That's the cam sensor.

You said in your original post that you've had trouble with this and that "almost" every sensor is new, so I'm assuming that that's one of them. You also said you've replaced the engine wiring harness three times. I was getting weird codes about voltage levels being implausible and just by chance had to replace the lower engine harness (the one with the positive battery lead), after which these codes disappeared; I suggest that you check the condition of the lower harness.

Best Regards,
Rob

__________________
Robert Fini

'12 ML350 BlueTec, 100k
'06 E320CDI (x2)
'05 T1N Sprinter 2500/Pleasure-Way Plateau TS, 70k
'97 C36AMG, 319k (son's)
'94 E320T, 249k
'93 190E Sportline LE, 168k (daughter's)
'84 190E-2.3/5spd (Stage Rally Racer)
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