#5. 2012 Mercedes Benz SL Class – $1,179.80 per year
The 2012 Mercedes Benz SL Class has an estimated maintenance cost of $5,899 for five years, or $1,179.80 per year. It has a suggested retail price of between $103,650 and $140,440. This convertible has two engine options, namely a 5.5-liter V8 or a 6.2-liter V8 engine. It has a poor value rating with fuel economy of only 12 miles per gallon for city driving and 19 miles per gallon on highway driving.