Hard starting after engine warm.

[anrev2]

I have a 1979 450sl. When the engine's cold all I have to do is turn the ignition key and it starts right up. After the engine warms up and I try and start the motor it is hard to start. Do you know what could be causing this?

[juice1492]

You can do a search and find several threads discussing this issue. The general consensus is a bad fuel accumulator, fuel pump check valve, or leaking injectors. I replaced the fuel pump and fuel accumulator on my 79 450 SL which emlimated my problem.