So, last nite at a show 'n' shine, I had my C8 HTC top down (engine off, car in park, frunk and trunk firmly closed) and tried every way I could think of using the remote to raise the tonneau to expose the oil dipstick. Nothing worked. According to the manual, and AI, "PRESS LOCK, THEN HOLD TOP BUTTON", which I did. Lights flash, but nothing else happened. So, raised the roof, tried again, tonneau lifted as it should. Does this mean you can't check the oil with the top down??