Listen to Benzmac, he's seen enough of these to know what works and what doesn't.
Just unbolt the rotor from the hub and leave the wheel bearings alone unless the bearings feel rough when turning it.
I got off on my wheel bearing lecture, because you mentioned the grease seals.
'84 Euro 240D, 516K miles
'88 300E 5 Speed
'81 300D Daughter's Car
Over 800,000 miles in