I have a 2006 s60 AWD with 213k miles on it. So far I have had lots of work done by an excellent mechanic to get the car to stage zero, maintenance wise. My question - and tell me if I'm incorrect - is does my car have two separate fluids on the rear diff (haldex fluid for haldex, then gear oil for diff), and then one at the front axle (angle gear)? Is this correct? Little by little I'm changing all the fluids and wear items on the car for peace of mind. Just to share, in the last 2500 miles of ownership I've had the following completed:

Synthetic Oil Change
PCV System Overhaul (OEM and IPD kit)
Transmission Fluid Drain/Fill (Volvo Fluid)
Timing Belt & Water Pump and tensioners (OEM Volvo)
Front Control Arms R&R (OEM)
Front Strut Mounts and all parts above struts R&R (OEM)
Drain & Fill Haldex Filter & Diff
Front Sway Bar End Links (OEM)
Trans Torque Mount R&R (OEM)
Main Coolant Hoses and Coolant R&R (OEM Volvo)
Thermostat Replacement (Bosch)
Turbo Hose Ends R&R (silicone IPD)
Radiator Replacement (Nissens)

Any recommendations on things to do, small things I could add to this list in addition to the above question about the different fluids in the driveline? Upgrades (shadetree DIY or professionally done - either work for me) that make sense from a stock standpoint or slightly better that will make things more reliable / predictable as well as perform for the long run are most appreciated.