Hydraulic line ASR Pump Schematic for W140
 

I have been searching for a schematic for the ASR Pump & charge pump hydraulic lines on my 94 S600 Coupe. I have Alldata, it has a few diagrams, but doesn't seem to have a schematic of what line does what with respect to the ASR Pump & hydraulic lines. The problem is that my high pressure pump is running, but not building much pressure. I can't tell if it is receiving any fluid from the charge pump. A schematic would help me figure out of the hydraulics of the ASR system is supposed to work. Does anyone know if one exists? Thanks.