Hi. I'm trying to diagnose a fuel delivery problem. Anyone know what the function is of each of the three hoses that connect to the in-tank fuel pump please ??? 1. Black 'quick-connect', 2. Blue 'quick-connect', 3. Black - clip. See photo attached.

Hi I'm new here...this is my first post. My 2004 L322 RR TD6 won't start despite healthy cranking. I let the fuel run low to the 40 miles range message. Then it fails to start and gives the "FUEL INJECT. SYSTEM" message. I've refilled the tank at home to over half full but still no start...