HARMONY is not the first word that comes to mind when reviewing the Mercedes-AMG GLS63. However, the sheer size of this seven-seat upper-large performance SUV could be directly proportional to the amount of criticism it would appear to regularly cop from some talking heads.

Being a 5130mm-long apartment block on wheels made in Tuscaloosa, USA, probably does not help the cause of this flagship GLS. It remains a sitting duck for jibes about it being too expensive, too excessive, too flabby and – again – all in proportion to an unfashionable Super Size Me diet.

Either way, this 2580kg, 5.5-litre twin-turbocharged V8-engined AMG could probably outrun the haters, leaving them in a wake of CO2. Or, perhaps, it could squeeze nasty comments into its boot.

Absorb the above, though, and then be prepared to wipe the cliches clean. There is a good case to be prosecuted for the GLS63 being more efficient than high-end sportscars. Careful not to spill your jumbo-sized fizzy drink.