actually all new cars have weaker a/c units than years ago. compressors are designed smaller, lighter and more efficent to get better mpg than cool. Yea they still cool okay, but no where near when we used freon.
Of all German cars I have recently owned (Cayenne/Boxster/c320)...The one and only thing that seems to be an issue is the AC....Maybe because in Germany they dont need the AC that much?? Anyway, they AC units dont seem to be very LINEAR ...I can never seem to get the air to blow directly where I need it to ...Anyway, the pros out-way the cons so I am HAPPY and wont own anything but German vehicles!
Here's a tip to improve airflow: close the rear air vents. If you have passengers in the rear seat complaining of lack of A/C or ability to open window tell em to shut their yaps. What are they gonna do? They have no oh shit handles to hold on to. You're in control.