9062 on Mercedes-Benz: How to Diagnose & Fix
Airbag Device Control - Wrong/Incorrect Coding
1 Mercedes-Benz model · 1 documented issue · $80-$400 repair
9062 on Mercedes-Benz by model: symptoms, diagnosis and fix
CLA owners frequently see an 'Auxiliary Battery Malfunction' message on the dash. The CLA uses a small secondary 12V battery to support electronics and the start/stop system; it typically degrades after roughly 4-6 years. A weak auxiliary battery, or a charging fault (alternator/voltage regulator, loose connections), triggers the warning and can cause intermittent electrical glitches in the infotainment, lighting and start/stop function, sometimes with a stored 9062 fault.
Common Symptoms
- 'Auxiliary Battery Malfunction' dash message
- Intermittent infotainment/electrical glitches
- Start/stop system inoperative
- Flickering lights
How to Fix
Test and replace the auxiliary battery (a low-cost part located near/behind the engine bay fuse area); clear codes after replacement. If the warning returns, diagnose the charging system — check alternator/voltage regulator output and clean/secure ground and battery connections. Verify the main starter battery health at the same time, as it is the CLA's most common breakdown cause per ADAC data.
What you need to fix it
Only diagnosis- and fitment-reviewed repair parts are linked here.
- Genuine Mercedes-Benz 12V 14Ah auxiliary battery 000-982-96-08-64OEMMercedes-Benz 000-982-96-08-64 (A0009829608 supersession fam
Auxiliary-battery replacement after load-test failure and physical/VIN confirmation Fitment/availability: The inspected direct U.S.
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Sources for this issue (3)
9062 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does 9062 mean on a Mercedes-Benz?
9062 stands for "Airbag Device Control - Wrong/Incorrect Coding." 9062 is a Mercedes-Benz SRS (Supplemental Restraint System / airbag) control-unit fault code, titled "Device control airbag, wrong code," and corresponds to OBD-II code B1062. It indicates the airbag control module's coding/configuration does not match the airbag device(s) actually installed in the vehicle — typically logged after a control unit is swapped, replaced, or not properly coded to the vehicle, causing the SRS warning light to illuminate. On Mercedes-Benz it is documented across 1 model: CLA.
What are the most common causes of 9062?
The most common causes of 9062 are: Airbag/SRS control unit was replaced or swapped but not coded (SCN-coded) to the specific vehicle, Control unit installed from a different model, year, or specification with mismatched variant coding, Incorrect or incomplete software/variant coding after a repair or retrofit, Mismatch between the control unit's stored configuration and the airbag/restraint hardware fitted (e.g., changed airbag or seat option), Corrupted control-unit memory or failed coding/initialization procedure, Wiring/connector or component fault causing the module to read an unexpected device configuration. The specific cause varies by vehicle.
How much does it cost to fix 9062 on a Mercedes-Benz?
Published repair estimates on Mercedes-Benz range from $80 to $400 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for 9062 on a different make?
View 9062 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.