Hello again everyone!!!

I woke up this morning and I tried to start my X5 but the car was dead!
Nothing works in the car. No lights, no keys, no navi, nothing! The only thing I see is on the left side of the cluster, I see the oil indicator, and on the right side of the cluster I see the air bag light on. There is no clicking noise when I turn the key. Its seems there is no power running through the car. Can someone give me an idea of what this might be? I can use all the help I can get. This is a 01 X5, with 82k on it. Sport Package. The car was working just fine yesturday. Never had an issue with this car ever, only reg. maintainance. I do still have the ext. warrenty. Please help. Thanks....