After a good cold start my 190e 2.3 takes 5 or 6 tries to start after it gets hot but sometimes can take up to 3 hours before it will start. Problem worse in summer. Runs good when it does start. I was thinking it might be an elec problem but something I did last time makes me wonder if it is fuel. When I took the fuel line off of the injector module there was no pressure, i.e. no fuel squirted out until I keyed on, then a stream a couple of feet. So, vapor lock seems possible but for 3 hours? Any help?

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85 300 SD ~ 115K
82 500 SEC Euro ??K
78 450SL 164K