Pre-heat the oven to 325°F; grease and flour a bundt pan thoroughly to prevent sticking.
In a large mixing bowl, cream the softened butter and sugar together until light and fluffy.
Add the eggs, one at a time, beating well after each addition.
Stir in the vanilla extract.
In a separate medium bowl, whisk together the flour, baking powder, and salt.
Gradually mix the dry ingredients into the butter mixture, alternating with the sour cream; begin and end with the dry ingredients.
Gently fold in the chopped German chocolate and toasted pecans until evenly distributed.
Pour the batter into the prepared bundt pan and smooth the top with a spatula.
Place the cake in the pre-heated and bake for 60 to 70 minutes, or until a toothpick inserted into the center comes out clean.
Remove from the oven; allow the cake to cool in the pan for 10 minutes, then invert onto a wire rack to cool completely.