Hey all - picked up an 05 SL today. Want to make sure I get through everything before dealer warranty runs out. If I'm sitting in the car and its quiet... There's an annoying hiss / whistle coming from the dash. Blower fans off, speakers off, no CD spun up.
It sounds like a bearing or a terrible power supply... Or a failing hard drive. Seems to be more off to the right side of dash. Any ideas?