GL Class (X166) 2013-2015 after facelift became GLS (X166)

2015 GL450 slight rattle and shudder when going over bumps

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Old Mar 10, 2018 | 09:13 PM
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2015 GL450
2015 GL450 slight rattle and shudder when going over bumps

I purchased a 2015 CPO GL 450 with the appearance package in Oct last year. Tires on the car are Michelin LTX Premier. 20inch. The tread depth is at 4/32 inch. The tires were replaced at 22k miles, currently I have 38K miles on them.
No issues when driving on the highway.
My dealer advised me to change the tires but I am not sure that is the cause
Any else I need to get checked. Also what is the best tire rated for comfort and long life? It seems that the Michelin's don't last too long.
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Old Mar 12, 2018 | 05:30 PM
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s500
I Have the same car CPO appearance pack and have the same problem on bumps or pot hole , and I have Pirelli tires almost new.
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Old Mar 12, 2018 | 10:13 PM
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2015 GL450
I think it could be a suspension issue. My other car a Lexus RX feels solid over speed bumps and potholes. No shudder or rattles anywhere. I will have the dealer check it out next time I go in.
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Old Mar 15, 2018 | 02:41 PM
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From: Ft Lauderdale
2015 GL450
First time posting, please be gentle.

I have a 2015 GL450 (purchased in January 2018), that has a similar issue; creaking noise coming from the front driver's side suspension when going over speed humps. The vehicle is currently at the dealer. They suspected front axle bearings, even though I mentioned that I can feel it coming from the suspension. The issue persisted after they replaced the front axle bearings. I went on a test drive with the lead mechanic and was able to reproduce the sound. Lead mechanic suspects the noise is coming from the strut and/or the sway bar ends. He also thought he heard a slight clunk which he suspects is bad engine mounts.

I'm, hopefully, picking up my GL tomorrow and I can give an update soon after.
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Old Mar 15, 2018 | 03:37 PM
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Originally Posted by Abey
First time posting, please be gentle.

I have a 2015 GL450 (purchased in January 2018), that has a similar issue; creaking noise coming from the front driver's side suspension when going over speed humps. The vehicle is currently at the dealer. They suspected front axle bearings, even though I mentioned that I can feel it coming from the suspension. The issue persisted after they replaced the front axle bearings. I went on a test drive with the lead mechanic and was able to reproduce the sound. Lead mechanic suspects the noise is coming from the strut and/or the sway bar ends. He also thought he heard a slight clunk which he suspects is bad engine mounts.

I'm, hopefully, picking up my GL tomorrow and I can give an update soon after.
Bad motor mount in a 3 year old GL450 with V6 motor? Very highly doubtful. Your description is not the symptom of a worn motor or trans mount.

I would be looking at worn ball joints, tie rod, and front sway bar.
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Old Mar 18, 2018 | 02:33 PM
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From: Ft Lauderdale
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Originally Posted by DaveW68
Bad motor mount in a 3 year old GL450 with V6 motor? Very highly doubtful. Your description is not the symptom of a worn motor or trans mount.

I would be looking at worn ball joints, tie rod, and front sway bar.
I said the same thing. The dealer said they couldn't replicate the issue. Lubed the suspension and I don't hear the noise anymore. I suspect the noise will be back after the lube wears off.
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