RE: radio not working after performing engine work
In the fuse panel at the left end of the instrument panel you will find one strange looking fuse in the middle of the panel. It has "wings" on it. Those are there to make it easy to pull out. This fuse supplies power to the things that have to work without the key including the interior lights, electric door locks and radio (clock). Pull that fuse out forone minute with the key out of the car. This will kill all power to the radio and may reset its little brain, kind of like re-starting your computer. At least it will stop the blinking lights. If the radio doesn't reset and work properly after that "treatment" it may need to be replaced.
The fuse with the wings on it is sometimes called the IOD (ignition off draw) fuse. When they ship a new car, they slidethat fuse outso it won't run the battery down while in transit.
Engineer and current owner of two Sebrings.