Preheat oven to 350°F (175°C).

Sprinkle coconut and chopped pecans evenly in the bottom of a 9x13 inch baking pan.

Prepare German chocolate cake mix according to package directions.

Pour cake batter over the coconut and pecan mixture.

In a saucepan, combine margarine and cream cheese.

Heat until mixture is warm enough to stir in the powdered sugar, stirring constantly to avoid burning.

Spoon cream cheese mixture evenly over the top of the cake mix.

Bake for 30 minutes, or until a wooden skewer inserted into the center comes out clean.

Let cool slightly before inverting onto a serving platter.

Serve warm.