Permanent Clock on the radio/please help

I have a 2003 330xi. Until recently the radio constantly displayed the clock, now it doesn't. I don't know what I did to change this but I would like to get it back. I tried to find it in the 2004 owners manual on BMW's website (which I assumed would be similar) and it said to refer to the radio's owner's manual, which I don't have. I also did a thread search on here but if its here I missed it. I know this is a simple, stupid question but I would sincerely appreciate if someone could tell me how to set this up. Thanks in advance,

You need the radio's owner manual. The Wiki (link at the top of the page) tells you were to find. And yes, it is a simple item to fix.

press the clock button on radio.................thats the one with a clock face on it