Power/winter buttons have nothing to do with shocks... winter is to let the VX get going in 3d gear if you are on ice... power will change shifting points in gearbox (for better performance) also I've noticed slightly better gas milage with power on all the time. On my VX all shock were replaced but one front right which is still original. KYB is awesome but VX kills 'em fast... too intence wear because of short wheel base (yo-yo effect) and sports-like car prformance of VX calls for "intence" fun driving