poor radio reception

[pellet]

Hello, I have just bought myself a 55plate w211 E320 estate, and I already have problems, my central locking doesn't work unless I am 2metres away from the drivers door, my radio reception is very very poor, my rear screen switch flashes for 10 seconds and then goes out, and my dashboard parktronic beeps 3 times when I touch the brake...help help help please!!!