cla 1000

I had about enough of the stupid idiotic parking brake issue.
A while ago one of the parking brake cabels came out of its mountig thingy.
I did not have time for it so I left it like that.
My lovely whife drove the car last week and she called me that the parking brake alarm would not go off. Aparantly the brake got stocked pressed down. I tryed to lift the pedal but it was geting pulled back down. Not a lot, but just as much to trigger the parking brake alarm.
This week I took the right back wheel off the car, I took the disk off and somehow I mannaged to plug the cabel back to where it belongs. I put everything back and it worked just fine.
Until today when I aplied the brake again and it snaped out again.
I hate the stupid thing. It took me about 4 hours to fix it. Now what?
If you guys have any sugestions on how to adjust, tighten the cabels I would realy apreciate it.
Help