My 996 2001 needs the parking brake on.
Another parked way to raise lower the top is via the door key. Just turn and hold for a few seconds and then the noisy process starts
.
I need to locate where to lube the mechanism.
On another note. As a newby I thought my key needed to programmed to open the front trunk. But I found out you just have to press and hold the key fob trunk button for a few seconds.