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W212 noise when accelerate hard - audio attached

capella313

New Member
Joined
Mar 10, 2022
Messages
15
Location
Norfolk
Car
E CLASS W212 Facelift
Hi guys,

I have recently encountered this problem and would appreciate some guidance from someone.

While accelerating aggressively (lets say over 2.5k, strongly on the right side of the engine), I keep getting this noise from turbo MB. Hard to explain, lol... I'll attach an audio. Feels like air leaks. Few points to mention:
The audio

1. Milleage: 87k
2. From what been done in the past 3 months is only oil transmission change.
3. Checked the air intake hose and turbo/intercoller hose (did not remove them just observ) cant see any cuts or holes.
4. Cant see any leakage
5. No sound when rev in neutral or parked.
6. Nothing on the dash.

Any advice would help, had a quick chat with local guy, he suggested intake hose split somewhere.
 
Last edited:
split of cooler hose is sometimes hard to find...
OM651 intake manifold bolts can loosen, or manfold crack...
 
Hi guys, didnt had time to check the thread.

However, i can confirm it is the intercooler hose(red one - the one to the turbo). Will attach a photo later. Ordered a donor one and new sealants from the Merc. £50+£28. Not bad at all. Will confirm if all good once changed. :)
 

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