The 2010 BMW 135 is available as a 2-door, 4-seat coupe. Starting at $36,050, the 2010 BMW 135 Coupe is powered by a 3.0L , 6 -cylinder engine mated to a manual transmission that returns an EPA estimated 18-mpg in the city and 25-mpg on the highway. The top of the line 2010BMW135Convertible , priced at $ 40,350 , is powered by a 3.0L , 6 - cylinder engine mated to a manual transmission that returns an EPA estimated 17-mpg in the city and 26-mpg on the highway.