True - the new fancy electrickery could be a problem. But if one manages to find a diesel vehicle with a mechanic fuel injection and a stick shift, it is very well possible to push start it: one sits in the drivers seat, ignition switch ON, clutch depressed and first gear selected. Everyone else pushes; at maximum speed the pushing crew lets the car go (to avoid injury) while the driver lets the clutch jump to closed (abruptly!). On my gliding field, this was standard procedure in case of an empty battery. Might take more than one try though and ensuring that the fuel system is full (work the little hand pump until fuel comes out of the opened drain hole on the fuel filter assembly) beforehand may be smart as well.