Mercedes GT Roadster rough engine behavior

My 2018 Mercedes GT Roadster with the gasoline engine is experiencing rough engine behavior. It has about 31466 km on the clock. Recently, starting has become difficult, fuel consumption seems higher, and the engine feels less powerful. Idling is uneven, and it even stalled a couple of times at a stop light. I suspect a dirty injection valve. Could this be the source of the misfire and performance issues I'm seeing?

4 comment(s)

Sounds familiar. I had a similar issue with my GT. Misfire, rough idle, the whole nine yards. Have you checked the injection nozzles?

You think so? I haven't pulled them yet. Did you experience the same symptoms? What was the fix?

Yeah, almost identical. It was a defective injection nozzle. Replacement sorted it out. I'd recommend getting it checked at a workshop to be sure.

Thanks for the insight. I took it to a workshop, and you were right. Defective injection nozzle. Replacement and repair cost me 515€. Runs like new now!

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