Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What was the final number for the winning manufacturer with Mercedes-benz, and a circuit of hockenheimring?

### Inputs:
table_name: table, columns: ['Round', 'Circuit', 'Date', 'Fastest lap', 'Winning driver', 'Winning team', 'Winning manufacturer']

### Response:
SELECT COUNT Round FROM table WHERE Winning manufacturer = mercedes-benz AND Circuit = hockenheimring