So I replaced my fuel pressure actuator which was leaking: fuel bleeding through the return line when off, so I thought that's how I was bleeding gas, causing the car to require a long crank to evacuate air in the system.
The new one is not leaking but... it didn't solve my problem!!! Still the same issue.

I'm getting frustrated here.

What can cause that? Bleeding cold start injector?

Any ideas guys?

__________________
From 300CE to SLK230K