Anyone here know what the fuel pressure should be on a w210 1999 e320 4matic? i tried searching the forum but no luck. i tested with a gauge and got only 28-30 psi (200 kpa).

trying to narrow problem before ordering a $300 pump. problem is wont start when warm. cleared all codes by replacing mas, egr, egr tube, plugs, cam sensor, crank sensor. now i'm stumped and think it may be a fuel pressure problem.

Any help would be greatly appreciated.