C350cdi fuel pump

[steve-V8s]

Have a 59 Plate c350cdi Estate.

Engine management light has come on, a few days ago suffered loss of power which seemed to clear itself. Port reader says electric fuel pump (error code 062900). I guess there is a low pressure pump which scavenges from the tank and feeds the high pressure mechanical pump at the engine end. Presumably there will also be a filter of some sort in front of it. Please could someone give me a clue where they are located. Underneath or under the rear seat ?

Thanks