coolant-workshop visit on 2006 Mercedes-Benz C230

I have a 2006 C230. Yesterday, while driving, I heard a squealing noise that sounded like one of the belts under the car hood. The air conditioner stopped blowing cold air & I got a msg. that references a coolant, visit-worksop. Does anyone know what this means?

Asked by for the 2006 Mercedes-Benz C230
Sounds like you need to see a shop to have them service your cooling system. Be sure to make sure that your Coolant Level is, you can check this by looking at the level in the Coolant reserve Tank. If it is empty and there is coolant leaking, TOW your car to the shop, so you don't damage your engine.