Expert answer

Hi John,

Lots of people find that their car's stop-start system stops working for no obvious reason, though it's disappointing that the garage fobbed you off rather than come up with a fix. 

We've had so many queries that we've put together a guide called Why won't my car's stop-start system work?

Have a read through that and see if it helps shine a light on the situation. Faulty temperature sensors and batteries in poor condition are very common causes.

Expert answer

Hi Barry,

Well, much though we love the new Camry, it’s actually quite small in the boot department — just 445 litres — so that probably counts it out here. The CR-V Hybrid is also a little short on boot space (just 497 litres). The incoming new Toyota RAV4 should have a decent boot, but if it’s boot space you need (and seat comfort too) then the Skoda Superb is hard to beat. Plus it looks smart, it’s nice to drive and well made. A brilliant package, really.

Relevant review links below:

Toyota Camry review

Skoda Superb reviews

Honda CR-V reviews

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Hi Andy,

While I don’t think a diesel car is going to be worthless by the time you trade it in, it might well be worth less, if you see the distinction. That said, with your mileage, I’d say you should be looking at petrol or hybrid all the way. A 2.0 TFSI A6 Avant sounds ideal if you can find one and assuming that you’re already happy that all three kids can fit safely and comfortably in the back. A BMW 520i Touring would be the most obvious alternative (and a darned fine one at that) and a Mercedes-Benz E-Class Estate even better again (assuming you can find one with a petrol engine) and you can find them with seven seats. Volvo’s old-shape V70 is also worth a look, not least from the safety point of view. That said, make absolutely sure you check out a current-shape Skoda Superb Combi estate too — they’re actually roomier inside than any of the premium-badge stuff, and very comfortable too.

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Hi Tony,

Well, it would certainly be worth trying to track down a petrol-engined 3 Series Touring estate, but as you rightly point out these are rarer than hens’ molars at the moment. Same story for the Audi A4 Avant and Mercedes C-Class Estate too, I’m afraid. Would you consider a VW Passat Estate? Or a Skoda Superb? A bit of a step down in class terms, I’ll grant you, but good, solid cars and you can track them down with the 1.4 TSI turbo petrol engine. 

Expert answer

Hi Fergal,

The Mondeo is a fine car, but it has fallen back a bit compared to previous versions and I don’t think it’s really comparable to the current crop of premium-badge saloons, which is a shame. The A4 is very, very good, but if you’re going to have to ‘rob a bank’ to get a BMW 520d then you’re going to have to do the same for the new A6.

That said, there are some very good mid-size saloons around at the moment that are better than a Mondeo, and which can give an A4 a serious run for its money. A Skoda Superb, perhaps? Volkswagen Passat? Mazda6? All well worth a look, and better value all-round than the A4.

Here are a few of our reviews to help you decide:

Audi A4 review

Ford Mondeo review

Volkswagen Passat review

Skoda Superb review

Mazda6 review

BMW 520d review

Expert answer

Hi Philip,

The short answer is that there are some benefits to using additives, but they’re not a miracle cure. Some additives, such as Redex, STP, or Dipetane, can apparently help to reduce the build-up of carbonised particles of soot and burned fuel on the insides of your engine, which can lead to improvements in reliability, fuel economy and emissions.

That said, there’s little here that’s scientifically proven. The benefits of additives tend to be more word-of-mouth than provable fact, but there’s certainly no harm in using them and if you notice a benefit, well that’s all to the good.

I would suggest that you’re better off sticking to a strict service regimen, using original parts and a qualified technical, than relying on additives though. And of course, as you already know, diesels need to be driven regularly to stay in good condition.

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Hi Peter,

If you want a mix of fun, comfort and not diesel, it’s kind of hard to beat a Volkswagen Golf GTI. Superb performance, practical and comfy cabin and 45mpg if you drive it gently.

Other good options are a MINI Cooper (a touch noisy on longer journeys, but with very good seats), a Ford Fiesta ST (hands down the best hot hatch currently on sale, but perhaps lacking a little in comfort), or a Peugeot 308 in GT spec with the 130hp 1.2-litre PureTech petrol engine.

Expert answer

Hi Martin,

We haven’t actually done that, as yet, but here’s a quick rundown of our favourites:

1. Skoda Superb Combi: massive, roomy, cavernous, spacious, replete with space — whatever way you want to put it, the Superb is the best estate around simply because you can fit the most amount of stuff into one. Looks good too, and is exceptionally comfortable. Not the sharpest thing to drive, but you won’t really care.

2. Mercedes-Benz E-Class Estate: really good looking, massive boot, staggeringly high quality cabin, comfortable, smooth 2.0-litre diesel and surprisingly good to drive.

3. Volvo V90: another one that’s surprisingly good to drive, with sharper steering than you’d expect. Gorgeous interior, exceptionally comfy seats and the only problem is that the boot isn’t quite as big as it should be. Exterior styling does kind of make up for that, a little.

4. Volkswagen Golf Estate: not the obvious choice perhaps, but adds extra space (lots of it — a 605-litre boot) to the Golf’s usual other qualities of quality and classiness. An ideal family car and more affordable to buy and run than an average SUV.

Expert answer

Hi Eamon,

Well, obviously the bigger the car the better, and if you can stretch to a long-wheelbase Range Rover...

At a more sensible level, the best car for long legs in both front and back is the Skoda Superb (both current and previous generation models). Also good choices are the Ford Mondeo, Toyota Avensis and Hyundai i40. If you need to come down a size, go for a Skoda Octavia or Honda Civic.

Expert answer

Hi Natasha,

Try a Skoda Superb - they have tonnes of rear space, which should give plenty of room even with the driver's seat shoved right back. Big boot too, plus they're reliable and nice to drive.