Hello George,
The Fault code you are showing P2007.
normally 99% of the time is for fuel filter restriction and a new filter will sort this.

There is no pump in fuel tank for this vehicle.

Glow plugs are accessible when the top of the air intake ducting/manifold is removed. Torx bolts and 2 X 10mm hex bolts at rear of engine there is a support bracket.
I would warm up engine first to help aid removal of the glowplugs. Hopefully your diagnostic kit will tell you which glowplug is faulty.
If the glowplugs are not seized or already snapped off then its an easy enough job to do.
A couple of times the said faulty glowplug is ok then remove glowplug control unit and open it up you may find one of the tracks/pins inside has burnt out, this can be sorted with a soldering iron and a piece of wire to bridge the gap

HTH,
Ian