working. I've checked the fuse. ? I've checked the fuse and it's fine. Any suggestions?

My e-320 has the two front seats with heating pads. The plug-in cable under the seat sometimes comes unplugged. If one seat is warming, the fuse should be good for both seats. My e-320 has two switches on the console transmission panel that can be turned on or off, disabling one or both seat warmers.