I have had the same problems with my 2006 build Mondeo 2,0 TDCI, the first time after one year and 60.000km.

My exact problems:
-no current gas flow (either faster or slower)
-flashing glow-plug light (not listed in manual, but
flashing means emergency-run without turbo)
-at one time the car stopped at any reason and was not able to start again
Ford was not able to find the error in the system, so I had to wait three months for the repaired car.

Reason:
An extremly small leak at the exhaust pressure emition indication sensor!
This sensor is located (standing in front of your car) at the front-left-above side of the engine. A pipe from the exhaust manifold coming from behind the engine, is connected to it.
A thin
sealingplate between this pressure pipe and the sensor was done!
If the system measures the wrong pressure, the program will adjust some parameters, so the engine could stop without starting agin.
The same sealingplate is located at the other end of the pipe, so check also.
The system error log memory does not report this error.
Photo of the sensor:
JoJoThumb - AW281494
If your car doesn't start, just unplug the sensor (turbo will not work).
Do it not to often, I crashed my turbo using this method.