E Klasse engine issue

Sounds familiar! I had almost the same issue with my E Klasse, though I don't remember the exact code. I remember experiencing similar symptoms like reduced engine performance and hesitations, especially at lower RPMs. I'm no mechanic, but it felt like my turbo wasn't kicking in when it should. I was constantly getting frustrated with the car. Did you notice any weird noises?

I haven't noticed any weird noises, but the turbo lag is definitely there. It's like the engine is struggling until it finally gets going. What exactly was the problem with your car, and how was it fixed? Was it a simple fix, or was it expensive?

Okay, so mine was definitely the vacuum switching valve. I was hoping it'd be something simple, but no such luck. Honestly, I wouldn't mess with it yourself unless you really know what you're doing. I ended up taking it to a workshop. They sorted it out pretty quickly. It's best to get it checked out properly before you cause more damage.

Thanks a lot for the info! I appreciate you sharing your experience. I'll take it to a trusted mechanic. I had it fixed, it really was the vacuum switching valve. Cost me 140€ including the part and labor. Car runs like new again!