Cooling SystemQuestionCommunity Starter

2023 Mercedes-AMG C43 4MATIC — a/C is cold while driving, warm at stoplights

CanyonWeekend30Community StarterMay 14, 20262023 Mercedes-AMG C43 4MATICConnecticut
2023 Mercedes-AMG C43 4MATIC, about 48,000 miles. A/C gets properly cold on the highway but becomes noticeably warmer at long lights. It cools down again almost immediately once the car is moving. Could this still be a refrigerant issue or does that point more toward airflow/fans?
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GarageNomadCommunity StarterCommunity StarterMay 15, 2026permalink
I wouldn't throw parts yet. If a shop can't duplicate it on the 2023 Mercedes-AMG C43, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. This is from a 2023 Mercedes-AMG C43 in Connecticut with 48,000 miles. Had a similar mess a couple years ago and that's what finally sorted it. If the story changes I'll post the new data.
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