Those are good numbers. Here's some more detail (from Alldata, 380SL)

COLD ENGINE PRESSURE TEST

Place valve on pressure gauge in open position.
Disconnect the electrical connector from the control pressure regulator.
Place the fuel supply circuit under pressure by bypassing the fuel pump relay.
Make sure that the cold engine control pressure ranges fall within the specifications shown. NOTE: If the control pressure regulator incorporates a barometric capsule (altitude corrector), take this into account when reading the test pressures. Temperatures given represent ambient air temp.

0°C (32°F) No Value Given

5°C (41°F) No Value Given

10°C (50°F) 1.2-1.6 bar (17-23 psi)

15°C (59°F) 1.4-1.8 bar (20-26 psi)

20°C (68°F) 1.6-2.0 bar (23-29 psi)

25°C (77°F) 1.8-2.2 bar (26-32 psi)

30°C (86°F) 2.0-2.4 bar (29-35 psi)

35°C (95°F) 2.2-2.6 bar (32-38 psi)

40°C (104°F) 2.4-2.8 bar (35-41 psi)

If the pressure tested is incorrect, retest with a new control pressure regulator.

WARM UP TEST

Connect the vehicle harness connector to the control pressure regulator.
Energize the fuel pump by bypassing the fuel pump relay; after 5 minutes, the control pressure should be 3.4-3.8 bar.
If these values are not obtained check the power at connector.
If there is current at the plug, replace the control pressure regulator.
If the rise in pressure occurs too rapidly, replace the control pressure regulator.
Shut off the fuel pump.

__________________
Chuck Taylor
Falls Church VA
'66 200, '66 230SL, '96 SL500. Sold: '81 380SL, '86 300E, '72 250C, '95 C220, 3 '84 280SL's '90 420SEL, '72 280SE, '73 280C, '78 280SE, '70 280SL, '77 450SL, '85 380SL, '87 560SL, '85 380SL, '72 350SL, '96 S500 Coupe