Guys,
I'm new to this board and basically about sick of this problem I keep having. The car: 80K miles 97 E320. replaced fuel filter, 3 mafs now, plugs, coils and a crank position sensor..and a 175 diagnostic fee that told me nothing other than what I knew from my code scanner, "the maf was bad...."

The car has gone through 1 stock and 2 aftermarket mafs in less than 10K miles. I DON"T GET IT.
I've replaced the Crank Position Sensor last week thinking it was contributing to my problem, but to no avail.

The car just idles rough, oscillating rpm's between 500-700 and occasionally just cutting off altogether.

I have a code scanner and the only code that appears is the 0100 MAF! again..........

The GOOD IS, If I put in a NEW maf, the car runs like a top, but otherwise it runs like hell-O.

I don't like to give up on something easily, but I'm about ready to give this thing the boot. I can't keep going through these expensive maf's every couple months. Thats BS.... there has to be some reason why this car keeps frying them or why they are inexplicably dying???????

Help and out of the box ideas are appreciated.
Rob

Are you using "complete" Bosch units OR "inserts from China?

__________________
MERCEDES Benz Master Guild Technician (6 TIMES)
ASE Master Technician
Mercedes Benz Star Technician (2 times)
44 years foreign automotive repair
27 Years M.B. Shop foreman (dealer)
MB technical information Specialist (15 years)
190E 2.3 16V ITS SCCA race car (sold)
1986 190E 2.3 16V 2.5 (sold)
Retired Moderator

Are you using a stock air cleaner setup?

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Terry Allison
N. Calif. & Boca Chica, Panama

09' E320 Bluetec 77k (USA)
09' Hyundai Santa Fe Diesel 48k (S.A.)

If you buy one from mercedes, and it fails within a year, it can be warranteed.

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1980 500SE/AMG Euro
1981 500SEL Euro
1982 380SEL
1983 300TD
1983 500SEC/AMG Euro
1984 500SEC
1984 300TD Euro
1986 190E 2.3-16
1986 190E 2.3
1987 300D
1997 C36 AMG
2003 C320T 4matic

past: 1969 280SE 4.5 | 1978 240D | 1978 300D | 1981 300SD | 1981 300SD | 1982 300CD | 1983 300CD | 1983 300SD | 1983 380SEC | 1984 300D | 1984 300D | 1984 300TD | 1984 500SEL | 1984 300SD | 1985 300D | 1986 300E | 1986 560SEL | 1986 560SEL/Carat | 1987 560SEC | 1991 300D 2.5 | 2006 R350

A very good point..
Oiled performance filters raise hell w/Mafs...
..and look at the tubes that hold the Maf..it they are oil coated at all, check that you have not over-filled your crankcase oil level....

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A Dalton