Germany manufacturers have an industrial standard within them.
It is common that both Mercedes-Benz and MAN use same type of wheel
and rims
They had the VÖV and
StÜLB standards for city buses and intercity
buses respectively, of which O.305s and SL200s were of the same
VÖV standard and O.405s (and Variants), SL202 were of
the VÖV II standard, but the standardization ended in
2000. From then on, Germany bus manufacturers developed their own
range of buses. The reason why you still see a lot of similar parts
on German buses now is that current designs are still largely
influenced by the buses produced in the VÖV and
StÜLB standardization period.
