Charging pressure indicator ?

Hello @all, For about 2 weeks I have the following problem. Model 9-5 Aero Sportcombi EZ 04/2003 with Sentronic. The charging pressure indicator has 3 areas – green – yellow – red The full speed up the display is only slightly above the yellow area. In the “normal” / “sport” or manullen mode of the Sentronic. That would not be tragic if I did not have the funny feeling that a few pens would really rest in the stable. Should this charging pressure indicator in the “normal case” not correctly anze or can you label this ad as “nice to have”? MfG JürgS