i think as its an additional driver added to the policy rather than being the main policy holder its different as they may consider the young driver is being supervised rather than being in sole control of the car.
Possible reason but not what the Ts&Cs on MB website say, if the under 25 had actually been added I would feel that its possible for these reasons. Time will tell I guess. Of course any customer with an under 30 driver has to have Drive Smart (for ALL drivers) which will put people off adding younger drivers🤣
