yellow= central locking=ZV
orange=back up rods=RH
blacl=lid grip=SFG
gray+orthopedic-P+
clear=manifold vacuum=P
You do not have the vacuum headrests so FKS should be missing or capped.
The pump provides pressure to unlock vacuum to lock, it provides vacuum to the HVAC when the engine is not running or accelerating via a reservoir. The pump also provides pressure for the lumbars of approximately 600 mbar into another reservoir. There ia also a check valve to keep the generated vacuum from entering the engine. The pump has timeouts and pressure safeties.