I’ve only been in the A-Class for a few weeks but have already achieved a first.

On the 44-mile drive from Peterborough to Millbrook to attend Fleet News’s Company Car In Action event I hit the 70mpg mark, which isn’t far off the claimed official combined figure of 74.3mpg.

My test average fuel economy (64.2mpg) is pretty good too.

But I can’t help being sceptical about the reported figure as I’ve never achieved an average 70mpg in a test car before.

The last test car Fleet News had which achieved more than 70mpg turned out to have an inaccurate trip computer so I’ll be checking the accuracy of the A-Class’s read-out over the next few weeks. 

On the drive to Millbrook I also discovered it’s not always possible to put the full postcode in the sat-nav, which means you have to find a street nearby to type in.

I’ve since had the same problem on a different journey and ended up at the wrong address. It’s a bit disappointing for a sat-nav that costs £495.

The sat-nav on the Kia Ceed, which I was testing prior to the A-Class, had the ability to put the whole postcode in and is standard equipment.

Sat-nav aside, it’s hard to fault the A-Class and I can see why it’s in high demand.

Its modern, young image bears no relation to the original A-Class and its looks are combined with a very attractive sub-100g/km CO2 figure.

Since writing this review, Paul Quinn, local business development manager at Mercedes-Benz of Newcastle, has been in touch to inform us that the Becker sat-nav has now been updated and no longer suggests postcodes before you have finished typing.

However, even if you haven’t got the update there is a way round the problem, according to Quinn.

When prompted with the incorrect postcode before you have finished typing the postcode, press the back up button and continue typing the postcode in.