Hi, i'm new to the Mercedes forum as this is my first one. If you don't mind I have a couple of questions. Firstly the car has failed its mot on parking brake, now during mot readings were poor then cable snapped! (pedal goes to floor with no resistance) Now my question is this. Is cable change a pain? I was going to do them all then check shoes and mechanism. Is there a diagram anywhere of system as Haynes don't do a manual. I've read that on some Mercedes models cables are located partly inside vehicle?