How noisy is your GLA? - Mercedes GLA Forum
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post #1 of 13 Old 06-04-2019, 12:38 PM Thread Starter
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How noisy is your GLA?

Anybody of you measured how noisy is GLA?
I have impression mine is quite noisy. More noisy than my second car - Nissan Quashqai (Rogue).
I used noise meter today. I checked on highway.
GLA Results:
90kmh (56mph)- 66dB
130kmh (80mph)- 70dB
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post #2 of 13 Old 06-04-2019, 12:50 PM
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I can't speak to the dB level, but the GLAs were noisy from first introduction...road and wind sounds. Some additional noise reduction was done for model year 2016, but I am not aware what might have been done since. Many US GLA owners were surprised to find a carpet of sorts at the top of the rear wheel wells (2015 and 2016 models, unsure about later years). That was done as a noise reduction measure for the rear wheels.

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post #3 of 13 Old 06-04-2019, 12:57 PM
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Quote:
Originally Posted by Gregson View Post
Anybody of you measured how noisy is GLA?

I have impression mine is quite noisy. More noisy than my second car - Nissan Quashqai (Rogue).

I used noise meter today. I checked on highway.

GLA Results:

90kmh (56mph)- 66dB

130kmh (80mph)- 70dB
I agree, its noiser than the Corolla and Soul that I have as well as the Encore that I use to have.

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post #4 of 13 Old 06-04-2019, 06:26 PM
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I have a 2018 GLA45 and it seems very quiet to me? MUCH quieter than the Subaru STi had for my previous car. I think my GLA45 is just as quiet as my 2014 E350 wagon I have now too. I remember the quietness being a very odd thing when I bought the car. It was so quiet I couldn't use that as a reference for speed, and I was going way too fast all the time. In the STi I could almost tell how fast I was going with my eyes closed! Ha ha ha!

I wonder if it is the tire difference? I've got the 20" Conti Sport Contact 5P on mine. Maybe the tires on the GLA250/220 are the main cause of the noise?

Road surface plays a major factor, but obviously we'd be talking about using the same roads for a comparison.

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post #5 of 13 Old 06-04-2019, 07:59 PM
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My 2017 45 is quieter than my Porsche 997 but not as quiet as my F250.

But it did get quieter when I installed the Michelin MP4S tires (vs the 20" Contis).

Tires can make a big difference.

But there is wind and mechanical noise as well.

A couple years ago there were some posts about adding sound deadening material inside the doors and elsewhere. This was a part of adding high end audio systems.

This is an A (not E) Class vehicle ... Something to be remembered.
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post #6 of 13 Old 06-05-2019, 02:15 PM
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Depends on the road. The car itself can be very quiet on the right road but can get noisy on other roads. I would say the car itself is fairly well-isolated for its price-bracket, and tire noise is the primary factor.
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post #7 of 13 Old 06-06-2019, 07:47 AM
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Michelin tires have always helped quiet road noise for me, as well as aiding in a more comfortable ride. Being "entry level" the GLA is not as quiet as Mercedes is generally noteworthy, but still good for a CUV/SUV.

Related, it's also interesting that the GLA doesn't have a hood insulation pad, yet the CLA does. Perhaps greater engine-hood clearance in the GLA so not deemed necessary for heat insulation and again CUV so not deemed worthy of greater sound deadening.


Quote:
Originally Posted by Wayne View Post
My 2017 45 is quieter than my Porsche 997 but not as quiet as my F250.

But it did get quieter when I installed the Michelin MP4S tires (vs the 20" Contis).

Tires can make a big difference.

But there is wind and mechanical noise as well.

A couple years ago there were some posts about adding sound deadening material inside the doors and elsewhere. This was a part of adding high end audio systems.

This is an A (not E) Class vehicle ... Something to be remembered.

2018 GLA 250 AWD in MA and FWD in FL
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post #8 of 13 Old 06-28-2019, 12:28 PM
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I believe the run flat tires are a big part of it. I'm getting new non run flat tires today and I'll report back on any noise reduction. I expect some.

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post #9 of 13 Old 06-28-2019, 03:13 PM
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Replacing the OEM tires on my rig improved tire noise significantly. You're in for a treat.
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post #10 of 13 Old 06-28-2019, 05:12 PM
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Got the new tires... BF Goodrich G-Force Comp 2 A/S
Definitely quieter and smoother.... NOICE!

I'll post this in another thread, but since these are not RF tires what should inflation pressure be? 35psi?

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