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2018 Mercedes-AMG C63 — would a large MSRP cut make you wait before buying?

RoadTripEnthusiastCommunity StarterAug 22, 20262018 Mercedes-AMG C63 SLos Angeles
2018 Mercedes-AMG C63 S, about 45,500 miles. Price cuts and incentives are good for new buyers but can hit recent owners resale hard. How much do you consider potential manufacturer price moves when buying a newer EV or luxury car? I would rather test this logically than replace parts.
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11 replies

RoadTripEnthusiastCommunity StarterCommunity StarterAug 23, 2026permalink
Cleared nothing. I want service to see the alert on the 2018 Mercedes-AMG C63 first. Wrote this up on my lunch break.
TrailRoadieCommunity StarterCommunity StarterAug 23, 2026permalink
Not convinced that's the whole story. Try a second charger before blaming the 2018 Mercedes-AMG C63 — site sharing and pack temp change the curve a lot. Then you'll know the next fork. This is from a 2018 Mercedes-AMG C63 in Los Angeles with 45,500 miles. Stop there until you know. Trying not to diagnose from the couch.
RotorHunterCommunity StarterCommunity StarterAug 23, 2026permalink
I'd push back a little: Match starting SOC and battery temp if you're comparing 2018 Mercedes-AMG C63 charge sessions. I'd do that before spending real money. No need to make it theatrical. I'm in no rush to be a hero on it.
RotorHunterCommunity StarterCommunity StarterAug 23, 2026permalink
Quick add on that: On the 2018 Mercedes-AMG C63, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “amg c63 — would a large msrp,” that was the fork that mattered for me. This is from a 2018 Mercedes-AMG C63 in Los Angeles with 45,500 miles. That's the sequence I'd use. If your situation is the opposite, ignore me. I'd rather pay for diagnosis than a second guess-repair.
UsedCarGuy283Community StarterCommunity StarterAug 23, 2026permalink
Low-voltage gremlins will strand you even with a full pack. Try a second charger before blaming the 2018 Mercedes-AMG C63 — site sharing and pack temp change the curve a lot. Then you'll know the next fork. If it doesn't change the out-the-door or the repair estimate, it's noise. Heat soak after errands is the other window.
RoadBuilder189Community StarterCommunity StarterAug 23, 2026permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2018 Mercedes-AMG C63 charge sessions. Then you'll know the next fork. That's the whole play. Doing the boring step first on purpose.
RotorHunterCommunity StarterCommunity StarterAug 23, 2026permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2018 Mercedes-AMG C63 so service can see what you saw. Then you'll know the next fork. This is from a 2018 Mercedes-AMG C63 in Los Angeles with 45,500 miles. That's the sequence I'd use. I'm in no rush to be a hero on it.
UsedCarGuy283Community StarterCommunity StarterAug 23, 2026permalink
I'd treat 12V warnings as a no-ignore. On the 2018 Mercedes-AMG C63, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. Then you'll know the next fork. On “amg c63 — would a large msrp,” that was the fork that mattered for me. I'd want a dollar figure or a measured spec, not 'should be fine.' Only after sitting overnight so far.
RoadBuilder189Community StarterCommunity StarterAug 23, 2026permalink
Charge curves lie if you don't match starting SOC and temp. Match starting SOC and battery temp if you're comparing 2018 Mercedes-AMG C63 charge sessions. That's where I'd start. That's the whole play. Trying not to diagnose from the couch.
GarageDaily513Community StarterCommunity StarterAug 24, 2026permalink
Don't clear the alert just to make the screen pretty. Leave the alerts on the 2018 Mercedes-AMG C63 so service can see what you saw. I'd do that before spending real money. Learned this the expensive way on a previous car. I'd rather be boring and correct. I already checked the easy fluid levels.
UsedCarGuy283Community StarterCommunity StarterAug 24, 2026permalink
I'd treat 12V warnings as a no-ignore. On the 2018 Mercedes-AMG C63, I'd get the 12V/DC-DC side checked even if the traction pack looks fine. I'd do that before spending real money. On “amg c63 — would a large msrp,” that was the fork that mattered for me. I'd want a dollar figure or a measured spec, not 'should be fine.' Checking again after work.
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