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#1
05-16-2018, 08:41 PM
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Almost caught my car on fire!
Just a friendly PSA: Clean out around those Aux fan resistors!
Was working on the SDL earlier and kept smelling the faint smell of a grass fire. Looked down and saw smoke rising from under the fusebox! The famous Aux-Fan resistor was doing its best to start a pile of oak leaves on fire! The Shop-vac quickly solved the issue. It only takes a few seconds to look! 
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Current stable: 1995 E320 157K (Nancy) 1983 500SL 125K (SLoL) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) Gone and wanting to forget: 1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz] 
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#2
05-16-2018, 10:03 PM
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I have a 91 350SDL that had that happen to it, it DID catch on fire. I am still trying to decide what to do with that car. The hood needs to be replaced and the fuse box and wiring in that area is completely burned up. Trying to decide it its worth trying to splice in new wires or just scrap the car. Car has has the updated rods in in.
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#3
05-16-2018, 10:39 PM
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I'm just extremely fortunate that I was standing there when it happened. The leaves were all from live oaks and have been there since I got the car. A million wonders it didn't go up before now! Scary...
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Current stable: 1995 E320 157K (Nancy) 1983 500SL 125K (SLoL) Gone but not forgotten: 1986 300SDL (RIP) 1991 350SD 1991 560SEL 1990 560SEL 1986 500SEL Euro (Rusted to nothing at 47K!) Gone and wanting to forget: 1985 524TD 167K (TotalDumpster™) [Definitely NOT a Benz]
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#4
05-17-2018, 02:01 AM
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? Any chance of a photo of the resistor you're talking about ? .
TIA,
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-Nate 1982 240D 408,XXX miles Ignorance is the mother of suspicion and fear is the father I did then what I knew how to do ~ now that I know better I do better
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#5
05-17-2018, 08:26 AM
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It's a well known issue with the 126s. They use a similar power resistor to the 124 that provided the 2-stage auxiliary fan. However unlike the 124 (that has the resistor just behind the left side headlight) they put the resistor on the 126 in the well near the brake booster.
This area collects lots of leaves and junk from trees. The resistor gets hot when operating the fan on low speed (which is its normal mode, when it is just helping the a/c). Of course anything combustible on the resistor will start to smoke and burn.
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The OM 642/722.9 powered family Still going strong 2014 ML350 Bluetec (wife's DD) 2013 E350 Bluetec (my DD) both my kids cars went to junkyard in 2023 2008 ML320 CDI (Older son’s DD) fatal transmission failure, water soaked/fried rear SAM, numerous other issues, just too far gone to save (165k miles) 2008 E320 Bluetec (Younger son's DD) injector failed open and diluted oil with diesel, spun main bearings (240k miles) 1998 E300DT sold to TimFreeh 1987 300TD sold to vstech
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