Sounds like you're holding the wheel at full lock when turning. The pump will talk to you when you do that, it is saying "ouch"
Oil pressure should be up to 3 at anything above idle or when the engine is cold. At idle, it could be as low as 1 (maybe even .75 bar) when hot.
'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.