Hello,

I know that for checking the auto tranny fluid, it is best to do it at a certain temperature. I read on the chart at bmwe34.net that the temperature is between 30 and 50C and they recommend doing it closer to 30C so it holds a little bit extra, but if you have no way of checking the fluid temp, how long should one let the car run?

I just let it idle for approx 15 minutes. From experience, on a totally cold start, around what temp range would that bring it up to? Is it best to check it again later, but at a lil less idle-time?

Thanks!