I'm not familiar with the policies in Norway or Germany. I would recommend that you contact Festool Germany for an answer to that question. You can reach them on festool.com (international site) or if you read German on festool.de.
As Shane mentioned the TS 55 RQ-PLUS will have no electronic protection or brake, it's not interesting at all especially for the TS55 and almost nobody has these in stock any way!
And your local dealer is obliged to offer you service, he probably won't be happy with you buying elsewhere but that is another affair.
My local dealer will take tools under warranty for service if you purchased them there, that is for all the power tool brands except Festool where he would get in trouble if he refused.
In some countries you can even buy TS 55 EBQ with same specs as REBQ with only difference that REBQ is new model since april 2012.
As far as I know EBQ is also 240V for European market.