Jeep 2009 Commander - Manual (Page 78)

Lights
Have someone observe the operation of all exterior lights
while you work the controls. Check turn signal and high
beam indicator lights on the instrument panel. Fluid Leaks
Check the area under the vehicle after overnight parking
for fuel, coolant, oil or other fluid leaks. Also, if gasoline
fumes are detected, the cause should be located and
corrected immediately.
76 THINGS TO KNOW BEFORE STARTING YOUR VEHICLE