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Mercedes-Benz C-Class S204 Estate Airbag Control Unit Repair
A204 870 68 26 · Label
- Label
- Connector
- A204 870 68 26
- A204 901 26 04
- A204 901 35 02
- A2049012704
Mercedes-Benz C-Class S204 Estate 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
Mounting position
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 C-Class
- Series
- S204 Estate (2007-2014)
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 C-Class S204 Estate airbag control unit?
The Mercedes-Benz C-Class S204 Estate airbag control unit is your vehicle's central safety unit, precisely triggering all occupant restraint systems, such as airbags and seat belt pretensioners, in the event of a collision. It continuously monitors the connected sensors and stores relevant crash data, thus ensuring the proper functioning of the entire safety system.
This safety-critical component is essential for occupant protection and must always function perfectly. It receives signals from impact sensors and decides in milliseconds whether to activate the respective components.
Why is the Mercedes-Benz C-Class S204 Estate airbag control unit defective?
A Mercedes-Benz C-Class S204 Estate airbag control unit can fail for a variety of reasons, often resulting from internal errors after an accident, stored crash data, short circuits, or voltage spikes in the vehicle electrical system. Moisture or mechanical damage can also lead to failure, impairing the safety function and necessitating repair.
Often, an accident results in crash data being irretrievably stored in the control unit. This blocks the system and requires a reset or replacement.
In addition, low voltage caused by a faulty battery or external interference can damage the sensitive electronics. Broken cables or corrosion on the connectors can also cause the control unit to fail.
If the airbag control unit is detected as defective, the SRS indicator light on the dashboard will illuminate continuously. This indicates that the entire airbag system is not functioning.
Common error codes for Mercedes-Benz C-Class S204 Estate airbag control unit repair
When diagnosing or repairing a Mercedes-Benz C-Class S204 Estate airbag control unit, specific error codes may occur that indicate internal defects or communication problems directly within the control unit. These codes are crucial for identifying the exact cause of the failure and initiating the necessary repair.
- B220800 → Internal error in the airbag control unit → Software or hardware problem in the control unit itself, often after a crash.
- B220700 → Internal error / crash data cannot be deleted → Stored crash data blocks the control unit and cannot be reset.
- B2008 → Internal error in the airbag control unit → General malfunction of the ECU, not sensor related.
- B1000 → Control unit communication error → Connection problems between the airbag ECU and the vehicle electrical system or other modules.
These error codes indicate problems directly with the control unit, not with external sensors or components. Professional diagnostics are essential to determine the specific cause and perform the appropriate Mercedes-Benz C-Class S204 Estate airbag control unit repair.
What part numbers are available for the Mercedes-Benz C-Class S204 Estate airbag control unit repair?
When repairing or replacing a Mercedes-Benz C-Class S204 Estate airbag control unit, specific Mercedes-Benz OEM part numbers must be observed to ensure exact compatibility. These numbers identify the original part and are crucial for the correct selection and function of the control unit in your vehicle.
The following OEM part numbers are 100% verified for the airbag control unit of the Mercedes-Benz C-Class S204 Estate:
- A2048706826 / 2048706826
- A2049013502 / 2049013502
- A2049012704 / 2049012704
Please note that numbers with and without a leading "A" may be identical, as this is a common notation for Mercedes-Benz OEM parts. The correct part number is crucial for a successful Mercedes-Benz C-Class S204 Estate airbag control unit repair.
4.8
Based on 246 reviews
What our customers say
„Ok.“
Zsolt Szabólast week„Works like a charm!“
Leolylast month„Everything went perfectly, I can only recommend it.“
Automatically translated · Original: German
ka irgendwas3 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 Goldammer3 days ago„Airbag control unit Fiat 500 was broken. Hard to believe but they can really repair it! Recommendation!!“
Automatically translated · Original: German
Christian Maegerlein6 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 Buien6 days ago„Uncomplicated service. Fast and thorough. Can only recommend.“
Automatically translated · Original: German
Abdul KSlast week„All great👍“
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Edin Avdiclast week„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“
Automatically translated · Original: German
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“
Automatically translated · Original: German
Sven Wegenerlast week„Ok.“
Zsolt Szabólast week
