Unfortunately, the exact location varies slightly depending on the specific transmission used (e.g., 4R100, 5R110W). It's not easily accessible without removing the transmission pan or potentially accessing it through a specific access port (if the transmission has one).
To find it, you'll likely need:
* A repair manual specific to your E350's year and transmission type: This is the best resource for diagrams and precise location information.
* A schematic diagram of the transmission: This will show the sensor's location relative to other components.
* Possibly removing the transmission pan: This often provides the clearest view of the sensor.
Do not attempt to locate or repair this sensor without proper mechanical knowledge and tools. Improper handling of the transmission can cause damage. If you suspect a problem with your transmission temperature, it's best to consult a qualified mechanic.
