Originally Posted by Adrian_MB_owner

Update on my previous post
No luck for me on getting the knocking noise fixed - they said it's normal, it's the characteristic of the car; if I'm not completely satisfied with my car (as they truly want me to be) I should trade it in and pick some other car. The service manager said those things looking me straight into my eyes.
Now, they did replace the timing belt and the tensioner and that did make things better as there is less overall noise coming from the engine in the morning. The knocking though is still there on the cold engine.
They did also replace the lower control arms (on both sides the dust protector rubber was ripped) as it was obvious this issues should have not passed certification.
They lubricated the sunroof seal all around and the noise coming from it is much more muffled now - I can still hear it though.
All in all, they did what they absolutely must have done, and stopped short on dealing with the expensive part (replacing the pistons and connection rods). Now I'm really curious if I would have gotten better service from Kia - as they pointed out to me several times when they sold me the car that "I would get Mercedes-Benz service; this is not a Kia".
I whish I knew how this works, who pays for this work? Why would a dealership be pushing back on something that is obvious and admitted by Mercedes-Benz (Xentry TIPS LI03.10-P-060916)? Is the dealer that sold the car partly responsible for the repair; do they have to pick up part of the repair bill?
I will enjoy the car for a while now and I'll try to get this issue fixed at another dealer in a couple of months. The good thing is that in the Toronto area there are about 10 MB dealerships, 4 of them within 30 minutes drive from where I leave.
Still love the car though; I just whish I could have been able to put this issue behind me...

Originally Posted by Adrian_MB_owner

Update on my previous post
No luck for me on getting the knocking noise fixed - they said it's normal, it's the characteristic of the car; if I'm not completely satisfied with my car (as they truly want me to be) I should trade it in and pick some other car. The service manager said those things looking me straight into my eyes.
Now, they did replace the timing belt and the tensioner and that did make things better as there is less overall noise coming from the engine in the morning. The knocking though is still there on the cold engine.
They did also replace the lower control arms (on both sides the dust protector rubber was ripped) as it was obvious this issues should have not passed certification.
They lubricated the sunroof seal all around and the noise coming from it is much more muffled now - I can still hear it though.
All in all, they did what they absolutely must have done, and stopped short on dealing with the expensive part (replacing the pistons and connection rods). Now I'm really curious if I would have gotten better service from Kia - as they pointed out to me several times when they sold me the car that "I would get Mercedes-Benz service; this is not a Kia".
I whish I knew how this works, who pays for this work? Why would a dealership be pushing back on something that is obvious and admitted by Mercedes-Benz (Xentry TIPS LI03.10-P-060916)? Is the dealer that sold the car partly responsible for the repair; do they have to pick up part of the repair bill?
I will enjoy the car for a while now and I'll try to get this issue fixed at another dealer in a couple of months. The good thing is that in the Toronto area there are about 10 MB dealerships, 4 of them within 30 minutes drive from where I leave.
Still love the car though; I just whish I could have been able to put this issue behind me...

Originally Posted by Adrian_MB_owner

Update on my previous post
No luck for me on getting the knocking noise fixed - they said it's normal, it's the characteristic of the car; if I'm not completely satisfied with my car (as they truly want me to be) I should trade it in and pick some other car. The service manager said those things looking me straight into my eyes.
Now, they did replace the timing belt and the tensioner and that did make things better as there is less overall noise coming from the engine in the morning. The knocking though is still there on the cold engine.
They did also replace the lower control arms (on both sides the dust protector rubber was ripped) as it was obvious this issues should have not passed certification.
They lubricated the sunroof seal all around and the noise coming from it is much more muffled now - I can still hear it though.
All in all, they did what they absolutely must have done, and stopped short on dealing with the expensive part (replacing the pistons and connection rods). Now I'm really curious if I would have gotten better service from Kia - as they pointed out to me several times when they sold me the car that "I would get Mercedes-Benz service; this is not a Kia".
I whish I knew how this works, who pays for this work? Why would a dealership be pushing back on something that is obvious and admitted by Mercedes-Benz (Xentry TIPS LI03.10-P-060916)? Is the dealer that sold the car partly responsible for the repair; do they have to pick up part of the repair bill?
I will enjoy the car for a while now and I'll try to get this issue fixed at another dealer in a couple of months. The good thing is that in the Toronto area there are about 10 MB dealerships, 4 of them within 30 minutes drive from where I leave.
Still love the car though; I just whish I could have been able to put this issue behind me...

Originally Posted by Ironjim1

Question, so my dealer did the rist pin rod and piston work to my 2015 C class sometime back. They had me bring the car in after the parts arrived. They had my car for three days. Most seem to describe the car being at the dealer much longer. Maybe in part because the dealer was waiting for parts. Does three days seem really quick for the level of work if they had the parts when they brought the car in?
Thanks

Originally Posted by Ironjim1

Question, so my dealer did the rist pin rod and piston work to my 2015 C class sometime back. They had me bring the car in after the parts arrived. They had my car for three days. Most seem to describe the car being at the dealer much longer. Maybe in part because the dealer was waiting for parts. Does three days seem really quick for the level of work if they had the parts when they brought the car in?
Thanks

Originally Posted by gfmohn

This is what my C300 sounded like. When the weather turned cold in early Nov., I heard it on starting cold for a few days. When the car warmed up, I no longer heard it. Then the weather turned warm again, and I didn't hear it at all. (My hearing is still very good.) Like yours, my C300 was delivered in early Feb. 2015. It has a little over 5000 miles.

When I took my C300 4MATIC into my dealer to see about several small items, the service foreman and I took the car out on the local expressway to check on wind noise. To the immense credit of my dealer, the foreman heard a faint rattle in the engine. I had heard it only when starting cold. The car had to have the PISTONS replaced! I lost the use of it from Nov. 12 until Dec. 8. (almost a month). The problem is actually a manufacturing defect in the wrist pins. If left unrepaired, it causes premature wear in the cylinder walls.

MASSC300 has found a reference to the MB tech bulletin for this, but the bulletin itself is behind various paywalls. The summary explains the problem. The bulletin is:
When I picked up my car, I told the foreman that I was worried that the mechanic that worked on my car might lack experience on such a big job on such a new model. The foreman laughed and told me not to worry, that they had already repaired MANY examples of this problem! The dealer had had to wait ten days for parts, because they have to compete with cars on the assembly line for parts. MB suppliers cannot make them quickly enough! The foreman did not say whether MBUSA was replacing the wrist pins on new MBs before they are sold. (The defective parts are in engines made before April 20, 2015. [This is the correct information, as corrected on 01/03/05. See note below.])
[Note added 01-03-15: see the comment by deafcon at https://mbworld.org/forums/c-class-w...il#post6612605. So that readers do not have go to deafcon's comment, here is the operative sentence, "Any M274 built at the Infiniti plant in Dechard before serial number ~43000, or built in Germany before roughly serial ~400000 could develop the problem. New wrist pins went into production engines starting April 20th.]

As of Nov. 12, I found two other owners reporting this in MBWorld. (They identified their problem as "wrist pins.") Now there are more. You mentioned two threads where similar problems are reported:
https://mbworld.org/forums/c-class-w...ine-noise.html (the present thread) and
https://mbworld.org/forums/c-class-w...e-startup.html

In addition to these two MBWorld threads, there are other reports at
https://mbworld.org/forums/c-class-w...your-w205.html and
https://mbworld.org/forums/c-class-w...-rattling.html

In addition to the new, 2-liter I4 of the U.S. C300, the engines of following vehicles are also covered in this TSB. The models are: the 2015 Mercedes Benz C180, 2015 Mercedes Benz C200, 2015 Mercedes Benz C220, 2014 Mercedes Benz C250, 2015 Mercedes Benz C250, 2014 Mercedes Benz C300, and 2015 Mercedes Benz C400. I am puzzled why those engines share this defect. The engines of the 2014 Mercedes Benz C300 and the 2015 Mercedes Benz C400 are not new designs. Those models have the older, 3-liter V6 engine. I am not familiar with the engines of the other models.

I hope this does not become as big a problem for MB as The Dreaded Balance Shaft Gear problem that affected certain V6 and V8 engines into MY 2007. My previous 2007 C280 was part of that problem. However, I did not get notice that I was a member of the class-action lawsuit against MBUSA until after I had traded in the car on my current MB.

Originally Posted by H8onit

I wish I could found this thread sooner. My car has 30k on the clock build date of 2/2015 and it's being dropped off Monday to the dealer. Can't wait to see what they have to say about it.

Originally Posted by dieseldoc

They hopefully will find the problem and get it fixed. Do you have the window sticker for your car? Where was the engine built? Germany or USA.

Originally Posted by H8onit

Both built in Germany

Originally Posted by H8onit

Both built in Germany

Originally Posted by gfmohn

Glad to hear you confirm that German engines really are involved. I had been saying just that, based on what I recalled from some other comments. However, I couldn't locate those comments, and so, I was not certain. This ought to drive a stake through the heart of snide comments about alleged problems with the quality of American assembly.

I also regard the so-called assembly problems of rear quarter trim, wind noise, and most of the other MY 2015 problems as being design problems. For example, body parts should be designed to "click" into place (perhaps with the help of jigs) with no call for judgment (and possibility of error) on the part of the assemblers.

Originally Posted by dieseldoc

I agree with you. I do not think we can blame where the car is made. I have driven W205s made in 2015 that have been built in Alabama as well as in South Africa. They are no different. The last loaner I had was a 2017 W205 made in SA. The engine was made in Dechard and ran very well. The engine seemed no different than the engine in my GLC. I also have owned a GL that I had for 8 years. The trucks major issue was not how it was assembled but issues with German built Diesel engine.