Lexus RX400h2006 Owner's Manual page 39

HYBRID VEHICLE OVERVIEW
If you open the door with the hybrid system turned on and
the transmission is not in the "P" position, a message
appears on the multi−information display and navigation
system screen (for vehicles with navigation system).
D When you leave your vehicle, or stop or park for a while, put
the transmission in the "P" position.
D Charging the traction battery while driving is important. In
the "N" position, the traction battery will not be charged. Do
not leave the transmission in the "N" position. The motor
generator operates in the "P", "R", "D" and "B" positions.
When you drive, put the transmission in the "D" or "B"
position and depress the accelerator pedal. When driving in
a traffic jam, operate the vehicle in the "D" position to prevent
the traction battery from being discharged.
12
" Traction battery air vents
Air vents are located under the rear seats to cool the
traction battery. If the vents are covered, the battery will
overheat resulting in reduced output performance of the
hybrid system.
You may hear the noise of the cooling fans from the air vents.