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#1
01-24-2007, 11:22 PM
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ml320 aux. fans
My wifes ml320 check eng. light came on and comp. says its aux. fan problem.checked 44 fuse-good.fans don't turn when engine gets hot or when ac is on!Swaped relays in fuse box-nothing.Pulled plug at fans,checked voltage-nothing.Fans turn freely by hand.Is there some kind of senser that turns on the aux.fans and could that be my problem?Trying to get car inspected but can't because of check eng. light!!!
Thanks for any help!!!! 
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#2
01-25-2007, 12:39 PM
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why don't you scan the code to find out what tripped the CEL. I don't see how the aux fan problem would trip the CEL. plus I don't think in winter time the fans will kick in even if you turn on the A/C, the temperature is just not hot enough.
__________________
 98 ML320 (gone but not forgotten)
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#3
01-25-2007, 02:45 PM
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thats true, I've done tons of them where the fuse for the aux fans is blown and the customer is oblivious to this. no ck eng light on either.
I'm assuming youre talking about a 163 because you mentioned fuse 44. a 164 will set off a warning if the engine fan doesnt work.
__________________
 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
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#4
01-25-2007, 04:22 PM
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Probably the fuse panel itself, assuming everything you've said is true.
Gilly
__________________
Click here to see a photo album of my '62 Sprite Project Moneypit (Now Sold)
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#5
01-25-2007, 05:54 PM
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thanks everyone,going to autozone tonight to check computer!the last time i had it checked it cost me $75.00 and the told me it was air flow sen. replaced at $200.00 and that didn't make the check eng. light go off!!!!
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#7
01-26-2007, 08:58 AM
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replacing a part is not going to make the light go off alone, you will need to erase the code.
__________________
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
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