The ABS light continues to come on. on 2007 Mercedes-Benz E350

I had a wheel alignment, brake replacement, and frontwheel bearing replaced. After the repairs the ABS light comes on when driving and stays on. What is the cause??

Asked by for the 2007 Mercedes-Benz E350
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1 more answer
Maybe the wheel speed sensor was left unplugged after the bearing replacement? Can you bring it back to the shop that did the repairs ,to check?