Originally Posted by jaguarxjl

Some say yes and some say no to your question.
To be safe, I had a local shop change it and they used a battery saver.. you essentially plug it into the cigarette lighter, while you are swapping the batteries.
IF you want to do this yourself:
1. figure out how to disconnect the bulb in the trunk - it would drain the little "battery saver battery in about a few seconds.
2. use two lantern type 6 volt batteries in series, with the cigarette lighter socket adaptor and battery saver.. so that your trunk light will not drain it.. you might still get only a couple of minutes from these two lantern type batteries..

Originally Posted by Enosgl

You can easily connect a battery charger under the hood. The terminals are clearly illustrated in the owners manual. If I recall correctly, when you disconnect all power source, you will lose the windo auto up and down memory settings, as well as the moon roof auto open/close settings. I had this happen when disconnecting the battery to cause the EPB to go into calibration mode. Not a big deal, as the manual has instructions for re-programming the windows and moonroof. Easy-peasy.