ML270 struggling to start

[smanderson117]

Drove it to the Netherlands and back - runs a treat when it's going. But, the hot start issue remains despite new crank and cam position sensors. Leak off next when I get some time.

@tttonyyy did you ever manage to resolve this? I am in similar situation with my CLK 270 CDI. No air bubbles I can see in any LP lines. Injector leak off test seems ok if not perfect. Replaced pressure regulator after low pressure code and a breakdown, all seemed ok until it happened intermittently again a few times and longer crank (more so when hot). HPFP changed today, still same issue, long crank! It will start but it does take a while. Lost confidence in car for any long journeys until this is resolved, would appreciate any further insight