To apply the parking brake in the Lexus, you press it with your foot. To release it, you do the same. That’s fine in most circumstances, but if you don’t apply the brake firmly enough to hold the outfit on a slope you may release the brake by mistake when you try again.
Light, detached steering made it hard to place the Lexus precisely, and soft suspension allowed the caravan too much say through the lane-change test and when slowing from 70mph.
With the petrol engine and electric motor at full tilt, the 30-60mph sprint took just 11.3 seconds. The brakes did a good job, too, stopping the outfit in 11.1 metres from 30mph.
The boot coped with all of our holiday luggage and it’s permissible to tow using the slim spare.
No other big 4×4 can match the RX450h’s green credentials, with an official economy of 44.8mpg.