2021 GLE350 Cylinder Head Failure??!!?




There is reason to keep modern cars under warranty as they age.
At least they don't have intermediate shaft bearings....
Thank you!
Noise from the valves or a rattling sound is quite annoying, and there’s a noticeable kick in the engine when turning it on or off, and burning oil, I noticed all that before and after cylinder head was replaced.
I’m wondering if this is normal sound, similar to diesel trucks?
Does MBUSA offer an extended warranty on cylinder heads after they’ve already been replaced?
Has anyone else had the cylinder head replaced and encountered any issues again?
Any recommendation after having the cylinder head replacement? I read online it's said recommend to do an oil change at 100-300 miles after cylinder head replacement, how accurate is that?
Attached video.
I really appreciate all the information.
Last edited by TMK-MB; Nov 29, 2025 at 03:36 PM.








Noise from the valves or a rattling sound is quite annoying, and there’s a noticeable kick in the engine when turning it on or off, and burning oil, I noticed all that before and after cylinder head was replaced.
I’m wondering if this is normal sound, similar to diesel trucks?
Does MBUSA offer an extended warranty on cylinder heads after they’ve already been replaced?
Has anyone else had the cylinder head replaced and encountered any issues again?
Any recommendation after having the cylinder head replacement? I read online it's said recommend to do an oil change at 100-300 miles after cylinder head replacement, how accurate is that?
Attached video.
I really appreciate all the information.




Robert
Last edited by robert c; Dec 22, 2025 at 11:06 PM.
The Best of Mercedes & AMG
https://mbworld.org/forums/glc-class...ml#post9252695
Noise from the valves or a rattling sound is quite annoying, and there’s a noticeable kick in the engine when turning it on or off, and burning oil, I noticed all that before and after cylinder head was replaced.
I’m wondering if this is normal sound, similar to diesel trucks?
Does MBUSA offer an extended warranty on cylinder heads after they’ve already been replaced?
Has anyone else had the cylinder head replaced and encountered any issues again?
Any recommendation after having the cylinder head replacement? I read online it's said recommend to do an oil change at 100-300 miles after cylinder head replacement, how accurate is that?
Attached video.
I really appreciate all the information.




Last edited by FireRx Captain; Jan 14, 2026 at 02:40 PM.
A member on Facebook shared that Canada has issued an extended warranty on these parts.
US has not done the same yet. This is an issue and I'm pursuing a class action lawsuit as it has defrauded us with engines that fail far before any comparable engine.
My ended up having metal in the oil filter so it was a total loss. This issue is getting worse as these vehicles age.







