There is a different chip installed but it is only needed when using EU spec VW or Audi Sat Nav Head Units.
But this chip is not needed when using Kenwood or standard (non sat nav) VW & Audi Head Units.
The only difference that will effect you using a Kenwood is the (PSU) power supply to the USB Cradle.
Not sure of the power supply & plug type in Germany but if it is not the same as USA spec then you need to replace it this is £10 in the UK.