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Managed to measure the sound level inside & outside the car at this setting:-

E200 W213 since Oct 2018, air con switched on with fan at 5 speed. All measurements with Radio Shack Sound Level Meter with 'A' rating & with 'Slow' response. These parameters are necessary to measure the sound level impact to our hearings.

50 dBA = Private office setting

60 dBA = Normal conversation

70 dBA = Sound of vacuum cleaner

80 dBA = Curbside on busy street

1) Inside driver seat and all doors & windows closed with engine running: 52 dBA

2) Inside driver seat & with driver door open: 58.5 dBA

3) Car all doors & windows closed with air con on & standing infront of the front car boot: 63 dBA

4) Car all doors & windows closed with air con on with front car boot open & standing infront of the front car boot: 74.5 dBA

So far, W213 is probably the quietest car for E class. Would be interested to find out if others have better sound attenuation resulting in lower sound levels as shown above. Regards.

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mine is a 2010 w212.

Inside the car with aircon on, it is very quiet, only can hear road noise and engine.

Open the windows, I will hear the gear changing sound.. like cluck cluck cluck..

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