On the 2024 GT63 S E Performance, bidders pressed the seller to confirm whether the car carried a Renntech tune, with the seller insisting the power came from factory tuning and that no changes were made beyond PPF and ceramic coating. The exchange surfaced uncertainty about whether an aftermarket tune could be removed and whether tuning affects the remaining Mercedes warranty. …
Factory tune versus Renntech, and warranty risk
Mercedes-Benz AMG GT 4-Door (X290) · ownership