FORD 2014 E-450 v.1 - Manual (Page 203)

5. Remove the dipstick, wiping it clean with a clean, dry lint free rag.
6. Install the dipstick making sure it is fully seated in the filler tube.
7. Remove the dipstick and inspect the fluid level. The fluid should be in
the designated area for normal operating temperature or ambient
temperature.
Low Fluid Level
Do not drive the vehicle if there is no indication of fluid on the dipstick
and the ambient temperature is above 50°F (10°C).
202 Maintenance
2014 Econoline (eco)
Owners Guide gf, 1st Printing, November 2012
USA (fus)