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Exploding sunroof??

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Old 04-02-2024, 03:27 PM
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2022 CLA 35 AMG; 1985 Porsche 928S
Exploding sunroof??

Curious if anyone has successfully gotten MB to pay for this. Anyone?

I have a '22 CLA 35 AMG. While driving on the highway with light rain, my sunroof suddenly *exploded* into a million pieces. Sounded like a gunshot and shocked the hell out of me. Nothing hit me (that I could tell) and I did not hit a bump in the road or anything.

It's sitting at the dealer right now as I wait for a call back from MB Customer Service. I'm seeing lots online about class action lawsuits against MB for this exact issue.

I'm glad the screen was closed, or else the interior (and me) would have have been showered in broken glass. WTF?!?!?




Old 04-03-2024, 09:16 AM
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I would definitely file with the NHTSB, in addition to any class action, as this is a safety issue.

Why don't people ever put their location?
Old 04-03-2024, 10:07 AM
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(added my location)

I filed a report with NHTSA's website yesterday.

I also spoke directly with MB USA yesterday. They are looking into whether MB will pay part or all of the repair cost (initial estimate is $1800). I'm not optimistic MB will actually pay anything. If not, I plan to contact counsel for the class action suit.
Old 04-03-2024, 10:11 AM
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Originally Posted by BigDaveK
(added my location)

I filed a report with NHTSA's website yesterday.

I also spoke directly with MB USA yesterday. They are looking into whether MB will pay part or all of the repair cost (initial estimate is $1800). I'm not optimistic MB will actually pay anything. If not, I plan to contact counsel for the class action suit.
Thanks.1. Knowing where you are located helps.

Good luck. You may be surprised that MB may cover everything.
Old 04-03-2024, 05:38 PM
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Correction on the estimate: It just increased to $2,825

Still waiting to hear back from MB.
Old 04-03-2024, 05:43 PM
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Originally Posted by BigDaveK
Correction on the estimate: It just increased to $2,825

Still waiting to hear back from MB.
I was going to say $1800 seemed cheap. There are a few threads around with this on other models. I wouldn't say it's a common issue from reading the forum.

I remember one person saying it happened while parked in his garage so there was no way something hit it.
Old 04-03-2024, 08:23 PM
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Originally Posted by wildta
I was going to say $1800 seemed cheap. There are a few threads around with this on other models. I wouldn't say it's a common issue from reading the forum.

I remember one person saying it happened while parked in his garage so there was no way something hit it.
$1800 us probably the dealer's cost. Just be glad it ain't an SL Vario magic tinting roof (or whatever it's called). $13,000!!!
Old 04-04-2024, 05:56 PM
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Mark this as the least-surprising update of the day: MB denies any responsibility and is pointing to the 12 month warranty for glass.

They're offering nothing.

This will be the first and last Mercedes I purchase.
Old 04-05-2024, 08:20 AM
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I would appeal that first answer, arguing this is not a windshield or door glass, but an integral part of the structure of the body. Chances are, the first numb-nut that responded looked up "glass roof" on their cheat-sheet, couldn't find it, and just gave you the answer for window glass.

If you find other owners that have experienced this, make that known as well.

You said you filed a complaint with the NHTSA. I would follow up or file a second complaint and include Mercedes' response. Include all this information in your appeal. Become a "squeaky wheel". Mention that you are active on a number of social media platforms (MBWorld, Facebook, LinkedIn, etc.) and are happy to share your experience. In the mean time, get the roof replaced (check your car insurance for glass coverage -- tell them you were hit by a meteorite or other space object) and keep all of your receipts.

Sorry for your problems. That sux. I'm beginning to think it is best to NOT buy a Mercedes new, but rather get one 7-10 years old that has good maintenance records. Good ones have had all the problems worked out at someone else's expense.
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Old 04-09-2024, 12:19 PM
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For those following along, my insurer is covering the cost and my agent encouraged me to stop pushing the "defect" argument since it could lead the insurer to deny the claim. It's easier for the insurer to approve the claim if they treat this as the result of some object hitting the sunroof.

The estimate of course keeps growing. In addition to the sunroof, they will also replace the sunscreen due to the likelihood that pieces of glass damaged it. It doesn't increase my immediate cost (i.e., my deductible) and is a good thing since the repair shop now has to remove the headliner. I'm hoping that means they should be able to get all of the little pieces of glass so I won't heard them moving around up there.

At the end, I'll have the full repair but I'll always be wondering when the sunroof might randomly explode again. No more pano sunroofs for me, and no more MBs based on how MB and the dealer acted.

I did contact the attorney leading (one of) the class action cases, but no response.
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Old 04-09-2024, 12:57 PM
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Glad your insurance is covering it. I am sure you don't have the lizard or ostrich company. Good idea that it was not due to a defect. And you really may have been hit by falling space debris.

WRT whether owning another Mercedes or not, you likely would have been met with a similar response from any other manufacturer. Even Honda would not cover a (prematurely) deteriorated sun roof seal on a CPO car. But I know how you feel. Still, I would look very closely at a Honda CR-V over a Mercedes GLB if shopping for a new or used car. I own or have owned a total of three Mercedes after years of being a VAG guy and will likely get another used Mercedes if I need to get another car. I was serious when I said a Mercedes a few years old is probably a better deal since these cars depreciate quickly.
Old 04-09-2024, 01:20 PM
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This should make you feel better!

Old 04-12-2024, 08:41 AM
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Originally Posted by wildta
I was going to say $1800 seemed cheap. There are a few threads around with this on other models. I wouldn't say it's a common issue from reading the forum.

I remember one person saying it happened while parked in his garage so there was no way something hit it.
https://www.consumerreports.org/car-...nger-overhead/
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Old 04-12-2024, 08:50 AM
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I want an exploding sunroof.....



Old 04-12-2024, 09:04 AM
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Very interesting. I wonder how Mercedes makes their Glass Vario Roofs for the SL. Maybe that's why they are so expensive to replace.
Old 04-12-2024, 09:32 AM
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Thanks.

I found this article stating the companies that use laminated sunroof glass. It's disappointing that Mercedes doesn't laminate their panoramic glass with the acoustic package.
Old 04-12-2024, 11:00 AM
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Originally Posted by wildta
Thanks.

I found this article stating the companies that use laminated sunroof glass. It's disappointing that Mercedes doesn't laminate their panoramic glass with the acoustic package.
Actually, the other article made a brief mention that laminated glass runs the risk of a cave-in. Glass is heavy and a shattered laminated roof would be like throwing a heavy blanket over the driver (and other passengers). If the "blanket" obscures the driver's vision or the weight hampers movement, that could be more dangerous. Being showered with little chunks of glass would be startling, but I think would be less prone to restricting the driver's movement or vision. Maybe folks should just wear their favorite helmets when riding in a car with a closed sunroof.


Old 04-12-2024, 01:07 PM
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Originally Posted by JettaRed
Actually, the other article made a brief mention that laminated glass runs the risk of a cave-in. Glass is heavy and a shattered laminated roof would be like throwing a heavy blanket over the driver (and other passengers).
Having seen how difficult front windshields are during crash tests and rollovers to "fall out" of place after shattering (typically have to be ripped or cut out), I personally wouldn't be worried. If anything, I think it would be beneficial in reducing the chances of ejection vs tempered glass in the event of a rollover.

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