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Hi Brendan,

Good choices, all of those, if you're looking for a more affordable 3 Series alternative. The new-shape Mazda3 (the one that's only just been launched) seem to be especially excellent, and with Mazda's reliability you won't be spending too much on repairs or maintenance down the line. The Golf is always a safe bet too, although if you're used to the saloon shape it may be worth having a look at the little-seen Jetta - an underrated gem, that car. Or, alternatively, you could try the Audi A3 Saloon, which I reckon is the best compact sports saloon around at the moment.

See how you get on and let us know which one you go for.

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Hi Seamus,

A Mondeo 2.0 TDCi is, frankly, a great choice - spacious, comfy, well made and superb for that kind of long-haul journey. Just as a suggestion though, it may be worth coming down a class and having a look around, just as a way of potentially keeping your running costs as low as possible. Perhaps a Honda Civic diesel or a Skoda Octavia TDI? Both are massively spacious (so would carry your height with plenty of space behind for baby seats etc.), but would also be a little cheaper to run than the Mondeo, and almost as comfy on the long haul. Worth a thought, but if you fancy the Mondeo, go for it. Buy one with a full service history and you won't go wrong.

Let us know which way you go in the comments below.

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Hi Damien,

Right, did the dealer offer a warranty? If so, any faults should be covered. Even if they didn’t, you’re quite right — under consumer protection laws a product has to be ‘of merchantable quality’ and clearly that car isn’t. I’d ask for something in writing from the Audi dealer that inspected the car, setting out exactly what the fault is and then if the dealer still won’t play ball, get your solicitor on the case.

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Hi Francis,

Can I suggest then chopping it in for another Hyundai, this time an i40 Tourer? It's massively spacious so you won't (aside from the seat height) feel like you're trading down. It's also very comfy and, with your long-haul runs and high-ish mileage in mind, hugely economical. Drive the 1.7 115hp CRDi version gently and you should top 60mpg. 

If you don't fancy another Hyundai, then picking a similar estate from the Ford Mondeo, Opel Insignia, Volkswagen Passat or Peugeot 508 ranges should do the job just as well.

Let us know what you end up doing

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Hi Avril,

Yup, if you're doing big mileage, then the fuel-sipping nature of a diesel is exactly what you need. I'd suggest a 2008 Hyundai i30 or Kia cee'd 1.6 diesel. Both are in your price bracket (just about - you may need to haggle), both are massively reliable, spacious, comfy and nice to drive. Hard to go wrong with either so just buy the best one of either brand that you find.

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Hi Susan,

Well, strictly speaking the Santa Fe isn't an MPV, it's an SUV (I know; Captain Pedant strikes again...) and that does have a pretty unpleasant effect on its CO₂ rating. A 2008 2.2 CRDi diesel Santa Fe emits 190g/km of CO₂ - enough to land you with a €750 annual bill. That aside it's a very fine car, with reliability, looks and practicality all on its side.

If it's lower CO₂ you're looking for though, you may well have to consider an MPV. The Ford C-Max is only capable of taking three child seats once you get into the current model, and that may still be too pricey for you. Likewise, the Mazda5 needs to be a recent model if it's to have the current 1.6 diesel that brings with it lower tax bills. So, try and track down a 2009 Citroen C4 Picasso with the 1.6 HDi diesel and the EGS automatic gearbox. That has a 140g/km CO₂ emissions figure, so you'll just scrape into the top end of Band B with a €280 tax bill.

How does that sound?

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Hi Martina,

Both cars you've chosen there are pretty much neck and neck in every area, bar one. The Passat is arguably a little more 'premium' in its feel, the Mondeo is better to drive and we'd say a touch better looking (though obviously that's subjective!).

Both are impressively well built and have excellent reliability credentials. The area that separates them is quite simply fuel consumption. The Mondoe's 2.0 TDCi engine will be a bit more usefully grunty than that Passat's 105hp 1.6 TDI unit, but the Volkswagen's engine will prove to be a lot more economical. You should be able to average close to 60mpg in the Passat, which should be around 5-10mpg better than the Mondeo will manage. To illustrate it, we once managed to drive from Galway to Glasgow, back to Galway and up to Dublin on one tank in a Passat 1.6 TDI.

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Hi Mike,

Right, you need something cheap (obviously), rugged and that's not going to mug you for petrol money when you run it up the M6 to Dublin. I know, I was that soldier. 

So, you need to go Japanese and you need to go for something that's compact but still has the engine grunt not to get overwhelmed on the motorway. Simple answer is the Suzuki Baleno. They're a bit hard to track down now, but a mid-nineties one should fall into your price range. 

They use a solidly reliable 1.3-litre petrol engine that's good on fuel but which has the cojones for motorway work. And the car as a whole is as close to indestructible as any car has actually physically come. An unsung cheap car hero.

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Hi Denis,

Yes, it seems to be a recurring problem on the 320i, but it may not be as serious as you think. If the source of the leak is the crank-case ventilator (CCV) then it can be a bit pricey to get fixed, and it's most definitely not a DIY job, as bits of the engine have to be removed and the whole assembly tilted to allow access.

If though, the leak is coming from the vacuum pump then it's most likely simply a failed o-ring seal on the pump, which can be relatively easily replaced. The obvious signs of a leak are a smell of burning oil in the cabin at tickover and, of course, visible oil leaks within the engine bay. A quick steam-clean of the engine will show up easily where any leaks are coming from.

Of course, if you've not comfortable tackling this sort of thing yourself make sure you bring the car to a professional.

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Hi Joan,

We highly recommend the Hyundai i40 Tourer. It has a huge boot (though the Passat's is larger again) and is very comfortable. It's not easy to choose between the i40 and Passat at a fixed budget, so see what you can get for your money. The Hyundai, for instance, comes with a great five-year warranty from new and a high level of standard equipment. Its 1.7-litre diesel engine is also better than Volkswagen's 1.6-litre TDI equivalent, though the Volkswagen 2.0 TDI engine is better again if that's within reach.

Either way you're making a good choice and we'd recommend you test drive both cars to see which you like best.