I love to drive this bus. But i have a question. There ist no light for the passengers.
There are, but you have to turn on the Masterswitch first then turn on the saloon lights.
On the Streetdeck the light cluster looks like this and the Masterswitch is the one on the far left (labelled 1 in the picture) and the Saloon lights are to the right (labelled 2 and 3).
And on the B5LH/TL the light cluster looks like this and again the Masterswitch is the one on the far left (labelled 1in the picture) and the Saloon lights are to the right (labelled 2 and 3).
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Both those images are taken from the manual by the way, I suggest you have a read of it. You would've found that out for yourself if you did.