Tire noise on deceleration - Pirelli 21s
Thread Starter
Member
Joined: Nov 2020
Posts: 81
Likes: 23
From: Ontario
2023 Jeep Grand Cherokee Summit Reserve
Tire noise on deceleration - Pirelli 21s
I only have been able to put about 400 miles on my GLE, but am loving it so far. So much so, I’m wondering why I wasted time on the Aviator. Every switch, stalk, texture, material, etc is so much better than I’ve experienced in the past. Even the key fob has a higher quality feel.
Some differences are notable. The GLE has an actual gas cap. How quaint! Couple Lincoln pluses are the track forward button on the steering wheel, leather stitched airbag cover and turn signals showed up in the HUD. Also, the external cameras in the Aviator have convenient sprayers, and it’s rear wiper is hidden in the spoiler, lending the rear to a cleaner look.
Anyway, on the GLE, I have been hearing some (rear) tire noise on deceleration, which seems out of place for this vehicle (that, and the fact you can hear the rear camera deploying, for some reason - should be silent) and upon investigation I found out that the tires were significantly overinflated. I assume this is due to a sloppy PDI, but I have lowered them significantly to the recommended light load pressures. The ride is much better, even with the air suspension, but I still hear tire tread harmonics while slowing down to a stop. Not super loud and no vibration whatsoever, just sound in the cabin. It might just be due to the steamroller tires on the back.
Normal or might I have a bad tire?
Some differences are notable. The GLE has an actual gas cap. How quaint! Couple Lincoln pluses are the track forward button on the steering wheel, leather stitched airbag cover and turn signals showed up in the HUD. Also, the external cameras in the Aviator have convenient sprayers, and it’s rear wiper is hidden in the spoiler, lending the rear to a cleaner look.
Anyway, on the GLE, I have been hearing some (rear) tire noise on deceleration, which seems out of place for this vehicle (that, and the fact you can hear the rear camera deploying, for some reason - should be silent) and upon investigation I found out that the tires were significantly overinflated. I assume this is due to a sloppy PDI, but I have lowered them significantly to the recommended light load pressures. The ride is much better, even with the air suspension, but I still hear tire tread harmonics while slowing down to a stop. Not super loud and no vibration whatsoever, just sound in the cabin. It might just be due to the steamroller tires on the back.
Normal or might I have a bad tire?
MBWorld Fanatic!
Joined: Oct 2009
Posts: 7,018
Likes: 2,199
From: Colorado
'21 AMG53 wDPP & ARC, 19 GLC300 - Former-03 C240,2 ML BlueTecs,20 GLE450 E-ABC,15 Cayenne D,17 Macan
There is a small sound of the electric ISG as it decelerates you. Could that be it?
There is a corresponding green indicator in the tach part of the instrument cluster that shows amount of electric retardation.
Is there a correlation?
There is a corresponding green indicator in the tach part of the instrument cluster that shows amount of electric retardation.
Is there a correlation?
Thread Starter
Member
Joined: Nov 2020
Posts: 81
Likes: 23
From: Ontario
2023 Jeep Grand Cherokee Summit Reserve
I want it to be clear that it sounds like big tires slowing to a stop, as in the last few seconds of deceleration at a stop sign. I wouldn’t imagine a Mercedes would allow that into the cabin. And I have the acoustic package, FYI.
Super Member
Joined: Apr 2021
Posts: 645
Likes: 204
From: Central Indiana
2021 GLC 300 4Matic
Having had my GLE for only 3 days, I hear, on most stops, a noise when decelerating as well. For mine, I wouldn't say it's a tire noise but reminds me more of a brake noise although the brakes feel fine. I haven't been able to get out and bed them in yet so maybe that will take care of it.
Thread Starter
Member
Joined: Nov 2020
Posts: 81
Likes: 23
From: Ontario
2023 Jeep Grand Cherokee Summit Reserve
Having had my GLE for only 3 days, I hear, on most stops, a noise when decelerating as well. For mine, I wouldn't say it's a tire noise but reminds me more of a brake noise although the brakes feel fine. I haven't been able to get out and bed them in yet so maybe that will take care of it.
Trending Topics
Super Member
Joined: Dec 2013
Posts: 630
Likes: 177
From: SW Ontario Canada
2020 GLS580, 2023 Corvette Z06
It's a Mercedes thing. The pads are excellent however and for my driving style etc. last up to 100,000km on my last 2 Mercedes.
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
MBWorld Fanatic!
Joined: May 2018
Posts: 3,391
Likes: 1,040
From: Boise
2024 GMC Canyon Denali..... 2018 Audi SQ5
Having had my GLE for only 3 days, I hear, on most stops, a noise when decelerating as well. For mine, I wouldn't say it's a tire noise but reminds me more of a brake noise although the brakes feel fine. I haven't been able to get out and bed them in yet so maybe that will take care of it.
MBWorld Fanatic!
Joined: Jul 2003
Posts: 6,771
Likes: 1,264
From: Lake Oswego, OR
2020 GLE 450; 2023 BMW M2 Coupe
Brake dust
Mercedes & BMWs I've had are bad for brake dust unless you get the carbon ceramic ones. Be aware if you use the advanced driving features it will be worse as the brakes are used for lane correction, etc.
MBWorld Fanatic!
Joined: May 2018
Posts: 3,391
Likes: 1,040
From: Boise
2024 GMC Canyon Denali..... 2018 Audi SQ5
Audi also uses brakes on some models for Torque Vectoring. The rear inside wheel gets mild braking to slow that side. It makes for better handling in corners but shorter rear brake life. Since the fronts normally wear faster than the rear it might not change replacement times.
