Hello Owner of merc w211 e220 Cdi 2007 226k I am having low fuel pressure issues. Star diagnostic code 22e7 Check high pressure control ‘rail pressure too low’ When i open up the throttle (hard acceleration) going up a hill or on motorway, the engine light comes on and car goes into limp mode. I used Star to check high pressure control, Quantity control valve, pressure regulator all sensors seem To be in working order. I tested the low pressure circuit, fuel pump seems to be in working order. Please i need some help.