The Mercedes-Benz B-Class measures 4,393 mm in length, 1,786 mm in width, 1,557 mm in height and has a wheelbase of 2,699 mm. The kerb weight of the crossover is 1,425 kg for the petrol variants and 1,577 kg for the diesel variants. The fuel tank capacity on both engine options is 50 litres with six litres of reserve. The B-Class has 16 inch alloy wheels with a 205/55 section tyre on all variants.
The Mercedes-Benz B-Class is offered with an all black interior theme with silver accents on the AC vents and other switches mounted on the centre console. The infotainment system can be operated through the dial present on the centre console and it supports Apple CarPlay and Android Auto. The steering has multifunction buttons for phone, audio and voice recognition as well. The front seat height is 1,047 mm while the rear seat height is 985 mm.
The Mercedes-Benz B-Class is powered by a 1,595 cc petrol engine and a 2,143 cc diesel engine. The petrol engine generates 120 hp of power at 5,000 rpm and 200 Nm of torque from 1,250 rpm to 4,000 rpm. The diesel engine produces 134 hp of power from 3,600 rpm to 4,400 rpm and 300 Nm of torque between 1,600 rpm and 3,000 rpm. Both engines are inline four cylinder units.
The Mercedes-Benz B-Class is offered with a 7 speed 7G-DCT dual clutch transmission for both engine options. The rated top speed of the petrol variants is 200 kmph and the rated top speed of the diesel versions is 210 kmph.
The claimed mileage of the Mercedes-Benz B-Class is 14.8 kmpl while the diesel has a rated fuel efficiency of 16.8 kmpl. These figures are acceptable for its class.