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Hi Paul,

I presume you're talking about the 'new' 9-5 - the last car Saab launched before everything went pear-shaped? It's a little hard to tell on the reliability front how good or bad they are, simply because there are so few on the ground. That said, all of the mechanical and chassis parts are shared with the Opel Insignia, and that's a car that has proved very reliable, bar the occasional electrical niggle. 

I know what you mean about the shape and style - you're talking to a long-term Saab fan here, and the 9-5 was an especially nice car, massive for the money (practically Mercedes-Benz S-Class sized for the price of a BMW 3 Series) and, in the fine Saab tradition, had a huge and comfy interior. It's also pretty decent to drive, not BMW good perhaps, but nice all the same and the 1.9-litre turbodiesel engine should prove very frugal.

It is a bit risky, I suppose, but a risk I reckon might just be worth taking. Might be worth taking out an aftermarket warranty mind, just in case...

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Hi Janice,

Yes, but perhaps not the most economical in the class. Going on personal experience, a Mercedes-Benz E 200 or E 250 CDI will average in the high forties mpg whereas a BMW 520d or an Audi A6 2.0 TDI should easily get over the 50mpg barrier in everyday driving.

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Hi Eileen,

First up, we believe you mean rear-wheel drive cars. All BMWs (up to a new one launching later this year anyway) send their power to the rear or all wheels, and most Mercedes-Benz models do as well (though that's slowly changing). So, what's the 'problem' with rear-wheel drive? The stories you are referring to probably started off when we had those particularly long icy winters a few years ago. Many drivers of rear-drive cars found themselves stranded when others sailed past. This is down to lack of traction.

In a front-engined, rear-drive car there is very little weight over the driven wheels so in very slippery conditions it can struggle to put its power down. Most normal cars (i.e. not executive or sporty) are front-engined and front-wheel drive, where the weight of the engine over the wheels helps in low-grip conditions. Saying all that, sales of BMWs and Mercs etc. with rear-wheel drive are very high in countries that consistently have much worse weather than us, but the difference is that they habitually change over to winter tyres for a fixed portion of the year. These have a massive effect.

Back in Ireland, BMWs and Mercs are bought in relatively large numbers due to their status and image, yet they're not as expensive as they used to be. Most of the time here the lack of rear traction is not an issue, though some drivers don't like the feel of a rear-drive car in wet conditions. They're no less safe though, especially the latest models with all their driver aids.

Personally, I prefer rear-wheel drive, but I'd advise all buyers to try a range of cars to see what they like.

Hope that helps you understand those stories a little!

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Hi Niall,

Depends. Do you need lots of space in the back seats and boot? If so, go for the Merc, as it's the most practical car in the class by miles. It's also massively comfy and surprisingly spirited to drive. 

But, if space is not such a priority, go for the Jag. It's gorgeous to look at and simply stunning to drive with a sense of precision and feedback that most other cars have given up on. The 2.2d diesel is fine but if you can afford it the 3.0D S is a gem.

Let us know if we can be of further assistance.

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Hi James,

Well, frankly that's a good dilemma to have. Both are utterly excellent cars and you honestly won't go wrong picking either.

To compare, you're right that the BMW does feel that bit more reactive, that bit more plugged in to the road surface, but the gap between the A6 and the 5 Series is far narrower in that regard than once it was. 

You're also right that the 5 Series is becoming a touch, shall we say, common on the roads these days and while Audi is hardly struggling to shift A6s, they are perhaps a little less widely seen.

One small spanner in the works; have you tried the Jaguar XF? It does give a little away to both the Germans in terms of cabin design and space, but it's gorgeous and utterly brilliant to drive. Plus, of a Friday night, you get to turn to your significant other and utter the immortal words; "Darling, tonight, shall we take the Jaaaaaaaaag...?"

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Hi Colin,

I'm afraid a people carrier is pretty much your only option. The Renault Scenic, Toyota Verso or Citroen C4 Picasso can all take three abreast, as can the Peuegot 5008. If you want a conventional car that can carry three kids, your only choice is probably a Mercedes-Benz E-Class Estate with the optional pair of rear-facing seats in the boot.

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Hi Paul,

Generally speaking not too much trouble although it's worth bearing in mind that the 2006-on S-Class comes from a time when Mercedes-Benz was still suffering from problems in the electrical department. It's those electrics that are the most fragile point of any S-Class, especially the complicated Comand  infotainment and satnav system. Make sure everything works and budget some extra for problems in the future.

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Hi Joseph,

A nice car that, with a very smooth chassis, and while the 1.8-litre supercharged petrol engine sounds a bit rough and ready, it's pretty economical. 

Now, this car comes from an era when Mercedes-Benz quality took a distinct dip, and although the C-Class wasn't as badly affected as the E-Class, there are still some issues. Chiefly they're electronic (engine management, faulty keys) and issues with incorrectly specced brake discs being fitted, although a previous owner should have caught that one.

Listen for clonking sounds from the rear suspension too - it's not an especial weak point but can be indicative of problems ahead. 

Finally, don't if you can avoid it, go for the manual. Not only will an automatic have a better resale value down the line, with Merc's awkward foot-operated parking brake, manual C-Classes are just too awkward to drive.

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Hi Brigid,

That generation of C-Class was, sadly, not the most robust car that Mercedes has ever built, although thankfully it seems to have avoided the disastrous quality problems that afflicted the contemporary E-Class. 

There are a few problems in the engine bay, where dodgy crankshaft sensors can cause the engine to fall into limp-home mode or even shutdown altogether. Models fitted with Merc's Active Body Control sometimes had faulty acceleration sensors too, which set up a vibration that affects the car's high speed stability. 

Noisy power steering could indicate a fluid leak, while some cars actually had the incorrect spec of brake disc fitted. Finally, a lot of C-Classes had faulty remote lock keys, but it's rare for both keys to fail so if the car you're looking at has a spare, you should be OK.

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Hi Arthur,

Potentially, yes. There are some isolated reports of camshafts physically snapping and causing damage to the valve gear, but it seems to be relatively rare and only affects cars with mileages above 200,000 miles. There is also a somewhat more common issue of the timing chain breaking and causing similar damage, but the cure for that seems simply to make sure that the chain is replaced once the car nears or has passed the 150,000-mile mark.

Hope that helps