Rear deck rattle
My car (2013 E350 bluetec) has acquired a weird rattle, more like an occasional pop, coming from the rear deck. It just started a couple days ago, and seems to be connected to the newly warm weather - if the car sits in the sun and is driven, I get a click or pop at irregular times from the rear deck area. I went back and pressed hard on all rear deck areas, then drove as normal - stopped the noises for maybe 5-10 minutes, then it returned. This kind of thing drives me nuts.
I have noticed a few others complaining about rear deck noises, but did not notice a solution. Has anyone else experienced this, and had it cured by the dealer? I am somewhat afraid to take it in to have them inspect it, if it is difficult to duplicate - other than simply asking them to take it all apart and reassemble it. I want to guess it is caused by something expanding or contracting with heat, but I don't know what it could be specifically.
Thanks for any ideas.




That's how much it drove me nuts.I usually would try and go back there and kind of push and lightly smack things around, to try and "pop them into place", sometimes it would help for a while. What I found was that both my W212's had rattles that would come and go constantly. Sometimes the car would rattle like crazy from multiple points, forcing me to come here and write threads about it turning into a dreaded "rattle trap", then all of a sudden they'd all disappear. I think before I got out of my last one, it was mostly quiet on the rattles.
I can duplicate a similar noise if I press on the hard plastic on the rearmost section of the deck, above the high mount brake light. I think something there is fighting with the surrounding material, and maybe at the edges by the C-pillars too.
I had the car out today (cloudy and 55F vs sunny and 75F yesterday), virtually no rattles or pops. It's the sun and temperature, seems to be too much of a coincidence otherwise.
I made an appointment at the dealer for tomorrow morning, and am going to suggest some felt be put on the border areas where two different materials/pieces come together. I have a little experience with rattles, coming from a W210 which had a console rattle and sunroof rattle. The former was solved by the felt method, the latter by putting small pieces of cloth between the headliner and roof. Of course, my half century-old W111 is rattle-free.
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In January I traded the 2012 for a 2013 E350. No one else has ever driven the car but me so I know it hasnt been on any advenures. It has been warmer here lately and the rear window has been snapping/cracking. I thought maybe the glue hasn't setsolidly, or maybe the glue never really hardens and the rear window is flexing. Yes, sure is frustrating.
Last edited by fintail; Apr 2, 2013 at 04:13 PM.
I took it in to the dealer, and had an idea to run the heat on its highest setting to keep the interior warm, and create more noise. It kind of worked, I could get quiet creaks from the rear deck, but no pops. I took a test drive with a tech, who seemed to be both looking at the deck and area near where the headliner meets the rear window. He couldn't give a diagnosis as the noise was faint, but said he could disassemble the rear deck and put it back together with care where different materials meet. I am pretty certain this is related to temperature change - it will make noise even when the car is not moving.
Car goes in next Monday. I mentioned the sun shade brackets today and will mention them again Monday, along with looking at the roof panel.
(I know I should have stayed away from the electrically heated armrests.
)
Had it out in the sun and relative warmth today. Within 10 minutes in the sun - snap crackle pop! I parked it outside for a couple hours, and on the way back, plenty of irregularly timed noise. So I headed back to the dealer, right in time for the sun to vanish (spring in Seattle). Went for a ride with the tech I have dealt with before - he now has fair certainty that it is coming from the piece above the center high mount brake light, which apparently needs deck removal again to investigate. Back it goes next Monday...
Car also returned a claimed 42.4 mpg.




That's how much it drove me nuts.I usually would try and go back there and kind of push and lightly smack things around, to try and "pop them into place", sometimes it would help for a while. What I found was that both my W212's had rattles that would come and go constantly. Sometimes the car would rattle like crazy from multiple points, forcing me to come here and write threads about it turning into a dreaded "rattle trap", then all of a sudden they'd all disappear. I think before I got out of my last one, it was mostly quiet on the rattles.
I can duplicate a similar noise if I press on the hard plastic on the rearmost section of the deck, above the high mount brake light. I think something there is fighting with the surrounding material, and maybe at the edges by the C-pillars too.
I had the car out today (cloudy and 55F vs sunny and 75F yesterday), virtually no rattles or pops. It's the sun and temperature, seems to be too much of a coincidence otherwise.
I made an appointment at the dealer for tomorrow morning, and am going to suggest some felt be put on the border areas where two different materials/pieces come together. I have a little experience with rattles, coming from a W210 which had a console rattle and sunroof rattle. The former was solved by the felt method, the latter by putting small pieces of cloth between the headliner and roof. Of course, my half century-old W111 is rattle-free.
I will be taking her in to get this covered under warranty; anyone know the exact TSB on this?










