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MAF Sensor..... help
hey guys... are there any mercedes guys here?
i need to locate the MAF on a 2005 C230 Kompressor...... anyone? here are pictures of the engine bay....... i know its in the area... just dont know what to look for or where... please point an arrow to it like you guys normally do..... thanks....!!!    
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07-12-2011, 02:45 PM
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Join Date: Oct 2003
Location: Mount Pleasant, South Carolina
Posts: 14,154
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I'm going to say this is it.
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07-12-2011, 02:54 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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The "screen thingie" that the air filter was hooked to with the flat bosch connector on it. Pic one is spot on
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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07-12-2011, 02:55 PM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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The MAF sensor is in the first picture. Unscrew the sensor from the airbox.
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07-12-2011, 02:57 PM
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Location: Mount Pleasant, South Carolina
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I wanted to confirm my post and my search found your post on MB World.
Even the pix from 2007 are the same. 
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07-12-2011, 02:58 PM
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jared.... sorry to be a knucklehead but can you point an arrow to it.... so far there are three answers on this thread. an arrow to the MAF and the connector please.
i dont see a connector on the grill looking thingy......... sorry guys im just a rookie on this stuff....... |
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07-12-2011, 03:02 PM
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a930rocket...
yup i just posted there... i JUST signed up there..... but i dont know anyone over there.... i trust you guys here alot more... been here since 2005 or so...... my bride to be a freaking out over her car and its idling funny..... so im trying to get some info on it..... looks like i inherited a bit of a headache fellas..... RRR. |
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07-12-2011, 03:04 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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Quote:
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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07-12-2011, 03:17 PM
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one of gods prototypes
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the maff is the whole round part which air travels through......as was arrowed LOL
the plastic mesh screen is to keep debris from flying into it as they are VERY sensitive, don't get a drop of oil on it or it'll burn up.......the wire which is monitored probes down into the "tube" and connects to the plug....... do not mess with it too much, it can't be cleaned......
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07-12-2011, 03:23 PM
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Location: Mount Pleasant, South Carolina
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^^^^
Can MAF cleaner be used? I've used it during tune ups, but not sure if it does any good. |
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07-12-2011, 03:34 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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Quote:
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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07-12-2011, 03:37 PM
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one of gods prototypes
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i've never had any luck cleaning sensors, because once they start to fail and cause running problems the wire/sensor has already failed......
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Brought to you by Carl's Jr. |
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07-12-2011, 03:57 PM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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 This is the MAF sensor. |
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07-13-2011, 07:49 AM
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thanks guys
thanks guys... even the smarties that have commented. much appreciated!
id rather ask some bonehead questions than take a chance and made a mistake or make things worse. |
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07-13-2011, 08:02 AM
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+1 for no luck cleaning.
Just replace it
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Randy '87 911 Targa '17 Macan GTS |
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07-13-2011, 08:21 AM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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I also think you probably won't have much luck cleaning it.
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07-13-2011, 08:23 AM
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You do not have permissi
Join Date: Aug 2001
Location: midwest
Posts: 39,842
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Just a question, but how was the determination made that it was a bad MAF?
There are a variety of things which could cause a bad idle, and the computer code only spits out what it thinks is wrong, not always what is actually causing that sensor to return data out-of-spec. For instance, there could be a vacuum leak after the manifold and the computer thinks the metered flow doesn't match the idle rpm, so it blames the MAF. Not second guessing the situation, just putting it out there. I'm a "parts guesser" myself so you don't want to make my mistakes.. Some high-end vehicles use a MAF and a MAP(manifold absolute pressure) sensor, I've been told. No knowledge of that model. |
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07-13-2011, 11:31 AM
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In the shop at Pelican
Join Date: Aug 2002
Location: Los Angeles, CA
Posts: 10,459
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is it a surging idle, like going up and down? If so, it's a vacuum leak, not the MAF.
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07-13-2011, 11:58 AM
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Unconstitutional Patriot
Join Date: Apr 2000
Location: volunteer state
Posts: 5,620
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Vacuum leak would also show up as a high idle.
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07-13-2011, 12:04 PM
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Do you have a CEL? The MAF typically will throw P0170 and P0173. You can remove it and spray the wire with CRC Mass Air Flow Sensor Cleaner. This might fix your problem but the if the MAF is bad it should throw the codes.
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Mike |
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07-14-2011, 02:20 PM
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Pre- H20
1985 Porsche 911 carrera targa 3.2
1987 Porsche 911 Targa 3.2 
Luft Kuhl
Big Blue
The SLK
Family Hauler
