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Mercedes-Benz E-Class W212 Saloon airbag control unit repair
A212 901 42 04 · Label
- Label
- Connector
- A212 901 42 04
- A212 901 85 08
- A2129011105
Mercedes-Benz E-Class W212 Saloon 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?incl. VAT plus 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 E-Class
- Series
- W212 Saloon (2009-2016)
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
Useful information about Mercedes-Benz E-Class W212 Saloon airbag control unit repair
A Mercedes-Benz E-Class W212 Saloon airbag control unit is the heart of the occupant protection system and specifically activates airbags and seatbelt pretensioners in the event of an accident. It continuously monitors sensors in the vehicle, stores critical crash data, and is responsible for the precise activation of the restraint systems to provide the best possible protection for occupants.
This electronic control unit, often installed in the center tunnel or under the glove compartment, communicates with other vehicle systems via the CAN bus. It is crucial for safety in the Mercedes-Benz E-Class W212 Saloon.
It processes sensor signals from acceleration and impact sensors to decide in milliseconds whether activation is necessary. Correct functioning is essential for safety.
Why is a Mercedes-Benz E-Class W212 Saloon airbag control unit repair necessary?
The Mercedes-Benz E-Class W212 Saloon airbag control unit often fails because it stores crash data after an accident or has internal errors that cause malfunctions. Other common causes include communication problems with other vehicle modules or an age-related defect that necessitates repair.
After an impact, so-called crash data is irretrievably stored in the control unit, making it impossible to restart the vehicle without prior repair and erasure. This is a common reason for replacement.
Internal hardware or software errors can also lead to system failure, often manifested by specific error codes in the error log. Professional diagnostics are essential in this case.
A defective control unit prevents the airbags and seatbelt pretensioners from functioning properly, significantly compromising vehicle safety. Therefore, a Mercedes-Benz E-Class W212 Saloon airbag control unit repair is of utmost importance.
Common error codes for Mercedes-Benz E-Class W212 Saloon airbag control unit repair
During Mercedes-Benz E-Class W212 Saloon airbag control unit repairs, specific error codes occur that indicate a malfunction of the control unit itself and allow for a precise diagnosis. These codes often signal internal defects or communication problems that require immediate attention to restore vehicle safety.
- B1000: Control unit defective / communication error with airbag ECU → Indicates a failure of the control unit or its lack of communication with the vehicle network.
- B220700: Supplemental Restraint System (SRS) control unit internal error → Indicates an internal hardware or software error within the airbag control unit that requires repair or replacement.
- B2207: Airbag control unit (SRS) internal control unit fault → Another variant of an internal defect in the airbag control unit that affects its functionality.
These error codes are stored in the vehicle's error memory and can be read using suitable diagnostic tools. They are crucial for the targeted repair of the Mercedes-Benz E-Class W212 Saloon airbag control unit.
It's important to distinguish these codes from other sensor-specific errors, as they point directly to the control unit itself. A professional workshop can provide precise assistance here.
What part numbers are available for the Mercedes-Benz E-Class W212 Saloon airbag control unit repair?
For the Mercedes-Benz E-Class W212 Saloon airbag control unit repair, several manufacturer part numbers are stored for this repair product, including A212 901 42 04 and A2129010700. The part number is printed on the label of the airbag control unit and can be stated in your repair order so that the unit is clearly identified.
The manufacturer part numbers A212 901 85 08, A2128200485, A2129011105, A2129014304 and A2129018801 are also stored. They belong to airbag control units of this model. Compare the number on your unit's label with the list, as even small deviations can lead to compatibility problems.
Further matching part numbers are listed in the part number list on this page.
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 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 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 Maegerlein5 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 KS6 days ago„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“
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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
