Did I damage my engine?
Thread Starter
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Joined: Oct 2023
Posts: 4
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From: SF Bay Area
2017 c63s Sedan
Did I damage my engine?
Before I start, I no longer do any of this. I warm up my c63s properly (not letting it pass 3k rpm until all temps are white), never idle when its in park, I do oil changes every 5k miles, and all services, and maintenance preventatitily.
So I bought a w205 c63s about a year ago (at 26k miles, oil changes done every 5k on it previously), and didn’t know how to check the temps in the amg setting for about 3-4 weeks, so I went by the gauge on the dash under the rpm. Long story short, I did some pulls (around 6 max, potentially less) when the temps weren’t white, (idk what the actual temps were, definitely weren’t off cold). These pulls weren’t anything crazy, and the hardest one probably hit around 5-5.5k rpm and ~65mph. on top of this, I did cold revs 2-3 times (again I don’t recall the exact amount, and they were definitely not excessive, only a few pushes of the throttle, and with the soft limiter on). these took place during that 3-4 week period that I mentioned above, and were spaced apart decently. Also since that 3-4 week period I haven’t gone above 3k rpm while on blue temps, done cold revs, or anything remotely similar to the things I mentioned above.
It's been almost a year since then (nearing 10k miles/36k in total) and the car is still running like new. However, I'm still worried about the potential damage, or long term reliability issues that my stupidity caused. My local Mercedes service center said its fine because it wasn't done excessively, or over a long period of time, and that the m177 engine is built to handle stress. I still wanted to get others feedback on this though for potential pace of mind.
Appreciate the help in advance!
So I bought a w205 c63s about a year ago (at 26k miles, oil changes done every 5k on it previously), and didn’t know how to check the temps in the amg setting for about 3-4 weeks, so I went by the gauge on the dash under the rpm. Long story short, I did some pulls (around 6 max, potentially less) when the temps weren’t white, (idk what the actual temps were, definitely weren’t off cold). These pulls weren’t anything crazy, and the hardest one probably hit around 5-5.5k rpm and ~65mph. on top of this, I did cold revs 2-3 times (again I don’t recall the exact amount, and they were definitely not excessive, only a few pushes of the throttle, and with the soft limiter on). these took place during that 3-4 week period that I mentioned above, and were spaced apart decently. Also since that 3-4 week period I haven’t gone above 3k rpm while on blue temps, done cold revs, or anything remotely similar to the things I mentioned above.
It's been almost a year since then (nearing 10k miles/36k in total) and the car is still running like new. However, I'm still worried about the potential damage, or long term reliability issues that my stupidity caused. My local Mercedes service center said its fine because it wasn't done excessively, or over a long period of time, and that the m177 engine is built to handle stress. I still wanted to get others feedback on this though for potential pace of mind.
Appreciate the help in advance!
Last edited by Sypriz; Nov 3, 2023 at 09:16 PM.
Out Of Control!!
Joined: Nov 2018
Posts: 11,403
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From: San Francisco Bay Area
2019 C63CS
Is this one of those texts written with invisible ink that I have to hold over a candle before the writing appears? White font and white background doesn't work so well 
. Anyway, don't worry about it. Your engine is fine.
. Anyway, don't worry about it. Your engine is fine.
Thread Starter
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Joined: Oct 2023
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From: SF Bay Area
2017 c63s Sedan
OOPS! i have dark mode on LOL sorry about that, i'm new
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2007 E350
correct me if I'm wrong but amg tested the m177/m178 and run it for about 6 month without stopping to see if they can break the engine. Whatever they did they couldn't break it. Unless you're abusing it for a long period of time such as revving it cold until its up to temps, disregarding oil change when its time. I don't see how you can hurt it. m177/m178 are over engineered
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⏱️ 700HP Facelift converted C63 S Coupe with Drexler 3.06 plated LSD
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'91 964 Turbo, '02 E55's & '14 E63s-w
If it has ran well for a year and 10K miles, it's fine don't sweat over it. Many leased cars are sold every day and most of the times they are driven as if they were stolen and most still do well, so no big deal. Change fluids on time, be respectful to the car and you'd have many more years of enjoyable miles to drive
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11 E550, 16 AMG GTS, 13 S550
warm up isn't as huge of a deal as you think it is. Mercedes Benz oil pretty much makes it useable from cold start. You build all the oil pressure you need just starting it, don't overthink it.
I hang out in the drag racing crowd online, they'll pretty much start the car, do a two-step check and blast 1500hp through it and shut it off, the engine is not warm nor will it warm up from this due to the fuel choice (methanol atomizes cold, leaves condensation on the intake manifolds, burns colder than gas). Cold revving it is just mean but overall the health of the oil is more important than warming the car up properly.
I pretty much fire up the car and take off immediately and have for the last 10 years. I've seen all the bearings in my cars at some point out of morbid curiousity when I do an oil pan gasket and I got nothing bad to show for it. I'm also a Mercedes mechanic by trade and uh I've never seen a car that got destroyed by cold starts. Running it out of oil, or not changing the oil for 30k miles though absolutely.
I hang out in the drag racing crowd online, they'll pretty much start the car, do a two-step check and blast 1500hp through it and shut it off, the engine is not warm nor will it warm up from this due to the fuel choice (methanol atomizes cold, leaves condensation on the intake manifolds, burns colder than gas). Cold revving it is just mean but overall the health of the oil is more important than warming the car up properly.
I pretty much fire up the car and take off immediately and have for the last 10 years. I've seen all the bearings in my cars at some point out of morbid curiousity when I do an oil pan gasket and I got nothing bad to show for it. I'm also a Mercedes mechanic by trade and uh I've never seen a car that got destroyed by cold starts. Running it out of oil, or not changing the oil for 30k miles though absolutely.
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2025 Maserati Grecale Folgore and 2024 Jaguar F-PACE SVR
I think it's direct injection that changed the recommendation as it also cools the engine. The last DI vehicle I owned in winter in Colorado you HAD to drive it to get it to warm up on the coldest days. So I think how long it runs cold is more important, in terms of wear-and-tear, and driving actually helps the motor warm up faster.
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