C63, C43 AMG (W206) 2023 -

2026 C43 Design Flaw?

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Old Apr 11, 2026 | 08:51 AM
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2026 Mercedes AMG C43 Sedan
2026 C43 Design Flaw?

I'm a new Mercedes-Benz owner, having purchased my very first Mercedes-Benz... a 2026 AMG C43 - brand new, from the dealership, taking delivery of it at its age of 19 miles.


Two days ago while traveling on the interstate, a pickup truck in front of me swerved to avoid a small tire tread, but hit it with his rear wheel and sent the tire piece flying into the air. Though I was able to slow to avoid the tread hitting the body of my car, I didn't have any choice but to continue forward to allow the tire tread to drop back onto the pavement where I was able to center my own car to drive over it. Timing to the perfection, the tire tread piece hit the pavement just as I was crossing over and had bounced up to hit the bottom of my car.


I didn't think anything of it.


Approximately ten miles later, the Engine Coolant Low indicator had illuminated and I'd pulled over to take a look: The tire tread had hit the bottom of the cooling system, creating a pinhole leak.


First of all, I would like to know if Mercedes-Benz is cordial to "good faith" warranty - considering my car has less than 1000 miles?


I do realize that the issue and warranty is NOT of Mercedes-Benz material workmanship, however I do see a flaw in their design.


While the entire underbody is protected with panels, the cooling system components are quite exposed with little protection from the front, or bottom: Almost any road debris / road hazard could cause a puncture of the aluminum components, considering they're not protected, or encased.


Any words, or advice?


I don't have an appointment to be seen with the dealership until this upcoming Tuesday... which I had shook my head in disbelief, but had to accept.


Pictures available upon request, but the entire cooling system is exposed, vulnerable and capable to be damaged by regular road hazards and if the dealership declines a warranty claim, I wish to be prepared to inform and show the delinquency in Mercedes-Benz design.
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Old Apr 11, 2026 | 09:36 AM
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Yes, as this type of hazard is covered by insurance, not by warranty or "good faith".

Of course, if there are any design flows, those will be considered by MB or any safety authority and will be upgraded for free even outside the warranty or Insurance.
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Old Apr 11, 2026 | 10:18 AM
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2026 Mercedes AMG C43 Sedan
This is the underside of my 2026... the pictures show the entire underbody protected by panels, EXCEPT for the coolers.

Why would Mercedes-Benz have the entire underbody protected without any protection of the coolers?






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Old Apr 11, 2026 | 02:36 PM
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The coolers needs airflow to... cool. That is why they're not covered. You hit some debris on the freeway, sucks but not sure how it is Mercedes-Benz fault for any resulting damage. Contact your insurance provider to make a claim, the will be the ones responsible for repairs unless you pay out of pocket.

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Old Apr 12, 2026 | 02:29 PM
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2026 Mercedes AMG C43 Sedan
Originally Posted by Highline-Autos.com
The coolers needs airflow to... cool. That is why they're not covered. You hit some debris on the freeway, sucks but not sure how it is Mercedes-Benz fault for any resulting damage. Contact your insurance provider to make a claim, the will be the ones responsible for repairs unless you pay out of pocket.

Trenton O. Gibson
tgibson@highline-autos.com
Highline Autos
Direct: 602.909.9216
Office: 480.348.0777
As I had stated in my OP, "I do realize that the issue and warranty is NOT of Mercedes-Benz material workmanship, however I do see a flaw in their design."

Of course, Trenton, the coolers need airflow to... cool.

However, the coolers are COMPLETELY exposed without any protection of ANY kind.

It is a flaw in the design.

Multiple ways to accomplish airflow and protect the coolers from road debris and hazards.

The entire underbody is protected with panels, without any sort of protection for the coolers: NOTHING.

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Old Apr 13, 2026 | 05:00 PM
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W205 C43
f80 and g80 owners have BEEN dealing with this hehe.

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Old Apr 13, 2026 | 05:13 PM
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Originally Posted by SK10Under
f80 and g80 owners have BEEN dealing with this hehe.
I heard even g20 owners with the 340i had this issue with the cooling package optioned.
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