Mild Hybrid technology adds hybrid functions to conventional TDI engines. A belt-starter alternator (BSA) and additional lithium-ion battery reduce fuel consumption/CO2 emissions by increasing recuperation and switching off the combustion engine for trips at les than 99mph (emission-free coasting, only in conjunction with automatic transmission). Permanent connection of the BSG to the combustion engine ensures the engine starts comfortably and with low vibration. Start/stop mode can be used up to a speed of 9mph for TDI engines with automatic transmission. The engine electronics with automatic transmission link together various electronic systems, such as sensors for traffic ahead and navigation data, for coasting to suit the driving situation.