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#1
02-21-2006, 11:09 AM
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'99 E430 Sport--Bad Mas Air Flow sensor
Code thrown for fuel trim --bad mas air flow sensor. If I replace MAF with new OEM part, will dealer's computer be necessary to get perameters back into range or after I clear code , will car's computer reset itself properly over period of miles?
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John B Last edited by johneb48; 02-21-2006 at 11:52 AM. 
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#2
02-21-2006, 08:45 PM
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For '95 E320 (W124) it was just a swap and I had to reset the MIL. I'm certain the computer will adjust itself, but I don't know if the MIL resets itself.
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#3
02-22-2006, 08:37 AM
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Yes the computer is adaptative & will re-learn.... after 5-6 starts with new info the MIL light will stay off.
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MERCEDES Benz Master Guild Technician (6 TIMES) ASE Master Technician Mercedes Benz Star Technician (2 times) 44 years foreign automotive repair 27 Years M.B. Shop foreman (dealer) MB technical information Specialist (15 years) 190E 2.3 16V ITS SCCA race car (sold) 1986 190E 2.3 16V 2.5 (sold) Retired Moderator
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#4
02-23-2006, 07:11 PM
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maf sensor relearning
i got a 1995 c220, and have the same prblem. I checked for leaks,none found.checked fuel pressure, 56-61psi, checked for clogged injectors, fine.do i have to take it to the dealer to reset p0170 code???..i do hear the door actuator pump cycling on and off..
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