2018 S63 AMG Issues
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From: Birmingham, AL
2019 S560, 2022 Audi S8
Will do! CLS63 had exact same problem (i bought new) and now the S63 giving me exact same problem! I previously had C63 and the E63 as daily. I am going for a daily driver cayenne coupe turbo and will be putting down a 911 992 GTS fun car.
Totally done with the AMG stuff.
Totally done with the AMG stuff.
I had a 2017 S63 and when it hit the 70,000 mile mark, I too had the problems you described twice in the same day. The first time it happened I was 50 miles away from where I live. Fortunately it happened for the second time only one mile away from my dealership so I limped it into the shop. They ran diagnostics and all they could find was that it had a misfire. I left from there and for the next 10,000 miles it never happened again. I know you guys will slam me for saying this but I had always put regular unleaded gas in it up the time of trouble (70K miles). I did fill the car up that morning when the event occurred and almost within 20 miles it stalled on me, got it to crank back up, drove back to my home area when it happened again, and I took it to the dealership. From that point on, I used supreme grade fuel and it never happened again.
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Joined: Oct 2012
Posts: 476
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From: Toronto
2018 S63 AMG S and 2018 GLS450
Did any of the mechanics think to totally drain the tank?
I had a 2017 S63 and when it hit the 70,000 mile mark, I too had the problems you described twice in the same day. The first time it happened I was 50 miles away from where I live. Fortunately it happened for the second time only one mile away from my dealership so I limped it into the shop. They ran diagnostics and all they could find was that it had a misfire. I left from there and for the next 10,000 miles it never happened again. I know you guys will slam me for saying this but I had always put regular unleaded gas in it up the time of trouble (70K miles). I did fill the car up that morning when the event occurred and almost within 20 miles it stalled on me, got it to crank back up, drove back to my home area when it happened again, and I took it to the dealership. From that point on, I used supreme grade fuel and it never happened again.
I had a 2017 S63 and when it hit the 70,000 mile mark, I too had the problems you described twice in the same day. The first time it happened I was 50 miles away from where I live. Fortunately it happened for the second time only one mile away from my dealership so I limped it into the shop. They ran diagnostics and all they could find was that it had a misfire. I left from there and for the next 10,000 miles it never happened again. I know you guys will slam me for saying this but I had always put regular unleaded gas in it up the time of trouble (70K miles). I did fill the car up that morning when the event occurred and almost within 20 miles it stalled on me, got it to crank back up, drove back to my home area when it happened again, and I took it to the dealership. From that point on, I used supreme grade fuel and it never happened again.
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Joined: Dec 2006
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From: Atlanta
W222 AMG S63
I'm inclined to think it's the gas, too. Especially, if @Hedges had similar issues with another car while using the same gas stations. This may also explain why the dealership doesn't catch the issue when the car was kept for an extended period...and also why it worked fine for a while when it was returned home. It still has the gas in it from the dealership.
Regarding the Porsche Cayenne Coupe that you are considering as a family ride for 3 kids (and I assume a spouse). They aren't that big inside and the boot is small. They all have the cockpit of midsized cars. All Cayennes and Touaregs have been like that from the beginning. The Q8 is larger, though. It's basically a long wheelbase Cayenne/Touareg. The Panamera can feel kinda tight at times. It's on the snug/sporty side.
I think only the Panamera wagon has seating in the center of the rear bench...so only spouse and 2 kids can ride.
The Audi S8 was on my short list for sporty family rides. It ticks almost all of the same boxes as the S63.
Regarding the Porsche Cayenne Coupe that you are considering as a family ride for 3 kids (and I assume a spouse). They aren't that big inside and the boot is small. They all have the cockpit of midsized cars. All Cayennes and Touaregs have been like that from the beginning. The Q8 is larger, though. It's basically a long wheelbase Cayenne/Touareg. The Panamera can feel kinda tight at times. It's on the snug/sporty side.
I think only the Panamera wagon has seating in the center of the rear bench...so only spouse and 2 kids can ride.
The Audi S8 was on my short list for sporty family rides. It ticks almost all of the same boxes as the S63.
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Joined: Dec 2006
Posts: 972
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From: Atlanta
W222 AMG S63
About gas, even if it's 91 octane...it could be sh*tty 91 octane. There have been reports of gas stations selling gas that has water in it, either due some issue with the underground reservoir (condensation or rainwater) or shenanigans.
Texas:
https://www.nbcdfw.com/news/nbc-5-re...storms/266308/
Indiana:
https://abc57.com/news/local-gas-sta...-in-fuel-pumps
Boston:
https://www.boston25news.com/news/25...ars/925444449/
Texas:
On Sunday, he said he stopped by the RaceTrac on 1550 S. Morgan Street in Granbury, off State Highway 144, and got premium gas for his Porsche. "I drove about three miles and the car started backfiring, stuttering, doing all kinds of crazy things," he said. "It barely ran."
Indiana:
“A couple miles down the road it started to spit and sputter. Barely made it home. As soon as I parked it died," said Gary Winthorpe who's car broke down after filling up his tank. Frustrated Winthrope decided to start working on the car himself hoping to find a cause for the failed engine. He later found a mixture of water and gas, but he wasn’t the only customer reporting engine issues.
Boston:
"We had 14 cars that didn’t want to work because water went into the gas tank," Belmont Car Care owner Steven Sarkis told Daniel. He says ice cracked a plastic cover on an underground storage tank at the Lexington Street gas station in Belmont, and rainwater seeped in days later.
Last edited by CQHall; Dec 19, 2021 at 01:09 AM.
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Joined: Oct 2012
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From: Toronto
2018 S63 AMG S and 2018 GLS450
I was contemplating why all the issues were happening on s63, cls63 and recently my dad's S560 as well. The only thing i can think of was using Petro Canada 91 gas that all our cars have used. I got my car back a month and a half back ago , I started to only use Shell 91 for my car now knock on wood nothing has happened. I am starting to believe it could be the gas well and more specific certain brand gas stations. Prevoiusly it would be almost exactly 1 month before the car started showing the same symptons but so far it's been over a month and all is fine.
In regards to the Porscye Cayenne Turbo , I am going to give it a try for few years. Dont intend on keeping it but to only just try something new for fun. I originally wanted to try to get a Gwagon to play or a Porsche Panamera however both have no allocations or have to wait too long or out of my price range on the second hand. My warranty is up for the s63 as of this month , so this is one reason i'm switching out given the many problems i've had so far. Wife has a gls450 so we can use that as a the family hauler if needed lol
In regards to the Porscye Cayenne Turbo , I am going to give it a try for few years. Dont intend on keeping it but to only just try something new for fun. I originally wanted to try to get a Gwagon to play or a Porsche Panamera however both have no allocations or have to wait too long or out of my price range on the second hand. My warranty is up for the s63 as of this month , so this is one reason i'm switching out given the many problems i've had so far. Wife has a gls450 so we can use that as a the family hauler if needed lol
Last edited by Hedges; Dec 19, 2021 at 08:15 AM.
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I was contemplating why all the issues were happening on s63, cls63 and recently my dad's S560 as well. The only thing i can think of was using Petro Canada 91 gas that all our cars have used. I got my car back a month and a half back ago , I started to only use Shell 91 for my car now knock on wood nothing has happened. I am starting to believe it could be the gas well and more specific certain brand gas stations. Prevoiusly it would be almost exactly 1 month before the car started showing the same symptons but so far it's been over a month and all is fine.
In regards to the Porscye Cayenne Turbo , I am going to give it a try for few years. Dont intend on keeping it but to only just try something new for fun. I originally wanted to try to get a Gwagon to play or a Porsche Panamera however both have no allocations or have to wait too long or out of my price range on the second hand. My warranty is up for the s63 as of this month , so this is one reason i'm switching out given the many problems i've had so far. Wife has a gls450 so we can use that as a the family hauler if needed lol
In regards to the Porscye Cayenne Turbo , I am going to give it a try for few years. Dont intend on keeping it but to only just try something new for fun. I originally wanted to try to get a Gwagon to play or a Porsche Panamera however both have no allocations or have to wait too long or out of my price range on the second hand. My warranty is up for the s63 as of this month , so this is one reason i'm switching out given the many problems i've had so far. Wife has a gls450 so we can use that as a the family hauler if needed lol
Super Member
Joined: Dec 2006
Posts: 972
Likes: 191
From: Atlanta
W222 AMG S63
I was contemplating why all the issues were happening on s63, cls63 and recently my dad's S560 as well. The only thing i can think of was using Petro Canada 91 gas that all our cars have used. I got my car back a month and a half back ago , I started to only use Shell 91 for my car now knock on wood nothing has happened. I am starting to believe it could be the gas well and more specific certain brand gas stations. Prevoiusly it would be almost exactly 1 month before the car started showing the same symptons but so far it's been over a month and all is fine.
...
Wife has a gls450 so we can use that as a the family hauler if needed lol
...
Wife has a gls450 so we can use that as a the family hauler if needed lol
The S63, CLS63 and S560 (essentially an AMG S63 Long Comfort) all have engines that are tuned to get the most out of the gas. I would venture to guess that these cars require at least 91 octane whereas other MB engines (like that in your wife's GLS450) can even run on "regular" 87 octane gas. Maybe her 3.0L turbo inline six engine can tolerate the bad gas. Even if they recommend "premium" MB (and other manufacturers) have to make their cars somewhat tolerant of bad gas if they want to sell their cars around the world. The AMG team probably expects really great gas for their engines, and tune the ECUs accordingly.
I've done ECU tuning on several of my cars and there is often a 92 or 93 Octane tune available that unlocks a few more HP...but if you select that 93 Octane ECU tune and don't give it at least 92 Octane, the engine starts to act up.
Here is an example of the tune in use:
And before any of you say, "My car isn't a Subaru!!". Your turbo AMG has a lot in common with a turbo Subaru when it comes to releasing horsepower. Basically, when you can't add more displacement, add boost via a supercharger (as in my W211 E55 AMG) or turbo charger(s).
All ECU tuning for AMG, M, S/RS, cars center around manipulating boost pressure.
Anywho...to bring it back home, you need clean high octane gas to get these cars to perform how you expect an AMG turbo V8 to perform.
Last edited by CQHall; Dec 19, 2021 at 11:55 AM.
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Senior Member
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From: Toronto
2018 S63 AMG S and 2018 GLS450
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For sure, previously we use up to 4-5 different Petro Canada stations whichever that is close by and we take advantage of the points card. However i've stopped using them and trying only Shell 91 now since i've goten back the car, it's been month and a half and so far no problems. Perhaps we can put this to rest with these stupid problems. Guess not all gas companies are the same despite fueling based on "91"
Here are other gas stations without ethanol: https://www.pure-gas.org/
Thread Starter
Senior Member
Joined: Oct 2012
Posts: 476
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From: Toronto
2018 S63 AMG S and 2018 GLS450
Ya stick with shell, petrocan has ethanol as well so....
Here are other gas stations without ethanol: https://www.pure-gas.org/
Here are other gas stations without ethanol: https://www.pure-gas.org/
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Ya, I used to use petrocan back in the days too because of petropoints but then CIBC decides to stop collaborating with petrocan so I tried something new (in this case shell 91) I realized how much happier my car feels after switching to shell 91 it accelerates smoother and it wasn't in my head (I tried many petrocan and shell within the GTA and all the time shell 91 feels like the engine runs smoother and the car pulls more) I am curious what refineries petrocan get their gas from but each petrocan indeed gets gas from different refineries.
Thread Starter
Senior Member
Joined: Oct 2012
Posts: 476
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From: Toronto
2018 S63 AMG S and 2018 GLS450
Ya, I used to use petrocan back in the days too because of petropoints but then CIBC decides to stop collaborating with petrocan so I tried something new (in this case shell 91) I realized how much happier my car feels after switching to shell 91 it accelerates smoother and it wasn't in my head (I tried many petrocan and shell within the GTA and all the time shell 91 feels like the engine runs smoother and the car pulls more) I am curious what refineries petrocan get their gas from but each petrocan indeed gets gas from different refineries.
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Good news to hear! Thank you for your update! Enjoy it : )
