The battery is accessible without removing the right front wheel and tire assembly..Remove the Air cleaner intake duct. Remove aircleaner lid and element. Remove plastic push pin from side mounting bracket.. Remove the air cleaner housing by gently lifting lower housing from rubber grommets holding housing in place. Remove battery splash shield. located at the front of the RT fender splash shield (approx 6 screws) ,Disconnect the heater blanket cord, if equipped. Remove the two short bolts from the battery hold down and remove the hold down. Disconnect the positive battery cable from the battery. Slide the battery toward rear of vehicle. Disconnect the negative battery cable from the battery. Remove battery from vehicle by lifting . .
REMOVING THE AIRFILTER BOX FROM A CHRYSLER 300M THE EASY WAY! You will need a 2 x 2 for this method. My 2 x 2 was about 3 feet long. I took a tiedown strap (kind you tether a motorcycle to a trailer) and slipped the loose end between the box and underneath the box part of the grommet mount (I removed the airfilter first); the strap will be in contact with the airfilter box. Bring the ends up and tie together with a good knot of your choice; I used a bowline hitch (you could use the ratched part of the tiedown strap instead of a knot). I left a sufficient loop to allow the 2 x 2 to pass through so that the 2 x 2 is about level. Pass the 2 x 2 through the loop and situate it so that one end rests on the motor. Now you have some leverage to pop the box loose from the pin. And it WILL come loose! Problem solved! So Simple!