Hi everyone. I recently sold my 02 C5. In 4 yrs I got thru 3 batteries. I was told these particular models were notorious for battery failure if the car sits for greater than a couple of weeks or so. It appears there is a considerable "parasitic drain" on the battery due to the fact that there are numerous electrical circuits that drain the battery when the car sits idle. I am considering purchasing a 05/06 C6. I would like to know if this model suffers from the same problem. Thanks.