Hi all,

MY 2014 E350 station wagon with about 60K miles on it. Regular oil changes at around 6k miles, always used BEVO approved Castrol Edge 5W-40 A3/B4 synthetic oil.
The engine is loud at idle, engine fully warmed up, the rattle goes away at increased rpm. I heard another M276 engine on youtube, it sounded exactly the same as mine so I am just wondering if this is the normal sound for this engine.
Please have a listen:

 

Sounds like a normal direct injection engine at cold start.

 

The M276 is fairly loud, I believe it is the high pressure fuel pump, mounted at the rear of the right (passenger side LHD) cylinder head.

 

Thanks chassis, I will take a closer listen as to where the sound is really coming from.
Fliplegend, the engine was fully warmed up when i took the video..
I don't have the start up rattle, the engine has the optimized tensioners installed already, although not the check valves, nevertheless start up sound is normal.

 

I recently changed the spark plugs on my 2016. (followed Sr.Leigh's tutorial)
When I started the engine with the hood open and in my garage I really thought i had done something incorrect in the plug job. It was making a racket ! It sounded somewhere between a coffee grinder and a ModelT.
Engine idled down, closed the hood sound went back to normal.
We have sound insulated hoods and inner fenders, as well as a belly pan.
Also,I think direct injection and the 60 degree V of the 276 adds to the noise.

 

It sounds like it is a normally "loud" engine then.
I tried to find that guide, (Sr.Leigh's tutorial), but couldn't.
Is it on this board?

 

I think this is it

https://mbworld.org/forums/e-class-w...ovid-19-a.html

 

Got it, thanks. That guy has some good videos of W212 maintenance.