Quick delivery and it works perfect in my Mercedes W203! 👌👌
Mercedes-Benz CLA C118 airbag control unit repair
Mercedes-Benz CLA C118 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.
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Possible airbag error codes for a defective airbag control unit:
Our estimated repair time for this product is about: 3–4 business days
Specifications
- Make
- Mercedes-Benz
- Model
- Mercedes-Benz CLA
- Series
- C118 Limousine (2019-XXXX)

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.
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4.8What is a Mercedes-Benz CLA C118 airbag control unit?
The Mercedes-Benz CLA C118 airbag control unit is the central control unit for your vehicle's passive safety system. It detects accidents, precisely deploys airbags and seatbelt pretensioners, and stores important crash data. This module is fundamental to your safety and requires professional repair if it malfunctions.
It continuously monitors signals from crash sensors and is crucial for coordinating all restraint systems. Any malfunctions in this system are immediately indicated by the airbag warning light. A professional Mercedes-Benz CLA C118 airbag control unit repair can restore safety.
Why is the Mercedes-Benz CLA C118 airbag control unit defective?
The Mercedes-Benz CLA C118 airbag control unit often malfunctions because it stores event-specific crash data after an accident and then locks up. Internal electronic errors or voltage surges can also cause failure. A professional Mercedes-Benz CLA C118 airbag control unit repair is essential in such cases.
After activation, the module permanently stores the crash data, which locks it for further operation and keeps the airbag warning light active. Deleting the crash data is only possible with special diagnostic software. A faulty control unit can also be caused by water ingress or a faulty power supply.
Such defects lead to internal circuit failures that affect the entire functionality of the airbag system. Precise diagnostics are required to determine and correct the exact cause of the failure.
Common error codes for Mercedes-Benz CLA C118 airbag control unit repair
Typical error codes for the Mercedes-Benz CLA C118 airbag control unit indicate internal module defects or communication problems within the vehicle's network. These codes are crucial for accurately diagnosing the airbag system and essential for determining the correct type of Mercedes-Benz CLA C118 airbag control unit repair.
- B220700: Internal error in the "Supplemental Restraint System" control unit → This code signals a hardware or software defect directly in the airbag control unit itself.
- B2D97: Airbag control unit N2/7 is defective → Directly indicates a general defect or functional failure of the airbag control unit.
- B2735: PASS-Key Programming Mode Active → This code indicates a status of the airbag control module related to the immobilizer system that requires a reset.
- C1020: CAN communication error → Indicates a general fault in the data transmission on the CAN bus, affecting the airbag control unit.
- C1021: CAN communication with EA/CC/ISC control unit interrupted → Specific communication error with other safety-relevant control units, relevant for the airbag control unit repair.
- C1024: CAN communication with engine control unit interrupted → Error in the communication between the airbag and engine control unit, which can lead to system malfunctions.
- C1025: CAN communication BAS with ESP control unit faulty → Indication of communication problems between the airbag module and the brake assist or ESP system.
What part numbers are available for the Mercedes-Benz CLA C118 airbag control unit repair?
For a successful Mercedes-Benz CLA C118 airbag control unit repair, the exact OEM part numbers are crucial for compatibility and function. These numbers identify the specific airbag control unit for your Mercedes-Benz CLA C118 model and ensure that the repair can be performed correctly.
Compatibility is ensured by these numbers and the vehicle's chassis number. When performing repairs, ensure the correct part number assignment to ensure a smooth replacement or reset.
Here are some verified OEM and supplier part numbers for the Mercedes-Benz CLA C118 airbag control unit:
- A1779024119 (Mercedes-Benz) and 0285020211 (Bosch): Common OEM numbers that have been confirmed multiple times for the airbag control unit in the CLA C118.
- A1779006604 (Mercedes-Benz): Also used for CLA C118, A-Class W177 and B-Class W247 and is a common variant.
- A1179005800 (Mercedes-Benz) and 0 285 011 863 (Bosch): These are specifically relevant for the repair of the CLA-Class airbag control unit.
- A2479005709, A2479012202, A1779027911, A1779044100, A1779028211 (all Mercedes-Benz): Other official Mercedes-Benz part numbers that also fit the CLA C118.
These numbers are exclusively for airbag control units and have been verified multiple times to guarantee correct assignment for your Mercedes-Benz CLA C118 airbag control unit repair.
Based on 200 reviews
What our customers say
„Quick delivery and it works perfect in my Mercedes W203! 👌👌“
„Very professional handling. Everything worked super fast, the information about the status of the processing was very good.“
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„Had the error SRS Airbag Service urgent on my Volvo C30. At Volvo they could only determine that the error with code CFFF cannot be reset. Proposed solution 865 € for a new module, plus removal and installation and codin…“
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„Fast repair, top, friendly quick contact also for Luxembourg. Gladly again Greetings Serge“
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„At first sight I had no confidence. But I don't regret it. Repair ordered, calculator sent, within a few days I had the diagnosis and the payment order. As soon as the payment was made my calculator came back in perfect…“
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„Everything worked out“
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„All great, removed it myself, brought it in and picked it up 4 days later and installed it.Works again thanks“
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„Everything Top“
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„Fast, simple and uncomplicated“
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„This company is top. They answer questions immediately. Despite holidays everything went really fast. Simply a great company.“
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„What should I say normally, 5 stars are too few TOP I am MEGA satisfied. Can only recommend it. Greetings Thomas Umlauf“
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„Was easy and worked great!!!“
Automatically translated · Original: German
„Quick delivery and it works perfect in my Mercedes W203! 👌👌“



