Purchased my 08 XLR (with 30K original mileage) last summer and drove it occasionally until parking it in the underground (without any issues) for the winter. Went to start it up a few days ago and absolutely dead. No dash lights, no clicking, no power anywhere and after reading a lot of forum comments I assumed it was a battery issue. I bought a new battery and fully charged it before swapping it out, also changed the battery in the FOB...still dead. I'm a newbee in the XLR world and would appreciate any advice that could be related regarding this issue.