If you open the drivers side door, there should be information on the side of the door that would touch the car frame one of the things it lists is tire pressure.
Yes.
No.
A Chrysler 300M uses ATF+4 transmission fluid.
1999 300m
5w30
It gets added through the low pressure service port. It is the smaller of the two ports.
10W3010W30
It has a belt.
5x114.3
You can find a wiring diagram for a 1999 Chrysler 300m in the vehicle's owner's manual. You can also find it at various auto parts stores.
Aluminum..
3,567 lbs. curb weight