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i have a 2000 ml430 with 193XXX on it. and the temp needle is always right there ,see pic, unless its really really cold out then it kinda stays at 80 . is this normal ?



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2002 ML500
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I have a '02 ML500, temperature gauge would fluctuate in between 80 and close to 100. Usually, it stays a little bit above 80. The first time I took the car to one of the passes, the temperature went up to close to 100, I had to pull over to take a look under the hood. After the trip, I took it to the dealer, the dealer told me it's normal, all cars do that. This is the only car I've owned the temperature gauge would fluctuate almost 20 degrees. It has been 8 years, and it's fine.
 

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2000 ML430 SOLD, 2007 BMW 328i Coupe, 2014 BMW i3, 2019 Honda Odyssey
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It's fine. Especially if you have been idling in one spot for a while.
 

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99 White ML320, 13 Audi S5,84 300ZX Turbo, 03 Audi A4, 03 Audi TT, 65 Ford Galaxie Conv
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474 Posts
Not sure how the V8's run (I assume all early ML's have the same cooling system), but my V6 has never been that warm. BY the way, I have 188K, so our mileage is similar. Even on 105 and 110 degree days with A/C in traffic. Understand the V8's have more heat to reject, so as bocabenz says, maybe it's normal.
 

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1990 190E 2.6,.... 1998 ML320, 2005 ML500SE
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My ML320 stays right around 80 most of the time. My ML500 fluctuates between just above 80 to just below 100, depending on driving conditions, as most stated above. I don't think you have a problem.
Mike
 

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1990 190E 2.6,.... 1998 ML320, 2005 ML500SE
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After the trip, I took it to the dealer, the dealer told me it's normal, all cars do that. This is the only car I've owned the temperature gauge would fluctuate almost 20 degrees. It has been 8 years, and it's fine.
I hate it when dealer mechanics say "it's normal, all cars do that", whether they are right or wrong. They are usually wrong.
However in this rare case I think they are somewhat correct.
Mike
 

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Any idea what would cause the temp gauge to drop, then shoot back up to 80? runs fine then "slips" drops down to 40/30 for sec or two then back up to 80. service engine light comes on
 

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Dallas, Texas
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Any idea what would cause the temp gauge to drop, then shoot back up to 80? runs fine then "slips" drops down to 40/30 for sec or two then back up to 80. service engine light comes on
Poor connection at coolant temperature sensor, corrupted CAN data, you name it. What kind of vehicle is it? What faults are stored after CEL come on?
 
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