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How do I reset Check Engine lite

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Old 01-17-2003, 09:11 PM   #1
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Angry How do I reset Check Engine lite

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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Old 01-17-2003, 11:31 PM   #2
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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.
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Old 01-18-2003, 09:50 AM   #3
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Talking Thanks MBtech208

Went to dealer this morning & light was reset.
Thanks For the info..
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Old 01-20-2003, 01:43 AM   #4
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1997E320.......

Where in Texas did you get the Mass Air Sensor for $219 ?

thanks, Randall
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Old 01-20-2003, 12:02 PM   #5
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Post Mass Airflow & other parts

Randall, you can go to the following web address
http://www.importecparts.com/

Here's a partial copy of my invoice:

Your shopping cart Contains the following.
Qty Brand Sku Description Retail Price Core Total
1.00 AAA:BOS B3130-85074 Air Mass Meter 373.35 219.95 0.00 219.95
1.00 AAA:BEH G4001-14603 Thermostat Kit 22.00 13.61 0.00 13.61

Core Charges: 0.00
Subtotal: 233.56
Shipping And Insurance - UPG: 0.00
Total Weight (pounds): 1.05
TX residents pay 8.25 %: 0.00
Order Total: 233.56


I bought the air flow sensor & thermostat kit for $234 with no shipping or taxes..
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Old 01-20-2003, 01:15 PM   #6
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1997E320.......

Wow......they have some great prices

Thanks again.

Randall
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Old 05-20-2003, 05:12 PM   #7
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mbtech208,

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).

Thanks

Delta
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Old 05-20-2003, 05:24 PM   #8
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Thats correct Delta

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
Fred
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Old 05-31-2003, 11:28 AM   #9
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Just replaced the mass air sensor but have not reset the fuel trim adaptation value. Does anyone know if disconnecting the battery for a few minutes would reset the fuel trim adaptation values?

Thanks

1997E320......... thank you for the info on importecparts.com. They have a really good price on the mass air sensor.
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Old 05-24-2006, 05:54 PM   #10
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that mass sensor you bought is the old number,that is why is cheap, the updated number is 0280 218 080, the old bosch number you had I bet was 0280 217 517
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Old 05-25-2006, 12:25 AM   #11
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Thumbs up What's up Gentlemen!!!

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 .
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Old 05-26-2006, 11:01 AM   #12
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So if I understand correctly, on a Mercedes you can't just use an OBD2 scan tool to read codes and reset the ECU to clear a check engine light?
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Old 05-26-2006, 04:54 PM   #13
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I've reset it!!

I've reset my light by just diconnecting the battery & reconnecting after a minute. wORKED for me....
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Old 06-24-2006, 07:24 AM   #14
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great

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Old 03-26-2013, 01:45 AM   #15
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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?
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