Right around 1 bar at idle on my 103. On a hot day driving on freeway with a/c on, etc. it goes just under 1 bar ... about .8 -- not surprising since the engine has 247k on it. It always pegs at 3 though under load.

Good Luck

__________________
-Paul-
'01 E430, Sport 72,000 mi
'98 C280, 126,500 mi