Hello Everyone, I'm new here, and VERY gratefull, This is a great resource and help to me. THANKS!

I just got, (about 2 months) an 87 560SEL 75Kmiles. Runs great, but..... When cold, it starts easily. If restarted within 5 minutes, it re-starts easily. If left for 20-30 minutes it takes an extended cranking time to start, about 5-7 full (long) seconds. During the long cranking, there is no coughing, catching, no nothing for about 5 seconds, then it comes to life,... rough for about 10-15 seconds. The symptons are very consistent.

From reading other threads, it seemed likely that the fuel line pressure was leaking off and fuel vaporizing? I've changed the fuel pump check valves, (both) and then the fuel accumulator. No improvement what-so-ever. So now what? Help....

I'm kinda clueless as to next logical step. Pressure checking? If so where? Thanks for you help in advance. JP