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SommerUdo

Mercedes AMG GT Hybrid Start Stop Problem

My 2020 Mercedes AMG GT Hybrid with about 24748 km has a start-stop problem. The engine shuts off, but I get a warning light and an error. It seems the automatic restart is failing. Could this be a battery issue?

Summary of the thread

A 2020 Mercedes AMG GT Hybrid is experiencing a start-stop problem where the engine shuts off but fails to restart automatically, accompanied by a warning light and error message. The issue is suspected to be related to the battery, as similar problems in other vehicles have been linked to battery issues. Checking the battery voltage with a multimeter or consulting a professional for diagnosis is recommended. Ultimately, the problem was confirmed to be a defective battery, which was replaced to resolve the issue.

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4 comment(s)

siegfriedeagle41

I had a similar problem with my BMW. The engine stalling and warning lights sound familiar. It was a battery issue. Have you checked the battery's voltage lately? A heavily discharged battery can cause the start-stop system to fail. Has the car been sitting?

SommerUdo (community.author)

I have not checked the battery voltage. Do I need special equipment, or can I do it myself? The car has been driven regularly.

siegfriedeagle41

You can check the voltage with a multimeter, but if you aren't comfortable, take it to a workshop. Considering the error codes, a professional diagnosis is best. It sounds like a battery, but they can confirm and check for other causes.

SommerUdo (community.author)

Thank you for the advice. You were right, it was a defective battery and needed replacing. The repair cost 290€. I appreciate you sharing your experience.

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MERCEDES

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AMGGT