Another MAF?!

**FishtailnZ** · 07-23-2008

Check engine light came on, made a quick run into the dealer to get it scanned - yup another new MAF in my future, this'll be my second one under warranty *L*. Tech said they've had a few replaced now on the M113...maybe it's a Canadian thing!

P.S. Neither this time nor the first has the car shown any driveability issues...weird.

**etyu** · 07-23-2008

Sorry to hear Bill.

How many miles on the odometer? Do you check and "dry clean" the green air filters every quarter (4 months)?

**jbanks15** · 07-23-2008

sorry to hear that also. were you by chance running green,k&N, or sports filters? just asking as my ex-350 had a sports filter dissolve into the maf, but it was caught in time before any stuff got into the maf.

**DansSlk** · 07-23-2008

Quote:

Originally Posted by FishtailnZ

P.S. Neither this time nor the first has the car shown any driveability issues...weird.

Then i'm inclined to think its not the MAF mate, MAF Fault = No Power as i'm sure you know.

**FishtailnZ** · 07-23-2008

Quote:

Originally Posted by etyu

Sorry to hear Bill.

How many miles on the odometer? Do you check and "dry clean" the green air filters every quarter (4 months)?

Quote:

Originally Posted by jbanks15

sorry to hear that also. were you by chance running green,k&N, or sports filters? just asking as my ex-350 had a sports filter dissolve into the maf, but it was caught in time before any stuff got into the maf.

Just shy of 27k on the clock now. First replacement was about a year ago during the time when I had the stock filters in there exclusively. Re the Greens, I've only used them on the dyno last year and each visit to the dragstrip - been saving them for just that use alone...that way they're always nice and clean *L*.

Quote:

Originally Posted by DansSlk

Then i'm inclined to think its not the MAF mate, MAF Fault = No Power as i'm sure you know.

I agree Dan so I asked the tech that very question, and he said the MAF signal may just be out of spec enough somewhere in its range to trip the light, but not affect driveability...I dunno. I've had MAF issues with other cars that basically left them undriveable.

**DansSlk** · 07-23-2008

Doesn't really work that way with a MAF, it compensates until it craps out and they turn to mush like you very correctly say.

Sounds like some sort of issue hiding under the MAF error, if its not effecting performance I'd be inclined to just replace it and go but i suspect its going to return at some point.

A good way to test MAF function is to disconnect it and see how the car behaves, equal or more performance means a bad MAF and worse performance means good MAF.

**FishtailnZ** · 07-23-2008

Thanks Dan, I'll try that in the next day or so when I get some slack time. And if it keeps happening, well it's a good excuse to trade it in on an SLK63 when the warranty runs out in a couple years!

**UK-C200** · 07-23-2008

Quote:

Originally Posted by FishtailnZ

Thanks Dan, I'll try that in the next day or so when I get some slack time. And if it keeps happening, well it's a good excuse to trade it in on an SLK63 when the warranty runs out in a couple years!

Hmmmm - I though we'd given up on the though of an "SLK63" and settled for a "SLK55 TT"

**FishtailnZ** · 07-23-2008

OK, I'll settle for one of those too - as long as it's still got a great honkin' stump pullin' loud bellowin' politically incorrect V8 lump still sitting in the engine bay!

**DansSlk** · 07-23-2008

Quote:

Originally Posted by FishtailnZ

Thanks Dan, I'll try that in the next day or so when I get some slack time. And if it keeps happening, well it's a good excuse to trade it in on an SLK63 when the warranty runs out in a couple years!

Ditto on the replacement - completely fireproof justification, on the MAF issue test with a warm engine and drive up and down the street a few times, you don't want to go very far without the MAF but sitting at idle wont give you a valid result.

**FishtailnZ** · 07-24-2008

Thanks again Dan!

07-23-2008	#1 (permalink)
FishtailnZ Don't feed the trolls... Join Date: Jul 2006 Location: Nfld., Canada Vehicle: 2009 C63 pipelined Other Toys: Wife, kids, dogs... Posts: 1,506 Country: Thanks: 294 Thanked 223 Times in 99 Posts	Another MAF?! Check engine light came on, made a quick run into the dealer to get it scanned - yup another new MAF in my future, this'll be my second one under warranty L. Tech said they've had a few replaced now on the M113...maybe it's a Canadian thing! P.S. Neither this time nor the first has the car shown any driveability issues...weird. __________________ - Bill Waiting on a 2009 C63 Fire Opal/Alpaca Premium+Media R.I.P. 2006 SLK55 Caspian Blue/Beige Stock 1/4 mile results: ET 12.72, trap 110.80, 60' 1.80 Some guys they just give up living and start dying little by little, piece by piece. Some guys come home from work and wash up and go racin' in the street... - B. Springsteen

07-23-2008	#2 (permalink)
etyu Founding Member #2 / Ambassador Of Good Will Join Date: Jun 2006 Location: Orange County, CA Vehicle: 2008 SLK 55 Posts: 5,306 Country: Thanks: 381 Thanked 282 Times in 173 Posts	Sorry to hear Bill. How many miles on the odometer? Do you check and "dry clean" the green air filters every quarter (4 months)? __________________ *Eddy* To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Pewter/Beige, PIII package, Airscarf, Hands-Free Communication System, Lighting package Designo Black Leather Cover on e-brake handle, ( To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts. Bill T), SmartTop v1.0, Kleyman 3BFM (NoRegret Custom), Green Air Filters, *Mod. R170 ant., EuroClear sidemarkers w/PIAA PlasmaIon lamps, chromed front & rear turn indicator lamps, PIAA SuperPlasmaGTX front parking lamps, bilateral rear fog lamps enabled. Last edited by etyu; 07-23-2008 at 12:46 PM. Reason: corrected grammar*

07-23-2008	#3 (permalink)
jbanks15 Founding Member Join Date: Jun 2006 Location: Valrico, Florida Vehicle: 2009 SLK 55 AMG Posts: 708 Country: Thanks: 8 Thanked 42 Times in 30 Posts	sorry to hear that also. were you by chance running green,k&N, or sports filters? just asking as my ex-350 had a sports filter dissolve into the maf, but it was caught in time before any stuff got into the maf. __________________ Jeff 2009 SLK 55 AMG Black/Black Premium 1, Multimedia, Lighting packages Clearshield Protective Film OEM MB Plexiglass Windscreen Eurolight Clear Side Markers Smarttop version 3.22 Kleyman 3rd Brake Light Flashing/Strobing Module V1.5 (Noregrets Custom Works)

07-23-2008	#6 (permalink)
DansSlk Dude Join Date: Jun 2006 Location: Wales Vehicle: 05 B55S (Brabus 6.1 S) Posts: 6,794 Country: Thanks: 96 Thanked 225 Times in 177 Posts	Doesn't really work that way with a MAF, it compensates until it craps out and they turn to mush like you very correctly say. Sounds like some sort of issue hiding under the MAF error, if its not effecting performance I'd be inclined to just replace it and go but i suspect its going to return at some point. A good way to test MAF function is to disconnect it and see how the car behaves, equal or more performance means a bad MAF and worse performance means good MAF. __________________ One thing you will learn with German cars - If it's simple it ain't happening.

07-23-2008	#7 (permalink)
FishtailnZ Don't feed the trolls... Join Date: Jul 2006 Location: Nfld., Canada Vehicle: 2009 C63 pipelined Other Toys: Wife, kids, dogs... Posts: 1,506 Country: Thanks: 294 Thanked 223 Times in 99 Posts	Thanks Dan, I'll try that in the next day or so when I get some slack time. And if it keeps happening, well it's a good excuse to trade it in on an SLK63 when the warranty runs out in a couple years! __________________ - Bill Waiting on a 2009 C63 Fire Opal/Alpaca Premium+Media R.I.P. 2006 SLK55 Caspian Blue/Beige Stock 1/4 mile results: ET 12.72, trap 110.80, 60' 1.80 Some guys they just give up living and start dying little by little, piece by piece. Some guys come home from work and wash up and go racin' in the street... - B. Springsteen

07-23-2008	#9 (permalink)
FishtailnZ Don't feed the trolls... Join Date: Jul 2006 Location: Nfld., Canada Vehicle: 2009 C63 pipelined Other Toys: Wife, kids, dogs... Posts: 1,506 Country: Thanks: 294 Thanked 223 Times in 99 Posts	OK, I'll settle for one of those too - as long as it's still got a great honkin' stump pullin' loud bellowin' politically incorrect V8 lump still sitting in the engine bay! __________________ - Bill Waiting on a 2009 C63 Fire Opal/Alpaca Premium+Media R.I.P. 2006 SLK55 Caspian Blue/Beige Stock 1/4 mile results: ET 12.72, trap 110.80, 60' 1.80 Some guys they just give up living and start dying little by little, piece by piece. Some guys come home from work and wash up and go racin' in the street... - B. Springsteen

07-24-2008	#11 (permalink)
FishtailnZ Don't feed the trolls... Join Date: Jul 2006 Location: Nfld., Canada Vehicle: 2009 C63 pipelined Other Toys: Wife, kids, dogs... Posts: 1,506 Country: Thanks: 294 Thanked 223 Times in 99 Posts	Thanks again Dan! __________________ - Bill Waiting on a 2009 C63 Fire Opal/Alpaca Premium+Media R.I.P. 2006 SLK55 Caspian Blue/Beige Stock 1/4 mile results: ET 12.72, trap 110.80, 60' 1.80 Some guys they just give up living and start dying little by little, piece by piece. Some guys come home from work and wash up and go racin' in the street... - B. Springsteen

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