2Blindmice -- coach battery is on the left side of engine (when looking at it). On top of engine and behind a plethora of hoses and ducts. Hard to see and even harder to replace or check water.
Here is a link to show you the easiest (???) way to access the battery. Definitely an engineering "What were they thinking" moment.
http://www.thorforums.com/forums/f8/...ise-10915.html
And congads on the Axis and welcome to the forum.