RepairPal Certified shops can diagnose and repair your 2003 Lincoln LS. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
Ford TSB 06-5-16 covers the procedure to cure a "squeak behing the steering wheel" in Thunderbirds and Lincoln LS models. I completed this TSB and my squeak is no longer present in my 2003 LS.