Advice: Buying a 2021 C63 AMG S




there are no other CPO sedans out there right now that have what I want
there is a 2021 at a Toyota dealer in NC. It has a rentech badge. Dealer says it has a “state 1 RENNtech exhaust. What is that?. Here are photos
this has 15k miles and does have Drivers Assistance Package
Last edited by jsloan01; May 7, 2025 at 04:07 PM.




The thing to consider with tunes is that it voids the powertrain warranty. A tuned car can't be CPO'd, which is probably why it's at a Toyota dealership. Extended warranties would also not cover powertrain repairs on a tuned car. Many folks who tune their cars will flash it back to stock before bringing it in for potential warranty work, but once it's discovered that the car is tuned it will be on the car's record. The other thing with tunes is that it taps into reserves that manufacturers build into their design to ensure reliability and longevity. There's no free lunch. A tuned car will likely not be as reliable in the long run as a stock car. It's just how it goes. Operating the powertrain out of the factory spec will ultimately shorten its lifespan.
there are no other CPO sedans out there right now that have what I want
there is a 2021 at a Toyota dealer in NC. It has a rentech badge. Dealer says it has a “state 1 RENNtech exhaust. What is that?. Here are photos
this has 15k miles and does have Drivers Assistance Package




The Best of Mercedes & AMG




To be honest, I personally would stay away from the pandemic years cars. Some of them are missing stuff due to parts shortages at the time such as the chip shortage and the quality has suffered as MB was forced to find alternate suppliers and the factories were short staffed.
Last edited by superswiss; May 7, 2025 at 05:01 PM.




To be honest, I personally would stay away from the pandemic years cars. Some of them are missing stuff due to parts shortages at the time such as the chip shortage and the quality has suffered as MB was forced to find alternate suppliers and the factories were short staffed.
This vehicle in Cleveland has had its decals removed, which I think was the right move. Those looked tacky as hell (in my opinion)








http://atcm.co/S2PVDP/2C8D312B.




This vehicle in Cleveland has had its decals removed, which I think was the right move. Those looked tacky as hell (in my opinion)




http://atcm.co/S2PVDP/2C8D312B.




1) drivers assistance package - an absolute must have imo. I live in LA and rarely use it for its autonomous features, but when I do it’s a huge pleasure and convenience. The value I see every time I drive are the safety features that prevent the car from getting into accidents (your blunder or not) which comes with the package. Besides its utility for the driver, the package significantly modernizes the car and resale value is that much better. When I was shopping cars without the package and brought it up, every salesman’s face showed weakness. They know people want the package and you definitely can leverage concessions if the car is without it. Basically a loaded c63 is future proof.
2) don’t fall in love too much with CPO status. Dealers have to pay Mercedes thousands to CPO the car. Basically CPO means if a car has a clean history and is not cosmetically beat, the dealer will take the risk and make the investment to CPO the car so they can sell it for much more. They also get the returns on when you do come in for warranty work, they can sell you on wear and tear items so they create a higher LTV from you as a customer. Mercedes takes the risk of paying for warranty repairs, but that is offset on the money they made from the dealer as well as the event that nothing goes wrong. Though I’ll say the marketing behind the CPO is strong. Whether it’s superficial or not, it effectively creates “peace of mind” which alone can make a buyer buy despite any other shortcoming, like a missing option, and especially on cars like amgs where forums are littered with fear and problems lol.
3) known concerns - law of attraction. Talk about and look for problems and you’ll certainly find them. Enjoy your car and life in good health my brother!




more than I want to spend but it’s CPO and ray catena is a reputable dealer in the nyc tri state area. I do hate the decals, however
there are no other CPO sedans out there right now that have what I want
there is a 2021 at a Toyota dealer in NC. It has a rentech badge. Dealer says it has a “state 1 RENNtech exhaust. What is that?. Here are photos
this has 15k miles and does have Drivers Assistance Package
Maybe forget the C63 and get a used GT63S.
Beautiful 4 doors with a coupe shape.
They’re getting pretty cheap nowadays.




There is something special about a W204 C 63 to me!
EDIT: meant w205
Last edited by jsloan01; May 7, 2025 at 11:38 PM.




Beautiful 4 doors with a coupe shape.
They’re getting pretty cheap nowadays.




What do you guys think? Perhaps I am being overly picky, but I am hunting for a well cared for car and this discovery deterred me. It’s also challenging to do this kind of diligence on a used car remotely
Last edited by jsloan01; May 8, 2025 at 01:02 PM.
do a PPI


