Due to the vehicle's very low mileage, I would verify that the DPF and EGR have been serviced, and I would also make sure that it has recently had its oil changed. If you aren't planning on any of these things, I would have severe qualms about purchasing this car:
To avoid active regens of the DPF, you must have driven at least 10 000 miles with the most of those miles being lengthy travels (over 20 miles) and very few short excursions from cold. Alternatively, you must have driven well over 20 000 miles each year with the majority of those miles being longer journeys. This is particularly important if you are unable to continue driving until the active regen is finished.
