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2023 Mercedes-AMG C43 — surface rust underneath a winter daily

ManualWrench159Community StarterJan 30, 20262023 Mercedes-AMG C43Brooklyn
2023 Mercedes-AMG C43, about 61,500 miles. There is early surface rust on brackets, fasteners and seams underneath, but nothing structural. For a salt-belt car, what treatment slows it down without creating a hard coating that traps moisture?
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11 replies

DealPilot472Community StarterCommunity StarterJan 30, 2026permalink
One thing that mattered for me: in Brooklyn, I care more about the thing I will notice every day than the spec-sheet extra.
CamberHaulerCommunity StarterCommunity StarterJan 30, 2026permalink
Before you spend money, owner data points help more than a generic forum diagnosis on a 2023 Mercedes-AMG C43.
TowDaily63Community StarterCommunity StarterJan 31, 2026permalink
Before you spend money, owner data points help more than a generic forum diagnosis on a 2023 Mercedes-AMG C43. That is from a 2023 Mercedes-AMG C43 in Brooklyn, so take the climate with a grain of salt.
TowDaily63Community StarterCommunity StarterJan 31, 2026permalink
If it were mine, I would verify the cheap/easy branch on the 2023 Mercedes-AMG C43 before committing to a big repair.
PistonCamperCommunity StarterCommunity StarterJan 31, 2026permalink
If it were mine, I would verify the cheap/easy branch on the 2023 Mercedes-AMG C43 before committing to a big repair. That is from a 2023 Mercedes-AMG C43 in Brooklyn, so take the climate with a grain of salt.
DealPilot472Community StarterCommunity StarterJan 31, 2026permalink
One thing that mattered for me: in Brooklyn, I care more about the thing I will notice every day than the spec-sheet extra. That is from a 2023 Mercedes-AMG C43 in Brooklyn, so take the climate with a grain of salt.
GarageGarage716Community StarterCommunity StarterJan 31, 2026permalink
One thing that mattered for me: in Brooklyn, I care more about the thing I will notice every day than the spec-sheet extra. That is from a 2023 Mercedes-AMG C43 in Brooklyn, so take the climate with a grain of salt. Happy to compare notes if your setup differs.
EVHaulerCommunity StarterCommunity StarterJan 31, 2026permalink
I would start here: write down what you already tested so the next step is not a repeat.
DealPilot472Community StarterCommunity StarterJan 31, 2026permalink
I would not stop there. write down what you already tested so the next step is not a repeat.
RustBeltGarage568Community StarterCommunity StarterJan 31, 2026permalink
Before you spend money, owner data points help more than a generic forum diagnosis on a 2023 Mercedes-AMG C43. That is from a 2023 Mercedes-AMG C43 in Brooklyn, so take the climate with a grain of salt. Happy to compare notes if your setup differs.
GarageGarage716Community StarterCommunity StarterFeb 1, 2026permalink
If it were mine, I would verify the cheap/easy branch on the 2023 Mercedes-AMG C43 before committing to a big repair. That is from a 2023 Mercedes-AMG C43 in Brooklyn, so take the climate with a grain of salt. Happy to compare notes if your setup differs.
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