Expert answer

Hi Kevin,

I can confirm that your car has a timing belt. The change interval should be 200,000km or every 10 years, whichever comes sooner.

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Hi Philip,

Not all marques and not all models use AdBlue as yet. AdBlue is a urea solution that can be injected into he exhausts of diesel cars to neutralise a significant proportion of their emissions of nitrogen oxides (NOx) - very much in the news at the moment of course. The rule of thumb is generally only that larger, more powerful engines need an AdBlue treatment system as many smaller engines don't need the assistance. Each manufacturer, and indeed each individual engine, will have its recommended AdBlue top-up times, and it will be directly related both to mileage and how much acceleration the car has been doing. You can top up the AdBlue tank yourself - a 1.5-litre refill should cost around €11-12.

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Hi Gary,

Volkswagen has confirmed that, following investigations, the EA288 engines, designed for EU5 and EU6 compliance, are not affected by the scandal surrounding the EA186 engines. In other words, the current Volkswagen diesel engines are fine and have been given a clean bill of health. If you've any lingering doubts over a car that you own, go to http://www.campaigncheck.ie and enter your reg number.

Read our full news story on this subject here

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Hi Ede,

It depends on which engine your Fiesta is powered by. The 1.4- and 1.6-litre TDCi diesels have change intervals of 10 years or 125,000 miles (just over 201,000km), while the petrol engines (1.25-, 1.4- and 1.6-litre) have timing belts that need to be changed every eight years or 100,000 miles (160,000km).

We'd always advise readers to have the timing belt changed sooner rather than later, especially if the service history of the car is unknown.

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Hi Prince,

That’s a tricky one. In terms of your consumer rights, you are most certainly entitled to a replacement car if this one is not up to scratch and the dealership has not been able to repair it to your satisfaction.

However, you’ll need to establish that there is a specific fault or faults with the car first. I’d recommend getting it inspected by an independent motor vehicle assessor (you can find them via a quick Google search) and get them to give you a full report on it. Then you need to bring that report to the dealer and demand that either the car is fully repaired (it’s still well within its original five-year warranty after all) or give you a replacement.

Let us know how you get on

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Hi Michael,

It depends on the model but if it's the Octavia 1.9 105hp then the CO₂ emissions are officially quoted as 135g/km, so you'll pay €280 a year to tax it. If it's a Fabia hatchback 1.9 TDI then it'll be €270 (129g/km of CO₂), a Roomster 1.9 TDI will set you back €390 (145g/km) and a Superb the same €390 (153g/km).

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Hi Frances,

If you mean a 320d diesel then yes, it's excellent. You should expect to get at least 45mpg in daily driving, a little more if you're careful.

If it's a petrol 318i or 320i then it'll be a little more thirsty but 35mpg on average should still be do-able.

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Hi Caroline,

If you're not doing mega-miles, then I'd say go for the C-Class. Assuming all being equal, it's a much nicer car than the CLA, which, although gorgeous, is a bit on the cramped side and not all that brilliant to drive. The C-Class is really smooth and comfy though, and much, much roomier inside.

Mercedes-Benz C-Class review

Mercedes-Benz CLA review

Expert answer

Hi Chris,

We put that question to Peugeot Ireland and the answer is simply no. It is not economically viable to make that change as the cost of the new parts and the work involved would be huge.

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Hi Lorraine,

It depends on the condition and history. If one has a full service history, has obviously been cared for and is in great condition - and the other isn't - go for the one in better nick. That overrides any question about diesel versus petrol. 

However, assuming the two cars are in similar condition and both have decent histories, petrol versus diesel comes down to mileage. If you're doing more than 15,000- to 20,000km per year, then you need to be thinking about diesel. Below that threshold petrol is the better option, unless of course that low mileage is all at high speed on the motorway.

Hope that helps