The high beams are automatic units which can be turned off in the menus. The parking brake is electronic and turns off automatically when driving, you shouldn't have to press anything
I think a lot of that is to do with the engine. Ive recently driven the C300, petrol turbo. Didn't seem to suffer from much turbo lag
I think some of the issue is with driving a hybrid for a while, the ability to drive a normal automatic is impaired. For example in my son's C class I can change gears by modulating throttle pressure. Worth remembering these gearboxes are "smart" too so if you drive it like you stole it, it'll hold lower gears than previously