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Hi Patrick,

It should be fine, as it was the four-cylinder diesel that was troublesome on the E60 5 Series, and the straight-six engines are pretty solid. Just make sure that it has a full and complete service history and, if there are any gaps in the maintenance, walk away.

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Hi Keith,

No, it's not a waste of time at all. It's almost always better value to keep and fix an existing car rather than pay the cost-of-change to upgrade to something newer. That said, if you're convinced you need a better solution, then you won't do better than to go for one of the many car-vans on offer now. The Renault Kangoo and Citroen Berlingo are the best known versions, but there are also similar models available from Fiat, Volkswagen and Peugeot.  My personal pick would be the Fiat Doblo, fitted with the 1.6- or 1.3-litre MultiJet diesel engines. You'll find the cabin surprisingly comfy, it's quite pleasant to drive, very economical and good on tax and massively spacious in the back. There's even a seven-seat version available if you want to be really popular at the school gate.

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Hi Stephen,

At the time, they were very reliable and solidly built, but I’d be slightly wary now, especially if it’s a car with patchy service history. The diesel models develop problems with both the injection system and the air mass sensor, while the 1.6 petrol was underpowered and consequently has to strain to push the car around, leading to excessive wear and tear (especially to the front driveshafts).

The good news is that there aren’t too many fiddly electronic system to go wrong, but check the car over very carefully and if there are too many holes in the service record, walk away.

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Hi Kevin,

As discussed via email, as you knew from the outset that a six-month warranty was included and you never queried it then there doesn't appear to be be anything you can do after the matter. It's up to the individual seller/dealer/garage how much of a warranty to offer I'm afraid.

Hopefully your car will prove reliable in any case.

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Hi Ronan,

Thankfully the potential glitch list on XC90s seems to be pretty small, especially if you go for the diesel engine and the Asin-Warner automatic gearbox. Apparently most XC90 problems relate to the petrol engined versions, running a GM gearbox.

Make sure that the timing belt has been changed at 100,000-mile intervals. Check for outer-shoulder tyre wear caused by suspension mis-alignment. The top suspension mounts can be weak on the early models, but as the one you're looking at is a 2008, you should be OK, as Volvo replaced many under warranty. Wheel bearings can wear, so listen for rumbling noises and the brakes pads and parking brake mechanism are both prone to early wear.

Hope that helps; let us know how you get on.

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Hi John,

Interestingly, you haven't given us a budget to work with here, so that means a whole world of possibilities looked to be opening up, and then you hit us with the sub-2.0 clause, which instantly shut them down again.

So how about these for some suggestions:

Kia Sportage: you'll get a 2.0-litre diesel 4x4 auto for €35k and it's as stylish and good to drive as you could wish for.

Want something a bit more premium? How about an Audi Q3? Very stylish, but a bit more pricey. €41k gets you a 2.0 TDI quattro.

Finally there's the new Ford Kuga. Bigger and more practical than either of the other two mentioned, you'll pay €43k for a 2.0 TDCi diesel with Powershift auto.

What do you think?

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Hi Catherine,

A rough estimate of your C4's value should give you a budget of around €12,000 (and you might even do a bit better than that if you're lucky). Even at that level though, there is a plethora of cars matching your description out there. How about we start with something really classy? A BMW 316i maybe? Plenty out there, all priced around €11k and the 1.6-litre engine means reasonable tax and fuel economy even though it's a petrol engine.

Or you might need something a bit more spacious and economical. So we found a Citroen C5 Tourer estate with the 1.6-litre HDi diesel engine. It's a 2008 model so you'll be on the new CO₂-based tax system, it's massive inside and very comfy. Well built too.

Finally, you might fancy something a bit more compact and cheaper to run, and that budget opens up a world of Ford Focus saloons and estates with either the 1.6-litre petrol or 1.8 diesel engines. Simple, spacious, reliable and plentiful, you won't go wrong with that one.

WHat do you think?

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Hi Cathy,

The Eos is a nice car, right enough, but a bit thin on the ground here in Ireland. You may need to widen your search to the UK if you're going to find one you like.

That budget should give you a pretty good spread of possible purchases though. How about a BMW 318Ci convertible? Classy, practical and cool, we found one on Carzone.ie for €12,950. If you fancy something a bit smaller, there are a few MINI Cooper Convertibles knocking around at similar money. The MINI is not as practical as the Peugeot 207 CC you've suggested, but it is more fun to drive. Then again, the 207 does have that desirable folding steel roof.

But if you're really sold on the Eos, Karmann Volkswagen dealers in Dublin, on the Naas road, currently have one up for €12,950 with the 1.6 FSI petrol engine. Snap it up if you want it...

Let us know how you get on

Expert answer

Hi David,

We reckon the Impreza (and what a cracking car that was) should be worth between €2,000 - €3,000 to you, but getting a dealer to take it as a trade-in could be tricky - at least if you want to get the best price for it. It basically depends on the dealer in question. You might be better off going through the Irish Subaru Drivers' Club (http://www.isdc.ie) and seeing if one of its members is in the market for a car like yours. Subaru's appeal is still something of a niche thing and preaching to the converted may help you get a better price.

Whatever, it'll be worth it to get your hands on an RX-8. It's still one of the most fun, and coolest, cars we've driven in years and the day it went out of production (just recently) left more than a couple of damp eyes around here. Remind us to tell you some time about a late run across a deserted North Wales to catch the Hollyhead ferry in a 192hp RX-8...

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Hi Sean,

According to the official figures, the comparison in terms of combined fuel economy is this: the 520i gets 28.8mpg, the 525d gets 36.2mpg and the Lexus IS 250 gets 31.0mpg. A clear win for the diesel 5 Series there, but it's worth remembering that these figures are taken from laboratory samples and you may have to knock off as much as 25% to get the real-world driving figure.

Hope that helps