There is no coding needed for the E53 X5 (btw, you're posting in an E70 forum). I wouldn't bother with the charger either. Just make sure you get a great new battery and then properly charge it up with the charger. If I may I recommend the Exide Global Extreme L5/49-E108. 900 CCA 1080 CA 185 RC 14" x 6.875" x 7.4375" 40 FR 108 PR. It also has a 40 month warranty.

See also here: http://www.xoutpost.com/bmw-sav-foru...ions-list.html