112d ?? I'm guessing you either mean 118d or 120d.
The congestion charge rules in London are changing - Currently, hybrids don't have to pay congestion charge, but as of next year, its all going to be based on CO2. Cars emitting less than 120g/km of CO2 will be free in the congestion charge; whether they are hybrid or not. Cars emitting more than this will not be free - even if they are hybrid. This means the new 118d will be free! Thanks to BMW's Efficient Dynamics programme.
RWD car from a top marque free in the congestion charge zone - ftmfw
Rumour has it the 3-series range will get the same treatment, so the 318d will also be free in the congestion charge
