simonmoeller5

Mercedes ML engine issues and wastegate concerns

My 2015 Mercedes ML gasoline engine with 208254 km is having issues The check engine light is on, power is reduced, engine response is poor, and it sometimes stalls at idle Fuel consumption is also up I hear whistling and hissing during acceleration Is this a bad pressure sensor, throttle body, or MAP sensor I suspect a wastegate valve issue

4 comment(s)

Sounds familiar I had a similar issue with my old 2012 Ford Focus diesel Check engine light, power loss, the works In my case, it turned out to be a wastegate problem too Have you checked for any obvious leaks around the turbo area That whistling and hissing could point to that

Regarding the leaks around the turbo area, I am not entirely sure how to check for those Could you perhaps provide a bit more detail on how to identify potential leaks, or what to look for specifically

Well, without proper tools it's tricky I mainly listened closely with the hood open while someone revved the engine a bit But honestly, if you're not confident, it's best to get it checked professionally Wastegate issues can mess with boost pressure and cause more problems down the line The cost you mentioned doesn't sound too far off what I paid back then

Your comments were helpful, and I appreciate you sharing your experience I took the car to my trusted mechanic, and after a thorough inspection, they confirmed the issue was indeed a faulty wastegate valve The repair cost ended up being exactly as I had anticipated, 860€ The car is now running smoothly again

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