Later coil packs can give problems, normal coil problems would be engine management light on engine lacking power, may be stalling and sounding like a lumpy sewing machine (see picture). Test with spark tester, see misfire.
If the battery is going flat and the battery warning light is on, you may have a broken wire. Later Fords are fitted with ‘smart charge’ this is when the ECU (cars computer) can control the charging output of the alternator.
Check for bad connection on ‘smart charging’ alternator plug or broken wires (see picture), this may need replacement plug and sub loom, this is listed for the Ford Connect part no.1421293, but can be modified for other models.
Tip, if you remove the plug and the wiring is the fault, the alternator will use its internal regulator and start working again (battery light might still be on), see charging.
TDCI engines can start smoking (black smoke) and loose power due to EGR (Exhaust Gas Recalculation) valve sticking, try removing pipe or connector and then gently tap valve to get valve to close, you may need to leave disconnected until valve is replaced(see EGR page), this will leave Engine Management light on.
Later Ford's measure the temperature of the metal as opposed to the coolant, if the engine overheats the computer will shut down the engine to prevent damage, but if the sensors goes faulty (e.g. In the red) the car will not start or stop.
Later Diesels are fitted with DMF (Dual Mass Flywheels) flywheels.
These are two flywheels joined together by springs and dampers to smooth out vibration, however they wear and under load they distort, moving the flywheel away from or hit the CPS (Crankshaft Position Sensor) losing power and maybe cutting out, the vehicle will probably then restart as normal, a new and expensive flywheel is the only cure.