Thanks DT_ and Technic for your contributions.
Thanks also to bmster--I am sorry that your situation did not turn for the better, but it has helped a lot of us save time and money with that TCU route.
I am beginning to think Martin is a charlatan. :/
OP has been updated.
I am still looking into this btw. Are all voices in German for the ULF module? Does it announce incoming calls in German as well?