Brake flush, air filters and coolant.
We had a shop[ for 31 yrs only German cars saw the factory tool to evacuate & fill the cooling system I think it was over a grand , made my own with an old Snap-On radiator pressurizer, you know the one with the pump knob,a quarter turn valve and some hose, used a Vacula brake bleeder for the vacuum, suck down the sys, close vlv. stick hose in coolant jug, open valve and watch fluid go in