Sometimes my 2010 has a coolant / antifreeze smell, but the coolant level has not gone down in 5,000 miles. The coolant level was slightly low when I purchased her, but after topping it off, hasn't been low since. I know this smell from previous vehicles that have had leaks. Any idea where to begin looking? Info: 2010 2.0L gas engine, only 47,000 miles.