A tip my Dad gave me for the cold/freezing mornings.... Dont know how it would work on a saloon version as Ive only had hatches or Estates......
Before you have brekkie put a fan heater in your car on low heat with 'stat set high, by the time you come out to drive off, all the frost or snow has gone and the car is nice n toasty.
Just make sure that the fan heater is not pointing at anything close like meltable head rests!!