2006 Mercury Milan. When I start the vehicle the instrument panel flashes until the car is warmed up. No gauges work and sometimes doesnt want to shift. Everything else functions correctly. On hot days or when car has warmed up( usually 30 minutes or more) eveything functions correctly

SOURCE: 2007 mercury milan V6 Car wont start. Jumped it

Remove the lugs at the battery. Clean the posts and the lugs - then reconnect. Your battery won't charge (and the jumpers won't work) largely because of a film on the + post and lug. If you live in a hot summer area, (Arizona) the problem is especially troublesome.

SOURCE: When the temperatures drop below 30 degrees I

the most common fix is either the brake pedal switch is bad or out of adjustment. cars now days, you have to step on brake to start car, it is a safety feature so it can not start or go into gear if foot is not on brake. once the brake switch is locked, it will send current to the shift solinoid that releases the shift lock.usually its the brake switch ! have a good day !!

SOURCE: 2006 Mercury Milan 3.0L U0100 code

Is the battery good in it?