Ravenger said:To be honest, a low mileage diesel driven around town is likely to be in worse condition than one of equivalent age that's done a lot of motorway miles.
Modern diesels benefit from being worked hard. A mainly town driven car used for short trips may suffer from:
The DPF not regenerating properly.
The clutch could be more worn.
The suspension may have more wear from potholes.
The EGR valve may be more clogged up.