Right now I have 2005 toyota Camry and have my daughter who just turned 3 in back in the middle. I'm needing a bigger car that haul 6 people. I'm really wanting to stay with a car as they get better gas mileage. It wouldn't be used all that often just when I need to run other family members places. I'm thinking about a 1999 mercury sable sedan. My question is how safe would it be to put daughters carseat up front in sable? She is 3 feet tall and weighs 34 lbs. She would be in a convertible.