teksurv

Got my car back. My invoice looks much like VFORCE09's. The "check valve" seems to be related to the tensioners themselves. I've only had the opportunity to test the fix one time so far and it sounds good to me. Will test a few more times to be sure. I can post my invoice if anyone wants it, and thanks to all for your input on this.

JaredP

Teksurv, I'd be interested in the invoice scan.

EDIT: Didn't see VFORCE posted his, no need to post yours if its the same.

andrewpang3

Merc diagnosed the issue on my car yesterday and parts ordered as per the TSB.

Unfortunately according to my service advisor up here in Canada, Germany has not sent them the tools required for the operation and they have been waiting for over a month.

lsmonaco

Hi Vforce09,
Would you please send me a copy of your invoice. I am having the same issue with my C280 and could not find here in Brasil a dealer with right response on the case.
I thank you for you help.

flagman

I am experiencing the same noise - almost always on warm starts. Sounds like someone shaking a can full of marbles - sometimes lasts for about 5 seconds.

I mentioned it to the service advisor at my last visit to the dealer (M-B Mississauga), she claimed it was normal, something to do with the design of the direct injection system. Claimed her B class did it all the time too. It sounded like BS to me and I pushed her on it but she wouldn't budge. I insisted she write it into the service log anyway, just in case of a problem down the road.

I keep trying to record it but sure enough, every time I start the sound recorder on my phone, the engine starts with out the sound. I guess I have to start doing it on every single warm start and maybe I''ll get something I can make them listen to at the dealership. Along with the info. in the above posts, this might make them do something.

I find it hard to believe that this won't cause any damage to the engine if it continues for years.

JaredP

Your SA is full of BS. Show her the attached fix document, it's what I had done to my M276 and it fixed the knocking noise.

Also this thread:
https://mbworld.org/forums/c-class-w...ml#post5952569

It's a 6-8 hour job.

flagman

Thanks JaredP. I will definitely be taking this up with the Service Manager. Seeing as how this bulletin dates from July of last year, I don't appreciate the Service Advisor BS'ing me in March of this year that the noise is normal and there is no fix for it.

Vickon

Hello guys, I've been to the dealer a total of three times telling them the same issue (engine noise) at start up mostly after car has cooled down. I've been told by the stupid advisor that it is normal and that all C300 do have the same "knocking" sound at startups! My factory warranty expired in May 24th, 2014. Although I made sure that he write it everytime I went for service. I received a couple of calls from the MB Headquarters wanting feedback from me regarding the service visit. I told them all three times that I was NOT satisfied and that I did NOT belived that the "knocking" sound was normal either!!! What do you recommend? Should I call MB Headquarters and voice my concern? Should I go to my dealer with this "work order"?
Car runs fine with no missing or any problem other than that bothersome/embarrassing knocking f... g noise!!!


Thanks for your input guys!


Vickon

JaredP

The document I posted is not regarding your engine, which is the 3.0L M272, not the 3.5L M276 in 2013+ C300s. I haven't heard of this issue in M272s but if it was documented and ignored, I would bet you still have a chance if it being serviced under warranty.

Akashc250

did you figure out what the issue was? I have the exact same thing going on.