i have a 2002 year BMW 735I. The wipers have suddenly stopped working and i got a warning sign about the gearbox and park brake. also the buttons on the steering colum dont work. Eg radio volume not working and also the indictaors and full beam lights owill not stay on unless held. Ok im pretty sure its an electrical fault probably sensors, fuses etc. anybody out their got any guidance or advise (and no i dont wast to junk the motor) its low milage and i still owe a shed load of finance on it. thanks