If you see fuel pouring down the left / driver's >
side of the block it is probably the CSV or its hose leaking. I know it's frustrating, as I went through 3 Bosch CSVs in a year. My mechanic says they're all junk, as the metal & plastic parts can separate or crack. You also might make the hose a bit longer, if you are using the old one as a pattern.
Check for more info by performing a search over at m y e 2 8 dot c o m.