GLS Class (X167) Produced 2020 to present

2020 MB GLS450 Noise - Transmission or Brakes?

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Old Yesterday, 09:56 PM
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2020 MB GLS450 Noise - Transmission or Brakes?

I'm looking at buying this GLS and took a test drive and heard a grinding, almost clicking sound when slowing down and braking. The car has about 59,000 miles on it.
After driving the car for 10-15 minutes the sound went away. Have anyone had a similar thing happen? If so, what was the issue and fix/repair?
Would you buy it?
Thanks so much
- Mose

Last edited by mose61; Yesterday at 10:09 PM.
Old Yesterday, 10:22 PM
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'23 GLS450
I would try to avoid MY20 GLS as that was the first year of the current gen!

If you really like the car, hire an independent mechanic to inspect it!
Old Yesterday, 10:30 PM
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Thanks. How's the '23?
Old Yesterday, 10:46 PM
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
Originally Posted by mose61
I'm looking at buying this GLS and took a test drive and heard a grinding, almost clicking sound when slowing down and braking. The car has about 59,000 miles on it.
After driving the car for 10-15 minutes the sound went away. Have anyone had a similar thing happen? If so, what was the issue and fix/repair?
Would you buy it?
Thanks so much
- Mose
My first guess would be they washed the car and the pads rusted to the brake rotors.
I hear that often from mine, except the Clicking doesn't quite fit.
Old Today, 08:03 AM
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'23 GLS450
Originally Posted by mose61
Thanks. How's the '23?
MY23 has been mostly issue-free aside from occasional electronic glitch.
If you want wireless CP/AA, you'll have to buy new or a 1 year old MY24 unfortunately!
Old Today, 08:54 AM
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Originally Posted by EWL5
I would try to avoid MY20 GLS as that was the first year of the current gen!
While I would agree with this if buying new, by now issues should have been resolved under warranty. I have had only a software issue and heated/cooled cupholder switch issue in the 20k mi/21 months of ownership of my 2020. You can always buy an extended warranty as I did. With CPO and extended warranty, I am covered until Feb 2027.
Old Today, 09:07 AM
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Originally Posted by TNS550
While I would agree with this if buying new, by now issues should have been resolved under warranty. I have had only a software issue and heated/cooled cupholder switch issue in the 20k mi/21 months of ownership of my 2020. You can always buy an extended warranty as I did. With CPO and extended warranty, I am covered until Feb 2027.
Pretty sure you can no longer CPO a 2020 as it should be beyond the original 4-yr/50k mile warranty!
Old Today, 09:33 AM
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Originally Posted by EWL5
Pretty sure you can no longer CPO a 2020 as it should be beyond the original 4-yr/50k mile warranty!
That's probably true, but he can buy a Fidelity Platinum warranty like I did for the 2015 S550. I've been very happy with Fidelity.
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Old Today, 12:41 PM
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'21 AMG53 wDPP & ARC, 19 GLC300 - Former- 10&14 ML BlueTecs, 20 GLE450 E-ABC, 15 Cayenne D, 17 Macan
Originally Posted by TNS550
That's probably true, but he can buy a Fidelity Platinum warranty like I did for the 2015 S550. I've been very happy with Fidelity.
In some ways the Fidelity has has better coverage than the CPO.
I go out of warranty next year and I'll probably go with Fidelity.
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