Mercedes-Benz,Are thse current and relevant prices for this service, and how long does it take? REPLACE AUX VACUUM PUMP (OIL LEAKING FROM A

This was my diagmosis for car, Can I get these services without getting the seals replaced?

REPLACE AUX VACUUM PUMP (OIL LEAKING FROM
AUX VACUUM PUMP, CAMP PLUGS, AND CENTRIFUGE COVER) Fail $471.00

REPLACE CAM PLUGS (OIL LEAKING FROM AUX
VACUUM PUMP, CAMP PLUGS, AND CENTRIFUGE COVER) Fail $126.99
REPLACE CENTRIFUGE COVER (OIL LEAKING FROM
AUX VACUUM PUMP, CAMP PLUGS, AND CENTRIFUGE COVER) Fail $256.00
REPLACE OIL FILTER HOUSING AND COOLER SEALS/
WITH COOLANT SYSYTEM SERVICE AFTER (DURING
INSPECTION NOTED OIL LEAKING FROM OIL FILTER
HOUSING AND COOLER) Caution $790.21