I have an 05' 300c. About a year ago the drivers side main window control unit stopped being able to put down the drivers side front and passengers side front windows, but would still put down the back windows. After countless hours of checking fuses and each wire inside the door with my tester I came to the conclusion the module was bad. I replaced the module with one from a U-pull it center.... SAME PROBLEM....so I thought okay maybe there is the slight possibility the car it was pulled from had the same problems although very unlikely, but still possible. I ordered a brand new module from the dealer and wouldnt you know...SAME PROBLEM!! Im at my whits end here....any thoughts or suggestions or should I suck it up and take it to a dealer?