Snoe

After an oil change at a Benz dealership that was bought by Group One, I noticed a "winding sound" (like when winding a very tiny, old fashioned alarm clock). If it was already present and is normal for the car, I don't know, because when I first got it, I always had music or something playing in my car. But recently, I've been riding in silence, which is how I noticed.

Anyway, is this normal for a 2013 c205 Turbo?