Sold mt 2006 LS and purchased this towncar to replace it. It is a 2007 Base L. Few issues i need any advice or help you can offer. 1 themostat stuck open is it easy to replace 2 cd player wont read cds. Is it hard to replace? 3 air bag light flashes 3 times 4 horn does not work. Radicontrols and cruise control work fine.. 5 red battery light comes on alot but battery and alternator tested fine. 6 rear air suspension drops over night. Hose under air filter leaking is it easy replace myself. 7 where can i find keypad code..