# Re: [MBZ] 722.6 ATF Temperature chart

What difference does that make if you have no reference point as to how far the temperature stick is in the container? At that point you might as well stick a coat hanger down there and say 'well there is fluid on the end so I must have the right amount in there.'
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That said I can see how you can get a more exact measurement due to the temperature of the oil if the stick is made for the vehicle and is in the correct distance from the top of the tube.
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MG

Clay Monroe via Mercedes wrote:
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```Not nonsense.  Jim had it.  The fluid expands with rising heat in a vessel of a
given volume.  Knowing the temperature of the fluid allows a person to gauge
how full up the millimeter stick said fluid has risen.  The wire is marked in
millimeters, so one needs know the x (temp) and y(volume) to see if you are on
the mark of proper level.  Thus the graph.

I did not make this up.  This is some Fiat Chrysler magic based on Daimler
pixie dust

clay

```
```On Aug 12, 2019, at 7:53 PM, Craig via Mercedes <mercedes@okiebenz.com> wrote:

On Mon, 12 Aug 2019 19:37:03 -0700 Jim Cathey <jim.cathey...@gmail.com>
wrote:

```
```How can ATF temperature relate to fluid level?
```
```Various fluids have various thermal expansion coefficients.  (As do
solids.) Consider the mercury or alcohol used in a traditional glass
thermometer. ATF is fairly 'bloaty' with temperature, I believe.

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```The fluid temperature will at least depend upon how hot it is outside
and how hard you have run the car ...
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```The ATF is run through the radiator, to try to cap its upper
temperature. As a first-order approximation, after a good long run it's
at engine temperature.
```
```
If one, like Clay, is concerned that there is enough ATF in
the transmission, saying one can determine the ATF level in
the transmission by measuring the ATF temperature is nonsense.

Craig

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