2018 GLS450 M276 Bi-Turbo thermostat stuck open
Thread Starter
Newbie
Joined: Oct 2018
Posts: 11
Likes: 0
2009 C300 Sport 4matic
2018 GLS450 M276 Bi-Turbo thermostat stuck open
Hi all,
I'm trying to replace the thermostat after I noticed the check engine light and the inability to hold operating temp after long drives. Looking at the engine it seems like I have to move the intercooler out of the way and possibly the serpentine belt if I want to access the 3 bolts holding the thermostat to the engine.
I wanted to ask if this is the right approach or if there is a simpler method before I started wrenching away. Seems like they packed everything super tight on this engine 😅
The car only has 56k miles. Im surprised the thermostat went out already 🤷♂️
I'm trying to replace the thermostat after I noticed the check engine light and the inability to hold operating temp after long drives. Looking at the engine it seems like I have to move the intercooler out of the way and possibly the serpentine belt if I want to access the 3 bolts holding the thermostat to the engine.
I wanted to ask if this is the right approach or if there is a simpler method before I started wrenching away. Seems like they packed everything super tight on this engine 😅
The car only has 56k miles. Im surprised the thermostat went out already 🤷♂️
Thread Starter
Newbie
Joined: Oct 2018
Posts: 11
Likes: 0
2009 C300 Sport 4matic
Nevermind all, I found my answer after a bit more research. Here is a link to a thread that outlines the replacement for this engine
https://mbworld.org/forums/e-class-w...hermostat.html
https://mbworld.org/forums/e-class-w...hermostat.html
Junior Member
Joined: Feb 2025
Posts: 21
Likes: 3
Nevermind all, I found my answer after a bit more research. Here is a link to a thread that outlines the replacement for this engine
https://mbworld.org/forums/e-class-w...hermostat.html
https://mbworld.org/forums/e-class-w...hermostat.html
Thanks for posting this!
