I am thinking of acquiring a diesel E Class 7 seater estate- but am unsure whether to seek out a good M/N reg W124 example, or go for a newer say P or R reg model, budget dependent obviously. Any opinions/thoughts would be welcomed-my initial instinct would be the older car, but are the build quality criticisms of the newer type justified? Also, which diesel is generally best thought of, bearing in mind school run and local driving use plus odd weekend motorway journey? Thanks in advance.