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#1
06-10-2002, 12:26 AM
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1994 C280 running too hot
Dunno what's up. I changed the oil ((have not changed the oil filter yet, though)) using Mobil 1 tri-synthetic 10w30.
It will run above normal without the A/C, and when the A/C is turned on, zoom! up the temp goes. I used a topsider to remove the oil. It only pulled about 7 quarts out and when I refilled it, it was just to the max mark on the dipstick, so I sucked some out...now it's about 3/4 of the way up between the min and max. And, to top it all off, the Check Engine light has come on 
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1994 C280 204k miles 
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#2
06-10-2002, 08:10 AM
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How hot is it getting? Start by checking the aux fan fuse.
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Ali Al-Chalabi 2001 CLK55 1999 Dodge Ram 2500 Cummins Diesel 2002 Harley-Davidson Fatboy Merlin Extralight w/ Campy Record
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#3
06-10-2002, 04:22 PM
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I have been hitting 100 degrees with the A/C on on hot days in stop and go traffic lately. As soon as I get out in the open it stays right at 80, or a little higher. Is this what you guys are experiencing, or is this hot? And it's a 94 C280 too.
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#4
06-10-2002, 04:55 PM
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That's close to what we're getting, but I would say we're between 80 and 100 during highway use and at or a little higher than 100 during stop and go in town type driving. This is up quite a bit. This car has yet to see 100 until the past couple of days.
We're in Northwest Arkansas and temps. have been mid 80's in our area.
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1994 C280 204k miles
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#5
06-10-2002, 04:57 PM
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In hot weather, stuck in traffic, with cold air blasting from the vents, both our 98MY cars will run a constant 94-97C, with 100C occasionally.
Once traffic opens up, 85-89C is about the temp it falls to. Open road in cool weather sees a constant 83C. (BTW, I checked these temps with the PBU diagnositics mode, so that's why they are more accurate than the guess-the-gauge numbers)
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John Shellenberg 1998 C230 "Black Betty" 240K http://img31.exs.cx/img31/4050/tophat6.gif
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#7
06-10-2002, 05:47 PM
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On my ACC panel, if I press the "rest" button for five seconds while driving, it cals up the diagnositics panel, giving the readout from many of the car's sensors.
I can check coolant temp, interior temp reading, bumper-mounted outside tep sensor, heater core temp, AC pressure, refrigerant temp, rpm, road speed, and charging voltage to name a few. I can't remember how to call it up on your pre 1996 ACC unit, but it can be done. Check David C Klass' posts on this subject... as well as this link: http://www.peachparts.com/shopforum/showthread.php?threadid=9166
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John Shellenberg 1998 C230 "Black Betty" 240K http://img31.exs.cx/img31/4050/tophat6.gif
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