I recently bought a 306 2000 model with AC. One strange thing is that the AC occasionally automatically switches on when i start the car. One thing i noticed is that this mostly happens when the car is parked in the sun and the temp in the car (as indicated by the thermometer on the dash board) is quite high. Since i do not have the user manual, does it say anything about this ? is it normal for the AC to switch on when the temp is high ?