I just bought a 2001 C240 and I am unable to consistently get heat on my delicate, if fussy female feet. Unfashionable, clod-hopper shoes just to keep warm in the car is just not an option. I've tried shutting all other vents manually. The Air direction **** is turned to the down arrow. Once in a great while I will get some tootsie heat when the "Auto" function is on, but generally it is just frigid in the foot zone. In fact, I have the reverse problem with the air-conditioning. I have never been consistently able to shut it off my feet in the summer. Help!