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  1. Auxiliary Battery Replaced and Smog Test Failure.

    Mercedes-Benz CLA 250
    Has anyone experienced failing their smog test after replacing the AUX Battery? Three weeks ago I get a prompt from my 2016 CLA250 indicating that the Aux Battery has failed. I went to the dealership and got it replaced through my warranty. That went well and I went about my business. 2 weeks...
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