I have a 1979 450SL. I've had trouble starting the motor after the engine is warm. I've replaced the fuel accumulator and check valve. The car starts a little better but it still turns over and over (about 10 seconds) before it starts up. I have one or two fuel injectors that could be leaking. The mechanic that worked on the car checked the pressure with a guage and it held for about 15 minutes and then it dropped just a little. I'd hate to replace the fuel injectors and that not be the problem. Does anyone have any ideas about what's causing the warm startup problem?