Owner's manual for fifth generation BMW 7 Series (F01). To put the BMW 730d's competitive advantage in context this luxurious vehicle records near identical fuel consumption and CO2 emissions to the Mercedes C320CDi - a car that is two market segments below the BMW 7-Series and is smaller and lighter than the BMW. The impressive performance of the 730d is, in part, possible due to third-generation common-rail direct injection incorporating piezo injectors that operates at a peak pressure of 1,800 bar. This system ensures a near perfect combustion process. Weighing 185kgs the new six-cylinder diesel engine is also 5kgs lighter than its predecessor.