Daimler has just just announced pricing for the second generation B Class. The car comes with completely new 4-cylinder petrol and diesels units featuring direct fuel injection and turbocharging, new dual clutch and manual transmissions plus ten new assistance systems for the driver.
Starting with the engine range, the base model (the B180 BlueEFFICIENCY) will be offered with a 1.6-litre petrol rated at 122 HP (90 kW) while the second petrol model (the B200 BlueEFFICIENCY) will feature an identical engine in terms of capacity, but rated at 156 HP (115 kW). Both the B180 and B200 version 2012 Mercedes B Class come with a 6-speed mechanical gearbox, and their corresponding efficiency figures are 5.9 litres per 100 km (137 and 138 g
CO2/km respectively).
As for the diesel range the the 1.8-litre unit in the B180 CDI BLueEFFICIENCY produces 109 HP (80 kW) and requires 4.4-litres of fuel per 100 Km (114 g/Km of CO2) while the same cappacity engine in the B200 CDI BlueEFFICIENCY delivers 136 HP (100 kW), has the same consumption as the B180 CDI, and emits 115 g/Km of CO2.   
All these engines mentioned above can be paired with the automaker’s new 7G-DCT dual clutch transmission for an additonal 2,165 Euros. This transmission is extremely good at adapting to engine speeds and has Start Stop capability due to its electric oil pump.
The 2012 Mercedes B Class price starts at 26.001 Euro for the B180 BlueEFFICIENCY and reaches 29,809 Euro for the B200 CDI BE. The B200 BE carries a price tag of 27,935 Euro, while the B180 CDI BE costs 27,578 Euro.
Some of the safety systems that are offered as standard on the 2012 Mercedes B Class include COLLISION
PREVENTION ASSIST and ATTENTION ASSIST, while the car can also be equipped with the PRE-SAFE® preventive occupant protection
system  for an additional 392.70 euros. 

Source: Mercedes