2018 S63 AMG Issues
This weekend , experienced when driving the car would shake like crazy when gasing and very rough starts. Alot of gas smells when starting up. So I decided to drop off the car this morning at the closeby indy shop for quick inspection and this is what came back. Now to see what can be fixed.
3 spark plugs being replaced
2 ignition coils be replaced
After that will test it out some more..
Last edited by Hedges; May 12, 2021 at 10:17 AM.
I just realized that you are in TO, so a US Fed law isn't going to help......... Did you get the issue resolved? If is the exhaust ( which I really doubt) does this mean that you can expect to deal with this on an ongoing basis? I hope not for your sake.
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Exhaust shouldn't do the misfire and if they say yes it does, ask them if the mechanic can explain how it would?
SA called me and explained they will warranty the parts and fixing it - they wanted to make sure I do NOT have any boost in the car before they download information off the computer which will void that warranty.
Finally it was warrantied and the following
1) replaced Ignition coil
2) replaced Spark plugs
3) Reman injector with nozzle
4) TS spring injector
5) TS oil filter
6) screw plug
7) Check Compressions
After all said and done it was replaced - they found out it was still having issues.
They suspect its the fuel injector and fuel kit and have that replaced which got the car running again. After getting the car back all was fine but few days after i noticed sometimes when starting the car the idle would be low and car would shake - than the RPM would jump up very high and back down again on random starts.
Yesterday when car is in Drive and stopped at the light or traffic for whatever reason - the car would just simply die. I'd put back to Park and restart the car which made it very dangerous to drive. When driving pass 60 the whole car would shake and rumble again.
Enough of it - sent back to dealership yesterday AGAIN so will see what the further analysis is.
Had a CLS63 AMG prior to this and it was giving me same problem after 4 years or so - i am starting to get my doubts with AMG's after several cars with the same issue. I am starting to get a sense of how unreliable AMG cars can be .
Last edited by Hedges; May 27, 2021 at 12:34 PM.
Lets hope this is the last of it!
Got my car today and so far it runs fine!




Last edited by absent; Jun 3, 2021 at 08:00 AM.
4th time fixing this same damn issue... Car runs now but with check engine light will need to bring back to dealership again to fix...
4th time fixing this same damn issue... Car runs now but with check engine light will need to bring back to dealership again to fix...
I am sorry to hear this........I can't imagine the frustration you are experiencing. Does CA have lemon laws..........Mercedes Benz buyback, as this issue continues to plague your car and the dealer has not been able to fix it?
Lets see how this one goes... I may get rid of this car now and perhaps get a newer 2020 S63 or so instead or try out Porsche Panamera / Taycan Turbo etc.
This issue has been going on for waaay too long. I use highest grade fuel available at gas station if its 93 or 94 octane or sometimes 91 if its highest but nothing lower than that.
Lets see how this one goes... I may get rid of this car now and perhaps get a newer 2020 S63 or so instead or try out Porsche Panamera / Taycan Turbo etc.
This issue has been going on for waaay too long. I use highest grade fuel available at gas station if its 93 or 94 octane or sometimes 91 if its highest but nothing lower than that.




Hedges, sorry that you are dealing with these problems and how it keeps coming back especially on such an expensive car. We have something that is inferior to the lemon law in USA but it might still be useful in your case if all options were exhausted: https://www.camvap.ca/
Please tell your dealership to open a TIPS case immediately to escalate to MB Germany, you can also ask about it on the AMG Private Lounge and the forum admins might reply to you directly and escalate your issue for you directly. https://www.mercedes-amg.com/en/get-to-know-us.html






