Turning the wheel lock to lock with the engine running only helps purge air from the system, it is much better and cleaner (neater) to bleed using the bleeder valve and a length of hose. Loosen the valve, attach the hose and run to the resevoir. Let the engine idle, do not turn the wheel, and watch until the fluid runs clear and free of air bubbles.
To check/top off the fluid, all you need to do is take the top off the resevoir and check that the fluid level is up to the full mark. If it isn't, then top off with power steering fluid.
If the resevoir is nearly empty, then you will more than likely have to purge the system of air.
'73 280SEL 4.5 (9/72)- RIP
Only 8,173 units built from 5/71 thru 11/72
'02 CLK320 Cabriolet - wifey's mid-life crisis
2012 VW Jetta Sportwagon TDI...at least its a diesel
Non illegitemae carborundum.