viviensturm1
Mercedes CLA Hybrid rough running issue
Summary of the thread
A 2023 Mercedes CLA Hybrid is experiencing rough engine running, stalling at idle, and hesitation during acceleration, with the check engine light on. Diagnostics indicate a potential defective ignition coil, possibly due to a faulty cable or plug. A failing coil pack could indeed cause these symptoms, and checking the spark plugs is also recommended. The issue was resolved by addressing a defective ignition coil and a loose connector.
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4 comment(s)
viviensturm1 (community.author)
Thanks. Are you suggesting spark plug condition and ignition coil failure are linked? Did you have engine hesitation along with the misfire?
benjaminknight57
Yes, similar symptoms. It might not be the only cause, but it is worth checking. I took mine to a workshop, it was easier than doing it myself.
viviensturm1 (community.author)
I appreciate the confirmation about similar symptoms. The workshop advice was good. The problem was a defective ignition coil and a loose connector. The repair cost 95€.
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MERCEDES
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CLA
benjaminknight57
I had a similar issue with my CLA. Misfire, engine stalling, the whole thing. Did you check the spark plugs as well? Could be related.