My C230K 2004 have a diagnostic report fault codes P0452 and P0172. A mechanic told me that had problems with the pressure sensor low input and need to replace the fuel pump assembly. I was searching the web and I find that this model has two fuel pumps one in the passenger side and other on the driver's side and which of two is the report? Anyone know what the replacement number for this part? And install it. please contact me at benchmark88@gmail.com