Sound while Driving
Thread Starter
Junior Member
Joined: Nov 2022
Posts: 58
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From: Central Florida
EQS 450+ SUV
Sound while Driving
So when I am cruising down the road I often hear what sounds like a fan blowing under the SUV. It gets louder when I accelerate and when coasting it almost disappears. Sometimes it's louder than other times. Any ideas what this is? It's definitely not road noise.
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From: Reading PA
26 EQS 400 SUV, 23 EQS 580 SUV (sold), 19 X7 (sold), 17/14 GLS550 (sold), 13 GL550 (sold)
The electric motors would be my guess. Generally you should be hearing them more when recuperating or braking. They make a whining sound when recuperating energy.
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From: Brookshire, Texas & Cat Spring, Texas
2019 SL550/2023 EQS 580 SUV
Motors is my guess also but isn’t there a sound generator on the outside of the EQS to warn pedestrians you are near by? I have terrible hearing even with aids but have had a passenger claiming they heard something similar.
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From: Reading PA
26 EQS 400 SUV, 23 EQS 580 SUV (sold), 19 X7 (sold), 17/14 GLS550 (sold), 13 GL550 (sold)
When decelerating, the electric motors become alternators to regenerate electricity. They do make an audible sound that can be heard in the cabin. Normal for this car. Use the View mode to see when electricity is being sent back into the battery.
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From: Florida
The cars have sound regardless of whether you turn on or off the sound generator options when driving. You'll hear a light whoosh or almost wind like sound. Its very faint, but its there even if you don't use the louder and more video game sound modes.
Thread Starter
Junior Member
Joined: Nov 2022
Posts: 58
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From: Central Florida
EQS 450+ SUV
YES! That's a perfect description of what I am hearing. Its a woosh like wind and is faint but seems to randomly get louder. I will try turning off sound generator and see if that helps.
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MBWorld Fanatic!
Joined: Feb 2013
Posts: 2,616
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From: Reading PA
26 EQS 400 SUV, 23 EQS 580 SUV (sold), 19 X7 (sold), 17/14 GLS550 (sold), 13 GL550 (sold)
I believe several posts are describing the sound of the electric motors regenerating electricity. The first time we test drove an EQS 450 sedan it sounded like a fan running at times but I believe it's just the sounds of regen.
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Yes I think this is probably it because it is prominent on deceleration.
