anyone hear high pitch noise on highway? It sounds like Jet plane engine. usually on 8 or 9 transmission and around 70mph.
jumpman726
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Mar 2, 2026
- Join DateJul 2013
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It could be the sound from the turbos.
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Hmmm...The turbo is pretty much hushed on my E300. It could be true that the OP's hearing is more sensitive to the frequency that the turbo emits.Originally Posted by jumpman726
It could be the sound from the turbos.
Quote:
hmm probably it's not the turbo's sound because it sounds whenever I press a accelerator even on the cruise on highway.Originally Posted by jumpman726
It could be the sound from the turbos.
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Quote:
Those are the moments when the turbo works. It spins up along with the engine's RPM. But if you hear it at certain speed or range of speed, it could be a air flow disturbance or mechanical issue.Originally Posted by bluechappy
hmm probably it's not the turbo's sound because it sounds whenever I press a accelerator even on the cruise on highway.
