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Hi John,

To be honest, it's a little hard to tell. The A3 Saloon hasn't been out long enough for us to get a solid handle on its resale values but we can work from a couple of basic assumptions:

 1. Yes, diesel is currently more highly valued than petrol.

2. That won't always be the case - now that the mad post-2008 scramble for diesel has subsided buyers are starting to get wise to the value of petrol power again, helped by improved engine tech.

3. An Audi, any Audi, will likely have stronger residual values than most other marques so you're already ahead of the game.

So I guess the answer is yes, your depreciation will be a little sharper on petrol than on diesel but I suspect it won't be by very much. Fret not and just enjoy owning one of our favourite current cars. 

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Hi Brian,

Yeah, I think you're probably right to stick with diesel with those sorts of mileages. Mind you, it's worth pointing out that those two Volkswagens you have aren't on mega-miles yet and it could be more cost-effective to spend a little on getting them spruced up and fit for thousands more miles than chopping and changing.

That said, if you're in need of a good, reliable family car then I'd have a long look at a Toyota Avensis estate. The 2.0-litre D-4D diesel engine is a good 'un and cheap to tax, it's comfy, ideal for long motorway runs and if it's not the most exciting car in the world, then at least it's solidly reliable. Spacious too.

Probably the most cost-effective option is to replace the high-miler with something younger and fitter and then spend a little extra to keep the runaround Golf fresh.

 Let us know what you decide on.

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Hi Lizzy,

Well, for a start, you're looking at two different segments here. The 3008 and Qashqai are much larger than the Juke, which is really quite a small car, especially on the inside. So, if you're regularly carrying large people or large loads, then I'd cross that one off your list. It's a little hard to say exactly how reliable any car is, but a good indicator is the result of the JD Power customer satisfaction survey. The most recent one, done in the UK last year, showed that Nissan was in the top ten for reliability and satisfaction while Peugeot finished in the bottom four.

Take from that what you will.

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Hi Martin,

I'd say you're looking at a trade-in value of between €5-6,000.

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Hi Colin,

There's not much to choose between the two in terms of overall talent, practicality or reliability, but my instinct would be to go for the Golf - that second generation Focus had a rather plain, unlovely cabin whereas the Golf's is much comfier and more welcoming - important stuff with a long regular journey like yours. The only other thing to consider would be the cabin space - if you often carry tall passengers in the back seats, then go for the Ford, it's much more spacious.

Let us know which you go for

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Hi Meeka,

I personally bought a 2006 Volvo V50 1.6 diesel, which is the estate version of the S40 so I know a little about them. I'm assuming that S40 is 1.6 diesel as well, as most are from that year. The most important thing about this engine is that it is used regularly at motorway speed (to burn off deposits on the diesel particulate filter - DPF) and that oil changes are also regular, and done with the right oil. Insist on a full service history and the more reputable the garage the better.

Make sure the DPF warning light is present when the ignition is turned on and that it then goes out soon after the car is started up. If it's missing completely it means there's a reason someone removed it - walk away.

Other than that I found the car to be very well equipped for the price, making it much better value than a similarly priced Focus or Golf from the same year. It's also more spacious than those cars - though not by much.

Let us know how you get on

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Hi John,

Nothing major to worry about although there are a few electrical glitches - the keyless ignition system (if fitted) can give trouble, as can the hands-free locking and unlocking (again, it was an option). There have been isolated reports of the 2.0-litre diesel engine cutting out unexpectedly too. Check the interior trim carefully as well - Mondeos often rack up big mileage and while the mechanical bits are sold, the cabins can suffer from abuse - look for collapsing seats or disintegrating trim.

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Hi Sandra,

The only persistent issues with the Insignia are electrical problems that can effect everything from the door locks to the alarm system. Usually these are just minor problems that can be fixed, but occasionally the problem is in the wiring loom itself and that's a much bigger deal. Check and make sure all the buttons work and also check the boot area for any dampness - the boot seals can leak and allow in water. For a 2.0-litre diesel Insignia, I'd be disappointed if you couldn't get it to do 50mpg in everyday driving.

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Hi Dan,

Of all the ones you've mentioned there, I'd actually have a long, hard look at the Volkswagen Jetta. True, it's not the most exciting car of all, but with the 1.6 TDI diesel engine coupled to the DSG automatic gearbox, you should be able to squeeze terrific fuel economy out of it: 55mpg should be easily do-able, perhaps even the sunny side of 60mpg. It's sweeter to drive than you'd think too, really comfy and built like a tank.

What do you think?

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Hi Aidan,

Personally I'm a sucker for the E-Class Estate. In fact, if my Lotto numbers came up I think it would be the first car in my dream garage - right alongside the 911 GT3 and the Twisted Defender...

That 250 CDI diesel is an excellent engine too. A touch noisy, but very economical and if it's practicality you're after, the E estate's boot is a massive 700-odd-litres. Spacey. 

The S-Class is still a cracking car of course but it's thirstier, more expensive to fix when it goes wrong and far less useful than the E-Class.

Let us know what you decide do go for.