I've had no problems with the automatic heating/cooling system in my 1995 e320 cabriolet until the other day. All that I get now is hot air coming out. It is not blowing out, just coming out of the vents. The temp control does nothing, and the manual buttons for the blower do nothing. I can't find where the fuse is for the system. Is it some place other than the fuse box under the hood? Can anyone point me to some things I can check? Thanks in advance.