GL 450 X166 with 130K Shudder at idle, in gear
Thread Starter
Newbie
Joined: Nov 2023
Posts: 12
Likes: 5
2015 GL450 4MATIC X166
GL 450 X166 with 130K Shudder at idle, in gear
I've got a 2015 GL 450 4MATIC - 130K Miles. New Spark Plugs. Not new coil packs/boots, recent timing chain change.
The car shudders when the engine is in gear and idling, like braking at a stop sign or light. It's pretty consistent, sometimes after driving a while it'll stop doing it at stops. Putting it in park takes about 95% of the shudder away. It completely goes away above 800rpm. What could this be?
The car shudders when the engine is in gear and idling, like braking at a stop sign or light. It's pretty consistent, sometimes after driving a while it'll stop doing it at stops. Putting it in park takes about 95% of the shudder away. It completely goes away above 800rpm. What could this be?
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
How many miles? What is your ownership and maintenance history with this car besides the spark plugs and timing chain?
Read codes.
Does "shudder" include vibration felt in the floor, seat, center console or steering wheel?
Could be coils or oil leaking into the wiring harness from the cam position sensors or cam magnets.
Also could be engine mounts or transmission mount, this would explain vibration in gear, but no vibration in park. These soft rubber components are normal wear-out parts for German luxury vehicles.
Read codes.
Does "shudder" include vibration felt in the floor, seat, center console or steering wheel?
Could be coils or oil leaking into the wiring harness from the cam position sensors or cam magnets.
Also could be engine mounts or transmission mount, this would explain vibration in gear, but no vibration in park. These soft rubber components are normal wear-out parts for German luxury vehicles.
Thread Starter
Newbie
Joined: Nov 2023
Posts: 12
Likes: 5
2015 GL450 4MATIC X166
There’s 130K miles… maintenance is up to date. No other issues.
the vibration is mainly through the seat and body, not in the steering wheel much. It can get to the point I can hear body rattle as much as feel the vibration, but I wouldn’t call it violent.
the vibration is mainly through the seat and body, not in the steering wheel much. It can get to the point I can hear body rattle as much as feel the vibration, but I wouldn’t call it violent.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
If the vibration is noticeable in gear only, it points to engine and transmission mounts. Failed mounts are gradual and become more noticeable over time.
Read codes to rule out ignition problems. Any retail car parts store can read codes for free. Post them there.
Read codes to rule out ignition problems. Any retail car parts store can read codes for free. Post them there.
Trending Topics
Newbie
Joined: Apr 2023
Posts: 9
Likes: 1
From: New Jersey, USA
2014 MB GL450, 2023 BMW X7 M60i, 2020 Bentley Bentayga Design Series, 2014 Bentley Flying Spur W12
My 2014 GL450 with 92k just started vibrating today. I pulled it out of the garage and as soon as it was warm, rpm started to bounce and car was vibrating. Shortly after, the check engine light started flashing and then it became still.
MB World Stories
The Best of Mercedes & AMG
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
10 Most Reliable Mercedes-Benz Models You Can Buy Used
Verdad Gallardo
Newbie
Joined: Apr 2023
Posts: 9
Likes: 1
From: New Jersey, USA
2014 MB GL450, 2023 BMW X7 M60i, 2020 Bentley Bentayga Design Series, 2014 Bentley Flying Spur W12
Spark Plugs and coil packs have never been replaced. It happens sometimes and now I checked it's fine but the light is still there. Do you think it can be a misfire related to the spark plugs or coil packs?
Last edited by Dgeedhar; Jan 1, 2024 at 12:02 AM.
Out Of Control!!
Joined: Sep 2018
Posts: 14,666
Likes: 4,568
From: unbegrenzt
2017 GLE350 4MATIC
