Buzzing Noise?
#1
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2000 S-Class
Buzzing Noise?
My car lets off a loud buzzin noise when i step on the gas and then let go from a roll. I hear it most at 20 mph when i press on the gas pedal then release it? The sound seems to be emitting from the rear of the car. Any help or input would be aprreciated. Thank you!
#3
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could the buzzing be coming from the sunroof controls next to those little vents? try putting a little magnet there to see if the noise goes away. if it does, i have the same annoying problem and a mechanic says its the hvac motor? whatever that is, but they didnt have it in stock so i could not have it replaced. let me know if you resolve the issue.
#4
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could the buzzing be coming from the sunroof controls next to those little vents? try putting a little magnet there to see if the noise goes away. if it does, i have the same annoying problem and a mechanic says its the hvac motor? whatever that is, but they didnt have it in stock so i could not have it replaced. let me know if you resolve the issue.
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That sounds like the aspirator motor. It's a tiny fan that sucks inside air over a temperature sensor for the climate control. It needed constant replacement in my W140, but fails much less frequently in the W220. When it goes bad it's a faint buzz, and can change during acceleration or deceleration. An exhaust leak sounds totally different, but is also buzzy -- coming from under the rear of the car.
#7
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Yes, "aspirator" means it sucks air into the sensor that's part of the climate-control system. "HVAC" means "Heating, Ventilation and Air-Conditioning," in other words "climate control."
The only times I had it replaced it was on warranty, so I don't know cost. It shouldn't be very expensive I wouldn't think. The motor is cheap and so it all depends on labor, but I don't think it's a big deal to get to.
The only times I had it replaced it was on warranty, so I don't know cost. It shouldn't be very expensive I wouldn't think. The motor is cheap and so it all depends on labor, but I don't think it's a big deal to get to.