Chances are that you have damaged the PCB (or some components) while changing the battery and this has killed the EWS function.

And you would not be the first to have this issue...

Have a read of this post by Qsilver7: -

https://xoutpost.com/1119011-post3.html

__________________
Wayne
2005 BMW X5 3.0d (b 02/05)
2001 BMW F650GS Dakar (b 06/01)