I'm a new owner of a 2006 cooper S. Every time I turn the car off, I hear 5 beeps. What the heck do they mean?!?!?!?! I looked through the manual, but couldn't find an answer.

 

Likely thats the freeze/ice warning.
The temp is likely below 38 degrees
The Temp should flash on the tach

 

No it's not the temperature warning as it only happens AFTER I turn the car off and it also happens when it is warm outside. I've pretty much decided it's coming from the after market Pioneer Radio that the previous owner installed.