320i electrical issues

Hello I am a big fan of german cars. I have a BMW 320i in excellent condition only having electrical issues. My right taillight and my fuel and temp gauge went out. I found out the fuse blew so I put another one in and two block later that one blew too. I put another in and that was has not blown for a week or so. Now however the car only starts when it wants to. The battery is good. I will go out in the morning and it will not even turn over, then go out in the afternoon and it starts right up. If anyone has any ideas let me know. thanks

Check your battery connection.