Change of BMW320D pills

Hello everyone, I have some doubts, having if you can do a hand. I have been lit the witness of change of pills, I had thought to change them but now that the chivato is lit and I do not know what to do, I know that a cable must be replaced but I have no idea what cable it is, or if it is very complicated.

I've been looking at my car's workshop but I can't find anything. Could you tell me what kind or cable model do I need? And if it is very complicated to replace it?

Greetings and thanks.

On the left and rear right wheels they have a sensor on the brake pads, when the pills are spent the sensor on the disc and short. SOLUTION CHANGE PASTILLAS AND THE PASTILLA SENSOR OR UNIT THE TWO SENSOR CABLES. Let it be mild.

Thank you Barbasmec, I will try to have such, hear another doubt ... the ABS or the stability control can give me a c ... or to change the pills does not influence?.

C..O? O? I don't understand this. The afterion control works with the ABS and therefore with brake pads