I have a 2001 300m. You have to remove the front passenger wheel. There should be a compartment with a few screws. REMOVE these screws and and screws securing battery(do this when u pop the hood) u might need an extension neck for a socket wrench to reach screws. Then just slide the battery out and replace. Reverse procedure to install. About 15 minutes changing time.
The battery on a 300M is in front of the passenger side tire, inside the fender.
autozone
Access the battery on the '99 300M through the passenger side front wheel well. Turn the steering wheel all the way to the right, remove the cover, remove the air filter and then you can access the battery.
The battery light stays on when the alternator is over or under charging.
top post battery with at least 600 cold cranking amps, Group 34 size
It is inside the passenger side fender, in front of the tire.
You need to multiply 300m by 100cm since there are 100cm in a meter. You should be able to solve that mentally.
No, they should still work.
This WEBSITE has the answers as well as pictures and a step by step: http://theswampbbs.com/300m/plugchange/default.html
With a scan tool, or unhook the battery for five minutes.
Oil change is due.
You have to jack car up on right side, take right front wheel off, take black plastic panel off that catches the dirt and pull battery out. The battery is located on the right hand side in the bumper, so that's how you get it out. Rick - ATL - rwilson0476@yahoo.com