I am not sure of the part number for the TCU for EU, but the NA version would be:
TCU - Telematic Control Unit Module
Part number: K***-14G087-** or K***-14G229-**
You will need a new TCU antenna, and you will need to have a Vodaphone account (?) for the SIM service. That’s about all I know about swapping the TCU for EU. I am sure there is more info on this, and it probably can be done. I would look at the German Mustang forums, as they seem to have a good grasp on the imported Mustang mods and issues.