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vincent_koenig60

Mercedes GLA Hybrid Engine Issue Resolved

My 2023 Mercedes GLA hybrid is acting up Engine's running rough check engine light's on Getting some jerky acceleration too Plugged in an OBD reader and there's an error stored Any ideas I'm thinking maybe spark plugs or ignition coil but honestly I wouldn't know Could it be something like the fuel pump crankshaft sensor or even the air filter

4 comment(s)

emilia_knight35

I also own a Mercedes GLA, although not a hybrid. I had similar symptoms – rough running and the check engine light. Turned out I had a leak in my exhaust system. Check for hissing sounds, especially when the engine is cold. Have you noticed any change in fuel consumption, or maybe a smell of exhaust fumes inside the cabin?

vincent_koenig60 (Author)

Exhaust leak, huh? I haven't noticed any hissing or smells, but I'll definitely check. Where exactly should I be looking for this leak? Any specific spots that are common on these GLAs? Also fuel consumption seems normal. And error code does not mention exhaust system.

emilia_knight35

The leak could be anywhere from the exhaust manifold to the catalytic converter. If you can't find it yourself, I would advise against extensive DIY. It's best to take it to a workshop to get it properly diagnosed. They can use a smoke tester to find even small leaks.

vincent_koenig60 (Author)

Thanks for the advice. Took it to the workshop and you were right, it was an exhaust leak. They replaced a section of the exhaust and the uneven running is gone. Cost me 265€. Appreciate the help.

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