Setting code for clock, avg/mph, etc. on "87 BMW 325 ES

Does anyone know how I can set the clock, etc. to stay on, and every time I start my car, I have to input the radio code, how do I make it stay?

That would really be a pain in the ass I can't offer any assistance call a dealership and ask if it's a simple fix or not. Good Luck

something is hooked up wrong and you are loosing power when you turn off the car.. it might be hard to find.. I would pull out the redio and check the wires back there first...