i guessits gotta be the fuse then because i know for sure the motor and rails are good. i am pretty good with the regulator andmotors as at some point the rail that the window sits on totally ripped the gears out. i had to tap out new holes and install a bolt where ther was a pop rivet holding the gear to the assembly. anyway they both Rf and LR go out together if that is the way MB splits them up then that makes sense. the fuse looked OK so i assumed they are good but i have been wrong about thet before. thanks for all the input guys. i will post the final result.