I just installed the hitch on my 09 x5 and after I got an "increased battery discharge warning"

I'm nearly 100% certain everything is correct, the comfort access still works properly, and all there was, was the module which was connected right, the fuses which are all in the right places, and the 3 pin BUS connector which was connected right.

I'm wondering if this warning is just because I've been unplugging the battery, and running the radio while I was installing the physical hitch part and it drained battery, or if it is just because it hasn't been coded yet, or if something is somehow shorting? I drove around for 5 miles today and the warning didn't go away...

UPDATE: warning went away today finally so I think all is fine. Question about coding, some people on here say that you just need to get the code added, others say the whole computer needs to be reflashed? I asked my BMW dealer and they quote 2.5 hrs at 180/hr. Seems a little pricey to spend 450 to add this code when I probably could have got it installed for close to that? A independent shop can add the code for 100, but i'm wondering if that will be good enough and if I will still get the added zoom options etc.