me2ctv

Hi everyone. It has not been that cold out, maybe down to freezing during the night then 50 def F during the day. We've noticed that when warming up the diesel engine for a few minutes when cold sitting over night that there is quite a loud clanging rattle sound coming from the left side of the engine for maybe 5 minutes and then it stops. It's basically new with just over 2000 miles on it. It's not really noticeable inside unless you leave a door open.
Curious if anyone else has noticed this?

I attached a recording using an iPAD. The clanging stops around 10 seconds.


Thanks,
Adrien.

fcch

For my part, I have never heard a difference like we hear in your sound bite.


It's been minimum -25 to -30 (Celsius) here every morning for the past several weeks. I usually start the car with the door open (don't even get into the car) and immediately brush off the snow so I'm outside of the car.


Maybe someone else can chime in with thoughts.

rocketcitybenz

I don't have the diesel version, but from the recording, it sounded more like a sheet metal rattle than anything going on inside the engine. Hard to tell.

fcch

Oops, ... my mistake.

ble2716

According to your original post, you stated that you have a GLK250.
Which is a diesel version.

About the noise, maybe it is a characteristic of a direction inject engine ?

fcch

That's what I thought ... "GLK 250" in the title ... Good Lord, ... maybe you have a diesel engine and don't know it !!

rocketcitybenz

I'm not the original poster. I realize it is a diesel.

emtskibum

every one's perception of rough/loud/rattling is always a little bit different from the next. For what its worth, I have a 2014 250, and on the cold mornings when its been sitting over night, It appears to be a little rough on start up. But once you get er warmed up a bit it goes back to being the same.

me2ctv

Hi. Yes, it's a diesel and the clanging may be a problem. We stopped by the dealer today to talk to the service manager. We're going to need to leave the car overnight so they can have a listen. I'll keep you posted.


Adrien.

me2ctv

Hi. An update:
Here is what was determined by the service department;

The GLK diesel normally makes this clanging noise on warmup. Ours makes it within the first 10 minutes from a cold startup when the temp is around freezing overnight. The clanging usually stops after a couple minutes or so. The noise appears to radiate from the left where the dual turbo chargers are. The mechanic thought the noise was odd but after they listened to other new 2015 GLK diesels on their lot, they found it was normal.



Adrien.

GLKpaul

Thanks for the update me2ctv, its good to know, perhaps its something that will break in over time and disappear since yours is so young yet, or it may be a change in bearings or lubriication thats stiff on cold days and lets itself be known. If anything further to this crops up, please update the post.. Enjoy your MB