That's still within acceptable limits. Specs allow the idle pressure to go as low a .3 bar at temp, as long as the gauge pegs by 1K RPM.
FWIW my 4.5 shows 1 bar (~15PSI) idling at temp while the 5.6 show 1.5 bar. The 4.5 pegs as soon as it is off idle and the 5.6 pegs well before 1K RPM. What did this car do upon accelerating?
'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.