Mercedes GLC Engine Problems and Turbo Issues

Sounds rough I had something similar happen with my old Audi A4 Turned out to be a faulty turbo actuator valve It caused all sorts of weird issues, like reduced power and strange noises Does the noise seem to be coming from the turbo area Have you checked for any obvious leaks or loose connections around the turbo

Yeah the noise seems to be coming from that area I had a quick look but couldn't see any obvious leaks I guess I need to check better What exactly does the turbo actuator do anyway Is it easy to check You mentioned actuator valve, is it the same as the turbo actuator

The turbo actuator controls the boost from the turbocharger If it's not working right, you won't get the right amount of boost, leading to those symptoms The actuator valve is the same as the turbo actuator Honestly, unless you're really comfortable working on cars, it's probably best to take it to a shop They can diagnose it properly and replace the actuator if needed Could be an electrical bypass valve defective, a faulty pressure sensor or something else entirely Better safe than sorry

Okay, thanks I kinda figured it was beyond my skillset Dropped it off at the shop this morning Turns out it WAS the boost pressure actuator fault They're replacing the electrical bypass valve, and the repair cost will be around 250€ Appreciate the help

Hi did you get the matter resolved as I am having the same issue. Thanks

If you're experiencing similar issues, start by checking for any obvious leaks or loose connections around the turbocharger area. Listen for any unusual noises that might indicate a problem. If you're not comfortable inspecting it yourself, it's best to have a professional mechanic take a look, as issues with the turbo system can affect vehicle performance and safety. Let me know how it goes or if you have any further questions!

Thanks I have done the smoke check and changed the inlet manifold gasket as it had a small split. The problem still remained, then did the vacuum test and changed the pressure converter/transducer. Checked all the wast gates and they both ok. Which makes me think it’s the turbo Blow off/bypass valve. The issues I have is lack of power/heesi sound when accelerating and bad fuel consumption.

It's good that you've already checked for leaks and replaced the inlet manifold gasket. Since the problem persists, inspecting the turbo blow-off/bypass valve is a logical next step. A faulty valve can cause the symptoms you're experiencing. Check for any signs of damage or malfunction in the valve. If you're unsure about the inspection or replacement process, consider having a professional mechanic evaluate it to ensure safety and proper diagnosis. Let me know how it goes or if you have any further questions!