Seeking advice- 2 potential problems?

[RTC]

The official BMW rep in Poland should be able to help, there needs to be a dealership somewhere in Poland where they can take care of you. BMW also has so called "travelling engineers", one of them surely is in Poland and could take care of your problem. If you need to drive to Germany, drive to MUNICH BMW HQ but call them before you do that, so they can tell you where to drive to.
Even german dealers don't have US spec software but it is accessible to my knowledge.
I doubt that your US warranty is valid in Europe, unless you bought your car from the official diplomatic/NATO/US Military sales with that specific warranty.