Expert answer

Hi John,

You've not mentioned which gearbox specifically, so we'll assume you mean the DSG automatic. These can develop faults with the 'mechatronic' unit that controls gear shifting etc. If that has to be replaced then it's expensive, though sometimes just changing the transmission fluid helps.

That needs to be done regularly in DSG units using the 'wet-clutch' setup. Those with the dry-clutch system don't need such maintenance.

If you've thinking about buying a car using a DSG transmission, then make sure you take it for a decent test drive through the full speed range up to motorway speeds and monitor the gear changing for judders or other issues. If possible, spend some time in stop-start traffic as well as that can cause the clutch packs and mechatronic unit to overheat if they are weak and you'll soon notice if something isn't right.

Saying all this, the DSG transmissions aren't necessarily bad designs, you just need to ensure the one you're buying is still operating properly.

Expert answer

Hi Ankit,

Let's go through your list for a start:

Suzuki Swift: Even the top-spec model with loads of options comes in under budget, has adaptive cruise control and can be had with an automatic gearbox. Easy to drive, well-specified, should be reliable, though doesn't feel as substantial as some of the other cars listed. Read our Suzuki Swift reviews here.

Volkswagen Polo: Only the Style and R-Line versions come with adaptive cruise control, but those are slightly out of budget if fitted with the DSG automatic gearbox so unless you stretch the budget this isn't an option. That's a shame as it's probably the best car in this list all things considered. Read our Volkswagen Polo reviews here.

Toyota Yaris: The 1.5-litre hybrid is an automatic by default, and as you've identified, the Luna comes with adaptive cruise control. It's the only version in the Yaris lineup within budget with those items and it's an excellent car. The rear seats aren't huge, but the fronts are fine, it drives fantastically, should be very reliable and the hybrid system is efficient and good to drive. Quite likely the pick of the cars here all things considered. Read our Toyota Yaris reviews here.

Dacia Sandero Stepway: An automatic gearbox is available, and even the most expensive version is well within budget, but this car can't be had with adaptive cruise control - only the non-adaptive type is fitted. Otherwise, it's a spacious and well-equipped car for the money. Read our Dacia Sandero reviews here.

MG3: All versions are automatic and come with adaptive cruise control, so those boxes are ticked. And even the most expensive version is within budget so it's a realistic possibility. It's the most powerful car here, which is probably not important, but it's quite efficient as well. The Yaris is a more polished product, but the MG has a little more space. Read our MG3 reviews here.

Hopefully that's all of help. I'd strongly recommend you and your wife go check out a shortlist of cars in person and test drive them to see which you prefer, as it will come down to personal preference.

Let us know which you go for.

Expert answer

Hi Michael,

I'd certainly suggest sticking with diesel given your driving profile so that easily rules out the 530e. Then things are not so clear cut.

There's a huge difference in price between the two used cars you're considering and the new Superb, which makes me wonder what you'd get in the used market for that same €53k (assuming you're buying outright, not on finance of course).

The used cars will have depreciated a little already of course, while the new one will depreciate more, relatively speaking, in its time owned by you. That's the sensible way of thinking, but there's nothing quite like a new car, either so only you can choose that.

Both the Superb and the 520d Touring are great cars, both similarly economical and comfortable, though the Skoda has the edge in terms of rear-seat space. The BMW is a little better to drive by way of compensation.

There's no right or wrong answer, in effect. I highly recommend you go and test drive as many representative cars as you can before you make the decision. 

Expert answer

Hi Patrick,

The exact figure will be on the car's log book, and we assume you mean the 1.5 TSI 150 as the 1.5-litre engine only came in that guise in the Karoq.

We found data for three different UK trim lines (I'm assuming you're looking at importing from the UK) and all came back with a NOx rating of 29mg/km. However, the highest CO₂ rating for these cars was 127g/km, not 133g/km, so it's possible that the actual NOx figure of the car you're looking at might be a little higher than 29mg/km.

It won't be much higher anyway so that's a good estimate for you to calculate the NOx levy from.

Expert answer

Hi Teresa,

We used to get so many queries on this subject that we published a feature called Why won't my car's stop-start system work?

If you read that you'll discover that the systems are highly sensitive to battery charge and load, even when working perfectly. Could it be that you often have high-load items switched on? Things like heated seats, air conditioning, rear window demister, that sort of thing.

Now, in a DSG-equipped automatic car, you shouldn't need to put the car into neutral to get the stop-start system to work - that's only on manual cars. You can leave it in D (drive). What does affect it, however, is how firmly you are holding your foot on the brake pedal when at a standstill. Sometimes it's necessary to give the brake pedal a firm push before the engine will cut out.

Other things to watch out for: if you move the steering wheel, it is likely to cause the engine to restart. And if you're in the Sport driving mode or you've selected the Sport gearbox setting, then stop-start might not work either.

If none of the above changes your experience, I suggest getting a mechanic to come out in the car with you to check it over and observe how you drive, and then let them do the same.

Best of luck with it - come back to us and let us know how you get on.

Expert answer

Hi Thomas,

It will depend on the detailed specification of the car (manual or DSG; hatch or estate; which wheels?), but it looks to be 67-71mg/km.

Expert answer

Hi Luke,

That car should have a NOx value of 39mg/km.

Expert answer

Hi Daniel,

In brief, CO₂ emissions used to be measured on the 'NEDC' test, which was found to be inadequate. It was replaced by the new 'WLTP' regime, which still measures CO₂ and outputs the rating that will be the only one used going forward.

So, the VRT and motor tax of an import, if it is registered after 1 January 2021, will be based on the WLTP CO₂ rating if it exists. If it does not exist, then Revenue 'uplift' the NEDC CO₂ rating according to a formula it has devised.

In the case of the 2020 Tiguan you mentioned, the 168g/km figure would be used. That means VRT of 26 per cent and annual motor tax of €420.

I recommend you read our three relevant guides, which have been updated since Budget 2021:

Motor Road Tax Prices in Ireland Explained

How Much VRT is Paid in Ireland?

Guide to Importing Cars from the UK

Expert answer

Hi David,

A trade-in value of €10,500 doesn’t look too bad to us to be honest. Values for a 2013 Scirocco are going to be at about the €12-14,000 level, and they’re not the easiest cars to sell so the dealer is probably leaving themselves some headroom to allow for that. I wouldn’t price it at more than €14,500 privately.

Expert answer

Hi Pat,

We certainly have noticed this trait in all Volkswagen Group DSG-based gearboxes (that's what the S tronic transmission is) and their attendant engines of late. The only explanation seems to be that VW’s various brands have trimmed back both engine power and responsiveness at low speeds, and especially at idle or when waking up from a stop-start cycle, in order to optimise their figures in the new WLTP emissions and economy tests. VW is certainly not the only one to do this, but it does seem to be more obvious with VW Group models than with some other manufacturers. Shifting the gearbox into Sport helps a bit, but it’s not a total fix.

One cure might be a total vehicle upgrade — we’ve noticed that the new ‘Evo’ versions of the 1.5 TSI petrol and 2.0 TDI diesel engines are noticeably less sleepy. Or, alternatively, trade in for a version with a manual gearbox — that is the simplest cure of all.