so picking up a 2018 300s tomorrow. I want to put it on coilovers, from what I have read with the sport setting in these cars is that it stiffens up the suspension when put into this mode. so the question is if I swap out the stock struts/springs for a new coilover setup. am I going to be throwing codes, will this nock it out of sport mode what issues can I look forward too???

 

Putting it in Sport mode does nothing to the suspension. I'm pretty sure the S model has slightly stiffer shocks and anti-sway bars than the C. Drive it first for a while. I think my 18 S V8 rides a little stiff at slow speeds, but is perfect for highway speeds, for me.