It is not the amount of miles they do per year that is the problem but, How they do those miles. I don't use mine that often on long motorway journeys but, It will do a regen on the 30min drive into town.

I doubt you'll get them to fit a new DPF but, you could ask them to show you how saturated it is on a diagnostic scanner.

We have had 2 diesels fitted with DPF's. One did about 7,000 miles a year the other about 8,000. Neither had any DPF issues. But they did get used both in town and on A roads/motorways regularly.

Now we have 2 petrols, one turbo, one supercharged. The performance is better, the economy virtually the same and the purchase price about £2000 less.

No point buying diesels today unless you are doing a huge mileage.

My wife has one of the last of the old A classes and I had a B class - both with the 1.5 petrol. The engine is now older technology, but it is more than capable, despite only having about 90 bhp.

I did almost 50,000 trouble free miles with my B class with no signs it wouldn't have done at least that again. It used no oil between services.

Long time mpg on my B, which was used a lot around town, was 35mpg on a run it would do mid 40s and on one run I did get into the low 50s.