Mercedes GLA engine trouble

My 2015 Mercedes GLA with a gasoline engine is giving me fits. Only done 24774 km. The check engine light is on, power is way down, and it's belching smoke like a chimney when I accelerate. It idles rough, guzzles gas like crazy, bucks like a bronco when accelerating and there's this crazy loud hissing sound when I put my foot down. I'm pretty sure it's the EGR valve causing grief. Could it be jammed or something? Anyone else had this happen? I'm dreading the emissions test. Anyone know what I'm in for, repair-wise?

4 comment(s)

Sounds familiar. I have a Mercedes GLA too, and I had similar issues last year. Check engine light, rough idle, and a bit of hesitation. Could be the EGR valve, like you said. Is it affecting your fuel consumption?

Yeah, fuel consumption has gone through the roof! It is affecting the fuel consumption quite a bit. Did you have the same loud hissing sound? What did you end up doing to fix yours?

No hissing sound for me, but definitely the other symptoms. Honestly, I didn't mess with it myself. Took it straight to the workshop. Turned out to be the EGR valve. They replaced it, and the problem went away. Best to get it checked professionally, especially if you're worried about the emissions test.

Thanks! Appreciate the insight. I was hoping it was something simple, but EGR valve seems to be the culprit. I'll take it to the shop then. They quoted me about 355€ for the automotive repair. Hopefully, that'll sort it out!

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