6166S
BNDEP 6 
BNDEP SP
Running around very often. Suspect the 66xx series is taking
over the slot.
In fact, I think this bus might have left Sv 6 at the same time
as 8497Z. The cameo spottings seem to prove this..
But just KIV first. This might be the case of 6252B happening
again, where the bus disappeared from its perm svc for about a
month and cameoed before returning again.
Which 66xx Citaro is on Sv 6? I spotted 6604U today on Sv 6.
