Sunroof not opening?

Hi, I have the car listed above C class not AMG. The sunroof isn't opening and in California there's a big rainstorm right now so that's disastrous plus the warranty for the car just ended, so cha ching cha ching if I go to the dealership, lol. Can you please help? Please list possible suggestions, advice along with steps and pictures, thank you so much. I'm thinking the sunroof motor, but I do much about working on a Mercedes. Thanks again, you guys are very much appreciated.