The third and current ‘W465’ iteration of the G-Class, launched last year, is also sold as the 579hp electric G580 and 367hp diesel G450d, but it’s the 449hp petrol G500 I am driving here.

The Gulfstream G400, a member of the GVII family which includes the G500 and G600, is among the latest twin-engine business jets to be produced by US-based manufacturer Gulfstream Aerospace. The ...