I have a 2020 c63s with downpipes and an ecu tune no cpc. I never noticed until recently but when I go WOT the boost gauge shows it being 80%-90% and goes to 100% during shifts. I was wondering if this is normal or if I may have something wrong with the car? The car pulls hard and feels like it's tuned, the gauge just sits at like 90% ish. In the video I linked, my cars gauge is exactly like his at 4:10.