Hey Justin here. I am having a fuel pressure problem in my 2005 slk 350. I was sitting at a stop light and the car started idling rough and began to stall. I got it into a parking lot turned it of and it wouldn't restart. I took the fuel pump out of the tank hooked it up to a twelve vault battery and it ran fine. I switched out the fuse and relay and I still have now fuel pressure. Any ideas would be much appreciated!