 weeks ago„Everything went perfectly, I can only recommend it.“
Automatically translated · Original: German
ka irgendwas2 days ago„From the first phone call, the order processing, to the shipping everything was done very quickly and professionally. Now I still have to send the repaired unit to the Swedish workshop and then hopefully the Honda can fi…“
Automatically translated · Original: German
Gerd Goldammer2 days ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerlein4 days ago„Everything worked out great! Read out fault memory, sent it in, received offer and sent in the defective control unit. Got it back repaired after 3 days, price exactly as in the offer. It can't get any better 👍“
Automatically translated · Original: German
Toni Buien5 days ago„Uncomplicated service. Fast and thorough. Can only recommend.“
Automatically translated · Original: German
Abdul KS5 days ago„All great👍“
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Edin Avdic6 days ago„All great, fast delivery. Thanks.“
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Andrej Ivanovlast week„100% satisfied. Everything handled very professionally and transparently. Only the return shipping took too long. This was however due to UPS and less to Aairbag24. Thank you very much“
Automatically translated · Original: German
Dennis Welast week„VAG airbag control unit with error B2000 00 reliably repaired. Price very high in comparison, but everything worked out. No exact protocol of what was carried out, probably just newly flashed“
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Tokeh Tokehlast week„A great shop, even when there are sometimes problems. There are quick responses and very good help. I can only recommend the shop. Thank you very much“
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Sven Wegenerlast week„Ok.“
Zsolt Szabólast week
