Expert answer

Hi Brian,

Different versions of the same car can have different equipment levels, which can affect the weight of the vehicle and therefore its emissions. Equally, different model years can have different engine specifications (even if the basic bones of the engine are the same), which can affect the CO₂ rating. Or, of course, one could have a manual gearbox and one an automatic, which can have a major effect on the CO₂ levels.

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Hi Felix,

Looking at the 2.0 TDI automatic model at the start of the 2011 generation A6, there are a couple of known issues with the gearbox. The first is with the hydraulic accumulator, which may cause juddering. This potentially needs to be replaced to eradicate the issue. A separate issue comes from the transmission control module that can lead to error codes appearing on the dashboard - it requires reprogramming most likely.

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Hi Aaron,

Not necessarily. Officially the emissions-based taxation system came into force from the 1st of July 2008. Everything registered after that date is automatically on the CO₂-based system. For cars registered between January 1st and June 30th 2008, it’s a little different. Initially, they would have been taxed on the old engine capacity system, but if the tax cost would have been lower under the CO₂ system, then the car should have been switched over at first renewal. If it hasn’t been switched by now, it probably means that it’s more affordable to tax on the old capacity system, so has been left on that one.

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Hi Martin,

The price looks reasonable — about in the middle of the road for a 2015 A4, so the true value will depend on the car’s specification and its overall condition. A figure of 72,000 is a very reasonable mileage if it’s in miles (and if it is in miles check to see if the car was imported from the UK — that’s not necessarily a problem but you’d want to be a little more wary about its history if it is an import) and exceptionally low if it’s in kilometres. If it is 72,000 kilometres, rather than miles, I’d actually be slightly suspicious of that figure, as it may have had the clock turned back.

Audis are well-made, and generally very reliable and that 2.0-litre TDI engine is solid, but make sure that it’s had its software recalibrated to reduce its pollutants (the changes that were mandated after the diesel scandal became public) and make sure that it has a full and complete service history — these are complex cars that need looking after, so if there are any gaps in the service record, I’d walk away; there are plenty of other A4s out there.

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Hi John,

OK, that’s a slightly tough set of criteria, but I think we’ve found some winners. How about a Honda Insight Hybrid? Ultra-low CO₂ means ultra-low tax, it’s auto, Hondas run for ever, it’ll do 50mpg easy and there’s just about enough space for a family of three. Your budget gets you a 2010 model.

If you need something smaller, there are automatic Nissan Micras around for that sort of money, but you might find them a bit small for the wee one. Fancy something posh? You could try a 2010 Mercedes C 180 Estate, which we found, but the tax on that will be a bit higher. Something newer? A Skoda Fabia Combi estate from 2012? Reliable and tonnes of space in the boot. Cracking car.

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Hi Ashfaque,

We've not heard of a widespread issue with this in the i40, to be honest. If you're sure there's no way you could be accidentally shifting it into manual mode yourself, then the best advice is to bring the car along to a good mechanic to have it checked over. It may be best to bring it to a Hyundai dealer.

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Hi David,

If you are using the Navara strictly for business work, and not for social, domestic or pleasure use, then you can tax it as a commercial vehicle for €333 a year. If you are using it for any personal driving, then you have to transfer it back to the old by-engine-capacity tax system and, with a 2.3-litre engine, that’s going to work out at a hefty €994 a year, I’m afraid.

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Hi Mirza,

That's a really unusual one and you're best getting the car along to a good garage to have it inspected. There's a known issue with the original Peugeot 5008 1.6 diesel where the earth connection to the starter fails causing all kinds of random engine and starting issues, so this could be related, but either way you'll need a mechanic to fix it.

Best of luck

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Hi Zura,

OK, the good news is that you’ve got a clean record and a decent budget. The bad news, I’m afraid, is that an Irish insurer just won’t care about any of that. As far as they’re concerned, you’re starting with a blank slate. Sorry to have to tell you that, but the sad fact is that Irish insurers are incredibly hard to deal with and incredibly expensive on top.

I would think that €1,200 should be enough to cover a Focus 1.6 (especially given that you’re in your mid-thirties, which is considered a safe age), but it could be a safer bet to go for the Yaris, as insurers prefer a 1.0-litre engine (it’s an outdated view, but there you go). It would definitely be worth getting in touch with a good local insurance broker, though. They can often find better deals than are available through the usual websites etc. so definitely worth having a chat with.

Expert answer

Hi Razanne,

If this is the diesel version, it's possible that the issue has nothing to do with the stop-start system at all, as its engine is known to develop problems with the fuel injectors that could lead to poor running and stalling.

Otherwise, all we can suggest is that you read our Why won't my car's stop-start system work? feature to see if anything helps - and persevere with your mechanic to get to the bottom of the issue. An auto-electrician might be worth visiting, too.