I saw a tech at a shop reset the light once with the ignition key. He turn the ignition on & off several time & the dashboard went into some sort of diagnostic mode. After that the code was gone. I just replaced a mass air sensor they said would cost me $750 installed. I got it in Texas for $219. Just need to reset light & feel if I go to dealer they'll charge me for that too.
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I'm afraid you don't have much of a choice. When a mass-airflow sensor goes bad, it brings the engine's fuel trim adaptations down with it. Once the mass-airflow sensor is replaced, the Check Engine light has to be reset of course, but then the self-adaptation values must be reset as well, or the light will come right back on within a matter of miles.
how does one reset the self adaptation value after the mass air sensor replacement? I can reset the codes with my scanner but what you are saying is that I need to bring it in a shop to reset the self adaptation value.
By the way, my car is a 97 E320 with check engine light (code P0170).
The adaptation values are reset through the Mercedes Computer or their portable lap version as well. I made a friend in my dealer who now takes care of any situation for me (takes computer home with him).... Good Luck
Got some new news from my buddies shop.. They order a Mass air flow meter for a Volkswagon & swap the sensor inside to your original for $40 Bucks. Its almost 1 AM so I don't know the part number. But if someone really needs this info let email me & I will get it for ya. Eraseram@hotmail.com .
Need help with enginecheck light (Engine Electronics) light
I have a 1997 E 320 - I washed detailed my car and sprayed the engine with water to clean it. It ran rough after this and today when I went to drive it, the check engine light came on ...and on tachomiter it displays "Engine Electronics" I tried the disconnect battery for a few minutes...did not reset - can this be plugged into a mobile code reader and reset? What can I do?