I'm new here and I bought a 2013 1.3 Jazz last month. It's manual and I'm unsure how to put the heating on and defrost, I'm thinking ahead to cold weather. Heating is set at 28 degrees, do I turn it on by pressing the A/C button and setting it to dashboard vents? Also I believe that when defrosting it setting it to floor vents and recirculate would help, is that right?