Okay now i`m back from the United States, this is what happened:
The TV did support the PAL Wii.
The power supply Unit from the Wii also supported the 110 volt. (It does only say 240 volt on the power supply unit) I didn`t have to buy a voltage converter.
The Picture was nice on the TV but it was only in Black and white... I bought an PAL TO NTSC Converter and everything was Fine then.