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What's up is apparently a part that made it through in-line inspection that shouldn't have. :(

Case in point: My ordered 2011 Audi A5 leaked water into the cabin the very first rainfall post-delivery. And this despite the "monsoon test" you see at the assembly line end in all manufacturer factory videos. Some inspector wasn't doing their job!

Vendor parts usually undergo a sampling inspection and therefore not 100% inspected. However Benz-produced engines are at least supposed to be 100% cold tested (with compressed air) so certainly a bad head is atypical. Possibly a bad head gasket which led to valve damage?

Anyway, good to read you got it replaced/resolved under warranty and should be ok from this point on. :)
Just had a cylinder head replacement at 20,800 miles on my 2021 GLA 250. Whats up with this.

Steve Thomas
 

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Steve,
I’ve got you beat. Mine went in at 16,400 miles for a replacement. It’s the second one at this dealership. They gave me a loaner. Parts are in the states. Once everything arrives they say it will be a 2 week process. This is my first lease and I’m thrilled that I leased.
 

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I just joined this forum to echo this problem. Literally just returned from the dealer with a loaner and the cause is.... bad cylinder head. Car has 14k miles on it. Glad I leased, I'll never buy another german car. This was my first after many many hondas with zero issues.
 

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Same thing has just happened to me at 17600mi. I have burnt valve or seat in one cylinder. 2 weeks at least before I get it back. And here I thought I was buying a quality automobile for the first time in my life.

How do you guys(owners) feel going forward?
 

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What's up is apparently a part that made it through in-line inspection that shouldn't have. :(

Case in point: My ordered 2011 Audi A5 leaked water into the cabin the very first rainfall post-delivery. And this despite the "monsoon test" you see at the assembly line end in all manufacturer factory videos. Some inspector wasn't doing their job!

Vendor parts usually undergo a sampling inspection and therefore not 100% inspected. However Benz-produced engines are at least supposed to be 100% cold tested (with compressed air) so certainly a bad head is atypical. Possibly a bad head gasket which led to valve damage?

Anyway, good to read you got it replaced/resolved under warranty and should be ok from this point on. :)
Just got the same news about my 2020 MB GLB 4matic @22k miles. They said it will take 4-6 weeks to get the cylinder head from Germany. Glad they gave me a loaner, but with this mechanical fault and all the safety recalls, I have to say I don’t think I’ll be continuing with MB.
 

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We got rid of my wife's prior Caddy ATS due to incessant recalls (and poor headlights). They weren't major ones but so often that they gave us pause, not to mention the inconvenience of near constant returns to the dealership.

Not anywhere near as many recalls for her 2018 GLA which replaced it, but I do empathize. Uncharacteristically Benz dealers now openly cite that the the GLA is "entry level" so as to lower expectations. Flies in the face of "the best or nothing."

We've had very good experiences with both our AWD & FWD GLA's, but as Benz went to a bigger SUV form in the 2020+ evolution we too won't be returning to same. But hopefully that's many miles/years down the road.
Just got the same news about my 2020 MB GLB 4matic @22k miles. They said it will take 4-6 weeks to get the cylinder head from Germany. Glad they gave me a loaner, but with this mechanical fault and all the safety recalls, I have to say I don’t think I’ll be continuing with MB.
 

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Apparently it is a known issue. I just came back from the dealer today, my wife's 2021 GLA 4Matic with 20,000 miles has a bad cylinder head. it will take about a week to fix so they provided a loaner in the meantime.
Glad this is a lease, the wife was planning to keep it after the lease ends, but not anymore.
 

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Apparently it is a known issue. I just came back from the dealer today, my wife's 2021 GLA 4Matic with 20,000 miles has a bad cylinder head. it will take about a week to fix so they provided a loaner in the meantime.
Glad this is a lease, the wife was planning to keep it after the lease ends, but not anymore.
Thanks for sharing. I’m not going to buy mine either. It’s kind of like they leased us lemons.
 

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2020 GLA250 4MATIC Avantgarde Edition
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Sorry to hear about all the failures, but guys, come on… issues are common in all makes and models when a new version is released and I think you’re overreacting a bit. You should have known there was an increased risk of failures when you bought/leased the cars given that they’re first editions. If it happens again, then yes, I wouldn’t feel confident buying another one. But chances are that a recall will be issued or parts will be replaced under warranty. If it’s a known issue they’re likely to fix it in the model refresh or with a recall.
 

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hello! Chiming in - first MB; GLA250 and I have about 23K miles; my cylinder head and fuel injectors went out. Like others, I leased so I'm thankful. I inherently know the risks of buying a new model and I'm ok as I do not plan to purchase this vehicle once my lease is complete.
 

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Just got home from taking my 2021 GLA250 with 29k miles to the dealership in my loaner. Took it in for the check engine light coming on. Was told it was a bad cylinder head. Hopefully I'll get it back in a week or so. Luckily, warranty covered it.
 

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2020 GLA250 4MATIC Avantgarde Edition
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Same thing happened to me, i have a 2021 GLB 250 4MATIC, 20K miles cylinder head went bad. Unfortunately not a lease, wondering if we should trade it in while it hasnt blown up lol?
See what they’ll value it at, but tbh I wouldn’t bother trading right now. With this many failures, there’s bound to be a recall soon. If there is no recall towards the end of your warranty, then I’d say trade it in. That way you’ll get the most for your money already spent since depreciation will be hardest in the first 2 years.
 

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2020 GLA250 4MATIC Avantgarde Edition
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Meaning if they recall it, I have a guaranteed free fix every time it goes bad?
Yes, that’s correct. They can’t bill you for anything if a recall is put out. Additionally, the point of a recall is to replace the faulty parts with something that won’t fail, so they redesign parts or make them from more robust components to ensure longevity.
 

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Same thing has just happened to me at 17600mi. I have burnt valve or seat in one cylinder. 2 weeks at least before I get it back. And here I thought I was buying a quality automobile for the first time in my life.

How do you guys(owners) feel going forward?
Had the same thing happen to me at 26,500Kms- took a long time to diagnose this issue-Dealer has given me a loaner and apparently take 2-3 weeks to get fixed-
i thought it was a transmission problem as the car kept on taking a long time to shift…
Hopefully this replacement of cylinder will fix the issue…
 
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