Marc Ramsey wrote:

I may be wrong, but I think the Stemme V10 is legally not a TMG.

The type category "Touring Motor Glider" does not exist in the US.

I thought so. But the original poster lives in Germany, at least his
name and email address point in this direction. And as he wrote that he
would like to have the TMG rating, I think this question is of interest
to him.

Stefan