MAN 24.310 (also coded as A57 or A59) is a low-floor double-decker bus model built for the Hong Kong market. Unlike other low-floor double-decker buses in Hong Kong, there are steps in the lower deck aisle after the rear exit. For the type code 24.310, 24 means that the bus has the maximum gross weight of 24 tonnes, whilst 310 means that the maximum power of the engine is hp (kW).