Expert answer

Hi Ann,

Our writer Kyle Fortune drove the new ML 250 CDI so I've passed the question to him for answering. This is what he said:

"The base 250 CDI engine in the ML is actually a 2.1-litre turbodiesel mated to a seven-speed automatic to best make use of the engine's torque and power spread. It works relatively well too, so long as you remember you're shifting quite a lot of bulk without masses of power. That said it's got a sizeable 500Nm of torque generated low in the rev range, so the ML 250 CDI is rapid enough in town traffic. It's only out of town - on a motorway slip road when you push it - that you'll perhaps be a bit underwhelmed by the performance. It's all about expectations though, and really, it's a credible performer.

As to the BMW? It's difficult to comment on a car that doesn't exist, but experience of BMW's small capacity turbodiesels does suggest that they typically over deliver on expectations - the 520d for example feels very rapid given its size and weight. How that will translate to the bigger, weightier X5 is questionable, though BMW is unlikely to release a product that's not at the top of its game. We've not heard anything about a 2.5d X5 (officially or not), but it's quite possible given the prevailing economic climate and the ever tightening quest for economy. Downsizing is common so it stands to reason that BMW might be considering it for the X5."

Feel free to come back to us if you would like to know more.

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Hi Ashlene,

In the past the Toyota might have been the automatic choice, but Kia has come on leaps and bounds. Toyota still has the reputation for longevity and troublefree motoring, but Kia is catching up, and its seven-year warranty is real peace of mind for a new car buyer.

Looking at the price lists (of the five-door models - the best-sellers), the Rio is available as a 1.25 petrol model for €15,550 to €16,775 or a 1.4-litre diesel for €18,190. They are all in Band A for tax with emissions of less than 120g/km.

The Toyota Yaris can be had with 1.0- or 1.33-litre petrol engines and a 1.4-litre diesel. Toyota offers far more trim levels, and pricing varies from €15,585 (1.0 Terra) to €19,725 (1.33 Sol). All versions appear to be in Band A as well.

Unless you plan on travelling more than say 12,000 kilometres a year it's best to stick with the petrol versions. The 1.0-litre Toyota is the most efficient, but not by much and the Kia 1.25 engine and Toyota 1.33-litre are largely comparable, though the Yaris engine has a little more go in it.

Kia is more generous with its equipment, but only a bit, and there are more Toyota trim levels to choose from so you can tailor your needs. We'd urge you not to go for the entry-level versions of either though (LX and Terra respectively), as the step up to the next model is well worth it for what you get.

So that's the overview. In terms of our personal opinions we prefer the Kia Rio. It feels and looks more substantial and it drives well. Best bet is to go to a Kia and Toyota dealer and try them both out for yourself.

Let us know how you get on.

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Hi Barry,

Thanks for confirming via email that the total budget including trade-in is about €15,000.

One car that immediately comes to mind is the Honda Jazz. They're utterly reliable, easy to drive and park and are available with a decent enough CVT (continuously variable transmission) automatic gearbox. Here's an example on Carzone.ie. Emissions are in Band B so annual road tax is €225. The seating position is more upright in the Jazz than in most small cars so it's easier to get in and out of.

Another option is the Nissan Note. The automatic version's engine is 1.6-litre in size so emissions are higher, putting it into Band D for tax - costing €481 per annum. Otherwise it compares well with the Jazz, with easy access and good reliability in a compact package. Here's an example on Carzone.ie.

The Nissan Qashqai may also fit the bill, though it's a larger car overall, which I suspect is not what you're looking for.

If you need help narrowing the search down further come back to us - and let us know what you go for.

Expert answer

Hi Greg,

For your €5,000 budget (I'm assuming that's in total, even after you've sold the SEAT) you could get your hands on a late example of the first generation A-Class in A 140 or A 160 guises, both with an automatic gearbox. While the later versions improved, this car does not have a great reputation for reliability so make sure you properly inspect any one you're considering buying and ensure it has a full service history. They're costly to repair.

My money would go on a Honda Jazz. It's compact enough, but has decent space inside. There seem to be plenty on the market at your budget and most of the automatic examples have just 1.3-litre engines to keep costs down. On top of all that the Jazz has an incredible reliability record.

As ever check a car you're buying over thoroughly, but there are a few things to look out for on second-hand versions of the Jazz, as they can be expensive to fix. Check that the adjustment for the door mirrors works and that the car isn't jerky to drive at low speeds.

Let us know how you get on.

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Hi Antoinette,

First of all it's always worth remembering to focus on the 'cost to change' rather than the trade-in value alone. Your current car is unlikley to be worth quite €1,000 to a dealer so bear that in mind. If that gives you €5,000 in total to spend then you could potentially afford a 2005 Toyota Avensis. However, that price will get you a high mileage example so it may be worth going for a 2003/2004 example in good condition with low mileage.

I reckon you're better off with a petrol version if you're looking at an Avensis of that age. It was before the changeover to emissions-based taxation in July 2008, so the 1.6-litre petrol model was very popular - and is therefore in plentiful supply on the used market. Tax is cheaper too than the diesel of the same age due to it being calculated on engine size.

Along with that, 11,000 miles per year is not quite high enough to justify the potential extra cost of a diesel car in my opinion.

Hope that helps

Expert answer

Hi Mike,

The only reason you would specifically buy the efficient dynamics version of the BMW 520d is if you want to pay €104 in road tax, you want the best possible fuel economy and you don't mind changing gears yourself. I'd always prefer by luxury saloon car to come with an automatic transmission and in general, the used car market prefers if you do to. 

We could of course, give our opinions as to what is the best of these cars - but the fact is that they are all in and around the same price, they are all very good and they all offer different things. The BMW is regarded as the drivers car amongst the group although increasingly this is being matched by the excellent new Audi A6. The Mercedes is without doubt the most comfortable of these three cars so if have a very relaxed style of driving then the Mercedes might suit best. 

It does really come down to personal choice. The BMW is the best-seller and that probably won't change for some time. Also you have left out the excellent Jaguar XF, and now with a 2.2-litre diesel it is excellent value. That needs to be considered too. 

Expert answer

Hello Mary,

You will probably get offered in and around the €15,000 mark for your S40 Flex Fuel model, but this could stretch to €16,000 if you traded it in against a new car. You didn't mention if you wanted a new or a used small automatic to replace your Volvo, but I will assume that you want a new car. 

I am not sure how small you want to go, but there are a few decent small automatic cars around, but not that many. The best of them would probably be the automatic Ford Fiesta, which is a really great little car for the money. We quite like the Hyundai i20 1.4 Deluxe Auto too. This is a fine little car. My top choice and the one I would buy is the Skoda Fabia 1.2 TSI Sportline with the excellent DSG gearbox, which is simply superb. 

Hope that helps

Expert answer

Hi John,

You should ask for €26,000 and be prepared to drop down to about €24,500.

I hope this helps.

Expert answer

Hi Teresa,

As with any car exchange - you need to look at the cost to change, not the value of your trade in. At the moment there are lots of Ford Fiesta and Focus models on the used market so the values of them aren't great. The dealers are also pricing your cars as to what they will be worth in February 2012 when the cars arrive. 

You said you are going to shop around and that is exactly what you should do. We could tell you that your cars are worth more, but unless a dealer is offering you this then it is not much use. 

You need to shop around!

Expert answer

Hi Steve,

This is a really tough one and it's unlikely to be a simple answer. The integrity of the head gasket relies on so many other parts of the engine, such as the flatness of the cylinder head and the torque applied to the cylinder head bolts. It would be very difficult to prove any wrongdoing by the garage that originally fitted the part.

For the same reason, it's highly unlikely that that would give any guarantee on such work. It's just not the done thing.

I'd suggest you go back to talk to them and try to come to some compromise. When you do have it done again make sure you insist that the cylinder head is skimmed and that you get a receipt for that work. It may also be worth suggesting that the cylinder head bolts are inspected, as some manufacturers require these to be replaced, which a garage may not automatically do.

I hope all that helps. Come back to us if you need to know anything else.