I just had my battery replaced and the cars been running fine. I just went out to go to school (First day and I am missing it) I put the key in, everything comes on as normal when I start turning then key them there was a click and no power at all. It's like there is no battery. Since there is no power I can't open the trunk to look at the fuses. Any ideas?

Put your key in the trunk lock and turn it to the left. The trunk will open. I assume as stated in your user name that you drive an E39 540. This happened to me once and the problem was that the battery cable wasnt tightened down enough and came loose. Check it out.

nick

yeah check your battery cable - mine came loose all of a sudden about a month ago and I suddenly had absolutely no power to the car. Very weird - but given enough time and vibration, that thing will work loose.