Our is a MY 2011 3 with climate thus should be similar to your system in operation. We have found the system very easy to use and very good at keeping the interior at a satisfactory temperature without needing to adjust the temp setting. For example, during the heatwave in May we set off on a journey with an outside temp of 16 degrees and set the interior temp to 15.5 degrees as we normally do on a warm day with the A/C off, you don't need to cool the outside air if its already similar to the temp you want inside. When the outside temp warmed up we switched the A/C on and set the temp to 20 degrees, by the time we arrive home several hours later it was 28 degreees outside but we did not adjust the temp again, brilliant.
One piece of advice but this might not relate to yours since its a differnet model, do not use the auto button, its useless. All it does is decide where to blow the air and at what fan speed. I can decide that, if my feet are hot I cool my feet, if the head is hot I cool my head, if I need the air to flow faster I speed the fan up. How can the system know where I want the airflow, forget that garbage button and its a great system