Xr51105

Hi. I have a e280 cdi 4matic 2007 sedan.the problem that I have is that I got the fault message esp inoperative,run flat,hold and spedometru inoperative. I have checked the car at a MB dealer and it come out that the brake switch is broken. I have changed it with 4 used brake switch and one new brake switch but I still have the problem. I also got the fault message "can signal the brake signal from the control unit n10 / 2 is uplausibelt (controller sam with fuse box relay module rear). Can anyone hepl me with this?
Thank you.