2005 C240 4matic - Dash display locks up intermittently or goes completely off. Sometimes it heals itself or removing and replacing the #25 fuse "corrects" the problem at least temporarily. Also the dash temp reads 50 t0 70 degrees despite outside temps in the 20's. Fuse replacement does not change the temp reading. Third, the passenger side butt warmer turns on when it feels like it. The fuse is fine and sometime removing & replacing the fuse corrects the problem but not always. Is there a master reset somewhere that can cure these ills?