passinger side exterior mirror problem.I can adjust it left and right-all the time,somtimes up and down(sometimes not-ussualy after folding mirrors in,and then back out),inside mirror heater not working and auto dimming not working.. I'm getting the feeling it's just some bad contact or some wires pulled out(because ajustment sometimes work sometimes not)... any ideas how to fix this?? how hard is it to get to these connections and disassembling the exterior mirror? manu thanks!!!!2004 E270 cdi avantgarde