correct way of replacing a battery...
 

my 2002 X5 4.4 needs a new battery. can someone please advise how to replace battery (what to avoid/look out for) or forward me a recent blog in reference to replacing a battery. thanks

http://www.xoutpost.com/articles/x5/g...ernatives.html

I never have had any problems with the replacing (the problem is the draining!)

Motordavid did an excellent post (with pictures) => http://www.xoutpost.com/x5-e53-forum/...apped-out.html

From reading the above links, it seems like there is no 'resetting' required for things like windows and/or moonroof in X5's case.

I replaced my previous Mercedes's battery with Duralast from Autozone and was very happy with the replacement. After battery disconnect, a 'reset' needed to be done for all windows and moonroof, which basically meant rolling down the window, and continue to press the down button for an additional 5 seconds, rolling it up all the way, and keep pressing it up for an additional 5 seconds, repeat for all windows and moonroof too. Also, turn the wheel from all the way left to all the way right.

I know this is a BMW forum... I am just sharing this info so you know there may be some simple resetting needed if you change your battery and some things don't work right. From the above links, it doesn't seem to be though.

It's very straightforward with motordavid's writeup linked above, just have a 10mm and 13mm socket wrench handy... I suggest using an extension too. I replaced mine yesterday with a Bosch G49 from PepBoys for $99. It fit perfect and had the vent hole on the proper side already unlike the Werker he had to modify.

I didn't think accessing the battery was half as hard as some people made the chore out to be! All of the memory functions remained programmed aside from the OBC clock & parameters which were obviously reset.

Follow the write up if you need to..its easy as pie.