Hi I'm new here, so bear with me.

I bought a 78 240D last week. It test drove well on two occasions, then drove 60 miles home on the interstate and did great. But then it wouldn't start the next morning and i haven't been able to start it since.

I've searched around here a little. I've checked the glow plugs and looked for fuel leaks. I repalced some of the fuel lines that looked older and bled the fuel system. I replaced the battery cables. The glow plugs are filament type, and they are all getting volatge, but i don't know what kind of voltage is normal. I can also see a small pocket of air in the fuel prefilter that i can't get out, is this ok? or should i have absolutly no air visible?

Any advice would be much apppreciated.

John