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Old 10-14-2004, 01:51 PM
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Join Date: May 2003
Location: Atlanta
Posts: 398
Rebuilding MAF

So as some what explained in another thread, I have a 10 and 16 fault code on an M119.

I pretty much think the MAF sensor has gone whack. So I noticed that a lot of places offer rebuilt MAF sensors...what’s up with that? Can I rebuild it myself? What exactly is it that they are "fixing”?

How easy are they to change? Any instructions or tips for me?

any idea if code 16 is directly related to 10?

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Old 10-14-2004, 02:15 PM
WDV WDV is offline
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Join Date: Sep 2004
Posts: 10
AtlBenz, I had a code 10 on my 94 E500 and MAF replacement cleared it. The air filter housing will need to come off and you will see the MAF. Disconnect the wiring harness going to the MAF by turning the cap counterclockwise. Loosen the hose clamp holding the MAF to the throttle body then pull it off. The hose clamp will be a little hard to get to but I used a 1/4 inch drive 7 or 8 mm socket and ratchet. AFAIK rebuilders replace the wires in the MAF (you can see these wires if you look through it), and I don't think it is a DIY job. HTH.
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Old 10-14-2004, 02:26 PM
rdanz's Avatar
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Join Date: Sep 2002
Posts: 1,158
I'm not sure about MB but I know from experience with a Ford that you can clean the MAF sensor wire by spraying it with carb cleaner and allowing it to air dry before reinstalling. Have also done this with a VW. Both cases the cars ran better after.
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Old 10-14-2004, 06:46 PM
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2 Kings 9:20
Join Date: Dec 2002
Location: Whitehall, Michigan
Posts: 259
I've tried cleaning MAF sensors on my ML and '98 VW, to no affect (positive or negative). New MAF for the ML was $210 from Impex . Every place else was $60 more, or higher. Genuine Bosch part and it worked fine.

There are only three sports: bullfighting, motor racing and mountaineering; all the rest are merely games. --Ernest Hemingway

'10 GL550/'04 BMW 545/'99 BMW 323/'98 ML320/'87 VW GTI (race)
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Old 10-14-2004, 07:35 PM
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Join Date: Mar 2001
Location: Evansville WI
Posts: 9,616
The kind with "wires" (the system is called "Hot Wire", or more technically "LH-SFI, which is "Luft Hotwire-sequential fuel injection) rarely go bad. The bad ones came later with "HFM-SFI" and on to todays system, which in it's basic form is called "ME" (pronounced M. E.). HFM is Hot Film Management, this is where you have the small "chip" of film which gets comtaminated and/or damaged. The only real difference between hot wire and HFM is the Mass airflow sensor design itself, but the sensors are not interchangeable.
M E uses the same design sensor as HFM, but M E has the ignition system control integrated into the engine (fuel injection) control unit.


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