IN THE CROSSHAIRS

30 litres of petrol. It has an all-electric range of 55km and can recharge in about five hours. Bob Wherrett, email

Plug-in hybrids (PHEVs) can be a sound choice if you typically make short journeys. You can complete the commute emissions-free and have the back up of a petrol engine when you need to travel further. They have limitations – they’re much pricier than a normal combustion car and, unlike an electric car, you still have a petrol engine to service, repair and lug around. For some, like you, they can prove an ideal fit.

DISAPPEARING DIGITS

Our new Mazda CX-5 has a head-up display on the windscreen showing the speed limit and current speed. But if we wear polarised sunglasses we can’t see it. Turning up the brightness barely helps. Our old CX-5 had a pop-up Perspex screen that worked fine.

R and L Roberts, email

Head-up displays (HUDs) and polarised glasses aren’t a happy mix. Due to the glasses’ very nature, they filter out glare, essentially what your HUD is. Potential solutions include tilting your head (not ideal) or buying a pair of non-polarised driving sunglasses (I’ve done this). 3M offers a film to mitigate the problem. I’ve not tested it but some suffering similarly have reported it improves things a great deal.