2013 C180 W204 Coupe. First registered Sept 2014 26000Km. Air Con takes 2 - 3Km to blow cool air after sitting in a sunny day of say 24C. Blows really hot air for this distance which takes 2 - 3 minutes. Dealer seems to think this is OK but on talking to other MB owners seems to be too slow. What will it take on a 35C day?
Comments appreciated.

 

2-3 minutes in a 24C day is wayyyyy too long. As a start, check the refrigerant pressure and quantity and the oil quantity in the compressor. I recommend taking it to a shop where they'll connect the proper machine that will measure pressure and quantities and perform the needed service.