jlr

I am picking up a new to me 2019 S560 Coupe this week. I am considering a Renntech ECU tune. I have a few questions. First, although you can flash back to stock, does the dealer know the car has been flashed back. I do not want to void my CPO warranty. Second, I am having a hard time reading the Renntech website as far as gains. On an apples to apples comparison, how much HP and Torque is gained at the wheels over stock. Third, If the gains only kick in at higher rpms’s the tune will not be for me since I anticipate driving in comfort mode. I am having a hard time reading their graph. So, on the torque side, when does the real benefit kick in? Thanks.