StefBey

Mercedes GLS problems again and again the starter does not work

Hello everyone, I have a 2019 Mercedes GLS with a diesel engine and 187654 km on the clock. Recently started having problems: long cold start, sometimes won't start at all, weird engine noises, weak battery when starting, weak or flickering lights and a warning light in the speedometer. Had a bad experience at the last mechanic visit. Has anyone experienced these problems? What was your solution and do you have any good mechanic recommendations? Thanks in advance!

(Translated from German)

A 2019 Mercedes GLS owner experienced issues with long cold starts, engine noises, weak battery, flickering lights, and a warning light. These problems were linked to a faulty alternator and a worn battery. After replacing both, the vehicle's performance improved significantly. It is recommended to check the alternator and battery if similar issues arise.

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4 comment(s)

Hey, I know the problems you're describing all too well. I had similar symptoms with my 2016 Mercedes GLE: long cold start, weak battery and flickering lights. It turned out to be a consequential fault in the vehicle's electrical system caused by a faulty alternator. In my case, the alternator had to be replaced, and there was also a problem with a wiring harness that was damaged and thus affecting the electrics. Once all that was fixed, my GLE worked perfectly again. This was a serious matter that had to be dealt with quickly. If you're looking for a good mechanic, I can recommend going to a specialist for Mercedes vehicles. They are often more knowledgeable than general garages. Good luck and hope your GLS runs smoothly again soon! Regards

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Hey, thanks for the info! Do you remember how much you paid for the repair? Were there any other problems afterwards or did everything run smoothly again? Best regards

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Hey, after I went to the mechanic, it turned out that the engine start might not have been possible because it was a consequential fault in the car's electrics. Fortunately, the mechanic fixed the problem free of charge (0€) as it was a small fault in the wiring harness that was easy to repair. Since then, my Mercedes has been running again without any problems. I hope this helps you! Good luck with your GLS and let me know how it turns out for you. Best regards

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Hey, thanks for your quick reply! It sounds like I might have a similar problem. Today I finally went to the mechanic and lo and behold, the alternator was indeed gone. He also said that the battery was badly worn and had to be replaced. Fortunately, the mechanic nearby had the right spare parts in stock and was able to repair both immediately. The whole thing cost me around €450 in total, but I'm really glad that everything is working again without any problems. The engine noises are gone and the lights are back on as they should be. All in all, I'm pleased that I've finally found a reliable mechanic. If anyone has similar problems with a Mercedes, I can only recommend checking the alternator and battery immediately. Thanks again for your advice! Best regards

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MERCEDES

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GLS