Hi!

First I am reffering to the thread below where I had problems starting the car:
https://mercedesforum.com/m_85054/mp..._/tm.htm#85116

I am now sure that the problem lies whitin the fuel pump area. I have tested a new relay, filled her up with fuel and the battery is almost new so there is no problem in those areas. I poured some "STP injection cleaner" in the fuel tank that supposebly cleans the system and makes the car operate smoother and since then I have started to experience problems. Could it be that some dirt have come loose and clogged the filter/hoses partially?

The car starts most of the time now and when it didnt start i crawled under it and tapped on the fuel pump, filter and the surrounding hoses and then I heard the pump go when I turned the key and it started. But it feels like the pump is making much more sound now and even louder sound when i make a sharp left turn. my fuel pump failing me, is it the filter (have bought a new filter and will replace it asap) or is it something else?

thanks for all your help!