SBS 2888 T is actually a daily bus for Express 518. Just that it
is rarely seen, as it is the sole Scania L94UB in SBST fleet as
well as the frequency of the service.
SBS 994 H was a former AMDEP MK4 DM. The "outer covering", the
rims, is now commonly found on AMDEP MK4 DMs only. Try looking at
services 21 and 131. It was mentioned to some enthusiasts that the
rims are actually for cosmetic reasons.