You should see around 1.4 bar with a cold engine measured at the large line on the WUR, rising to 3.5-3.8 when the engine warms. If you have 2-3 bar there is no way you will have any power cold.

The most common cause of high control pressure like this is a clogged filter screen in the inlet of the WUR.

BTW, you measure this with the gauge connected between the line and the WUR. I couldn't tell from your post how you had it connected.

__________________
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