Moisture freezing around sunroof seal and cracking/popping
Thread Starter
MBWorld Fanatic!
Joined: Feb 2008
Posts: 2,829
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'20 GLC300 SUV
Moisture freezing around sunroof seal and cracking/popping
Summary:
- In December, drove the car in heavy snow.
- Parked car in warm garage overnight.
- Drove in cold, dry conditions the next day.
- Residual moisture left on roof froze around the sunroof seal, resulting in loud creaking, cracking, and popping noises on the roof that could be heard from the cabin when driving. Happened on 2 separate occasions.
I've lived through dozens of Indiana winters and have never once noticed this issue before on any other cars, except my C43. Have had the C43 for 2 winters, and this behavior is "new." Anybody else in a similar climate ever notice this?
Note: This car has had a myriad of issues, and I have the option of exiting the vehicle at no cost (so long as I purchase/lease a new Mercedes), or ride it out for for another year and leave the brand. If this sunroof issue is a "unique" issue, I don't think I can take this car anymore lol.
- In December, drove the car in heavy snow.
- Parked car in warm garage overnight.
- Drove in cold, dry conditions the next day.
- Residual moisture left on roof froze around the sunroof seal, resulting in loud creaking, cracking, and popping noises on the roof that could be heard from the cabin when driving. Happened on 2 separate occasions.
I've lived through dozens of Indiana winters and have never once noticed this issue before on any other cars, except my C43. Have had the C43 for 2 winters, and this behavior is "new." Anybody else in a similar climate ever notice this?
Note: This car has had a myriad of issues, and I have the option of exiting the vehicle at no cost (so long as I purchase/lease a new Mercedes), or ride it out for for another year and leave the brand. If this sunroof issue is a "unique" issue, I don't think I can take this car anymore lol.
Super Member
Joined: Sep 2015
Posts: 725
Likes: 189
From: Chicago area
2015 E400 and 2015 GLK350
I haven't noticed it from my pano roof, but I often note this sort of noise from my trunk lid, and occasionally from the hood. The hood noise is the worst, as no matter how much I lube the bumpers and weatherstripping, as long as it is cold out (I'm near Chicago. . . of course it gets cold) the hood creaks like an old beater. I just figure that when I finally sell the car, it will have to be in the warm weather months.
Thread Starter
MBWorld Fanatic!
Joined: Feb 2008
Posts: 2,829
Likes: 95
'20 GLC300 SUV
I haven't noticed it from my pano roof, but I often note this sort of noise from my trunk lid, and occasionally from the hood. The hood noise is the worst, as no matter how much I lube the bumpers and weatherstripping, as long as it is cold out (I'm near Chicago. . . of course it gets cold) the hood creaks like an old beater. I just figure that when I finally sell the car, it will have to be in the warm weather months.
My roof only acts up when there are little strands and ribbons of ice freezing around the weatherstripping in 2 locations: where the top of the windshield meets the roof and the periphery of the sunroof.
I mean, I see the logic of how that situation could produce noise, but because I've never noticed it with any other car, I'm leaning toward the noise being an unwanted anomaly, as this should be a problem that is accounted for when designing/engineering/testing the car.
Super Member
Joined: Mar 2018
Posts: 740
Likes: 135
From: Westchester County, NY
‘15 C300 4M Sport, ‘20 GLC300
Maybe the seals are dirty/gritty. Try wiping them down with a mild cleaner and then applying a silicone spray or Gummi Pflege.
https://mbworld.org/forums/c-class-w...oof-doors.html
https://mbworld.org/forums/c-class-w...oof-doors.html
Thread Starter
MBWorld Fanatic!
Joined: Feb 2008
Posts: 2,829
Likes: 95
'20 GLC300 SUV
Maybe the seals are dirty/gritty. Try wiping them down with a mild cleaner and then applying a silicone spray or Gummi Pflege.
https://mbworld.org/forums/c-class-w...oof-doors.html
https://mbworld.org/forums/c-class-w...oof-doors.html
All that said, to clarify, my issue only appears when precipitation freezes at the aforementioned locations, and I have the regular sunroof, not the pano roof.
