Deceleration noise/whine
05-29-2012, 07:22 PM
#1
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2012 C63
Deceleration noise/whine
I just recently noticed a subtle whine when I let off the gas at around 75mph in 7th. Immediately stops as soon as I get back on the throttle even a little bit. Haven't noticed it at any other speeds. Any ideas?
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08-16-2017, 03:05 AM
#2
I have exactly the same issue. It seems to have appeared after straight piping the secondary cats.
I thought it could be LSD fluid on it's way out, had it changed but the soudnd remains.
It's especially evident in lower gears in high RPM ranges upon deceleration.
It's a low humming / groaning sound which stops as soon as I press the accelerator pedal.
I thought it could be LSD fluid on it's way out, had it changed but the soudnd remains.
It's especially evident in lower gears in high RPM ranges upon deceleration.
It's a low humming / groaning sound which stops as soon as I press the accelerator pedal.
Last edited by bullitt69; 08-16-2017 at 07:52 AM.
08-16-2017, 07:49 AM
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2012 P31 C63 Coupe Trackrat, 2019 GLE63S Coupe Beast
Have your diff fluid checked/changed..
