
2193-5. Opening, closing the windows and moon roof
3
Operation of each component
GS450h_300h_OM_OM30D53E_(EE)
The moon roof can be operated when
The power switch is in ON mode.
Operating the moon roof after turning the hybrid system off
The moon roof can be operated for approximately 45 seconds after the power
switch is turned to ACCESSORY mode or turned off. It cannot, however, be
operated once either front door is opened.
Jam protection function
If an object is detected between the moon roof and the frame while the moon
roof is closing or tilting down, travel is stopped and the moon roof opens
slightly.
Sunshade
The sunshade can be opened and closed manually. However, the sunshade
will open automatically when the moon roof is opened.
Door lock linked moon roof operation
The moon roof can be opened and closed using the mechanical key.* (P.
908)
The moon roof can be opened and closed using the wireless remote con-
trol.
*
(P. 168)
*: These settings must be customized at any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.

2203-5. Opening, closing the windows and moon roof
GS450h_300h_OM_OM30D53E_(EE)
When the moon roof does not close normally
Perform the following procedure:
If the moon roof closes but then re-opens slightly
Stop the vehicle.
Press and hold the “CLOSE” switch.
*1
The moon roof will close, reopen and pause for approximately 10 sec-
onds.
*2 Then it will close again, tilt up and pause for approximately 1
second. Finally, it will tilt down, open and close.
Check to make sure that the moon roof is completely closed and then
release the switch.
If the moon roof tilts down but then tilts back up
Stop the vehicle.
Press and hold the “UP” switch
*1 until the moon roof moves into the tilt
up position and stops.
Release the “UP” switch once and then press and hold the “UP” switch
again.
*1
The moon roof will pause for approximately 10 seconds in the tilt up
position.
*2 Then it will adjust slightly and pause for approximately 1
second. Finally, it will tilt down, open and close.
Check to make sure that the moon roof is completely closed and then
release the switch.
*1: If the switch is released at the incorrect time, the procedure will have to
be performed again from the beginning.
*2: If the switch is released after the above mentioned 10 second pause,
automatic operation will be disabled. In that case, press and hold the
“CLOSE” or “UP” switch, and the moon roof will tilt up and pause for
approximately 1 second. Then it will tilt down, open and close. Check to
make sure that the moon roof is completely closed and then release the
switch.
If the moon roof does not fully close even after performing the above proce-
dure correctly, have the vehicle inspected by any authorized Lexus dealer or
repairer, or another duly qualified and equipped professional.
1
2
3
1
2
3
4

223
4Driving
GS450h_300h_OM_OM30D53E_(EE)4-1. Before driving
Driving the vehicle............ 224
Cargo and luggage ............ 235
Trailer towing (vehicles
without towing package). 236
Trailer towing (vehicles with
towing package) .............. 237
4-2. Driving procedures
Power (ignition) switch ..... 246
EV drive mode .................. 253
Hybrid transmission .......... 256
Turn signal lever ............... 264
Parking brake .................... 266
Brake Hold ........................ 269
Horn .................................. 271
4-3. Operating the lights
and wipers
Headlight switch............... 272
Automatic High Beam ...... 277
Fog light switch ................ 283
Windshield wipers
and washer ...................... 285
Headlight cleaner switch ... 292
4-4. Refueling
Opening the fuel tank cap . 2934-5. Using the driving support
systems
Cruise control ................... 298
Dynamic radar cruise
control ............................. 302
Dynamic radar cruise control
with full-speed range ...... 318
LKA
(Lane-Keeping Assist) .... 335
Lexus
parking assist-sensor....... 345
Lexus
parking assist monitor..... 358
Driving mode select
switch.............................. 388
Driving assist systems ...... 393
PCS (Pre-Crash
Safety system) ................ 402
BSM (Blind Spot Monitor) 414
• The Blind Spot Monitor
function......................... 420
• The Rear Crossing Traffic
Alert function ............... 423
Lexus night view .............. 426
4-6. Driving tips
Hybrid vehicle driving tips 432
Winter driving tips ............ 434

2274-1. Before driving
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Drum-in-disc type parking brake system
Your vehicle has a drum-in-disc type parking brake system. This type of
brake system needs bedding-down of the brake shoes periodically or when-
ever the parking brake shoes and/or drum are replaced. Have any authorized
Lexus dealer or repairer, or another duly qualified and equipped professional
perform the bedding down operation.
Operating your vehicle in a foreign country
Comply with the relevant vehicle registration laws and confirm the availabil-
ity of the correct fuel. (P. 929)
For efficient use
Shift the shift lever to D when driving.
In the N position, the gasoline engine operates but electricity cannot be gen-
erated. The hybrid battery (traction battery) will discharge, requiring unnec-
essary engine power to recharge.
Drive your vehicle smoothly.
Avoid abrupt acceleration and deceleration. Gradual acceleration and decel-
eration will make more effective use of the electric motor (traction motor)
without having to use gasoline engine power.
Avoid repeated acceleration.
Repeated acceleration consumes hybrid battery (traction battery) power,
resulting in poor acceleration. Battery power can be restored by driving
with the accelerator pedal slightly released.
Shift the shift lever to P when parking.
In the N position, the hybrid battery (traction battery) does not recharge.
Leaving the shift lever in the N position for an extended period of time may
discharge the hybrid battery (traction battery). The vehicle cannot run if the
hybrid battery (traction battery) is discharged.

2284-1. Before driving
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
Observe the following precautions.
Failure to do so may result in death or serious injury.
When starting the vehicle
Always keep your foot on the brake pedal while stopped with the hybrid
system operating. This prevents the vehicle from creeping.
When driving the vehicle
Do not drive if you are unfamiliar with the location of the brake and accel-
erator pedals to avoid depressing the wrong pedal.
• Accidentally depressing the accelerator pedal instead of the brake pedal
will result in sudden acceleration that may lead to an accident.
• When backing up, you may twist your body around, leading to a diffi-
culty in operating the pedals. Make sure to operate the pedals properly.
• Make sure to keep a correct driving posture even when moving the
vehicle only slightly. This allows you to depress the brake and acceler-
ator pedals properly.
• Depress the brake pedal using your right foot. Depressing the brake
pedal using your left foot may delay response in an emergency, result-
ing in an accident.
The driver should pay extra attention to pedestrians when the vehicle is
powered only by the electric motor (traction motor). Because there is no
engine noise, the pedestrians may misjudge the vehicle’s movement.
Do not drive the vehicle over or stop the vehicle near flammable materi-
als.
The exhaust system and exhaust gases can be extremely hot. These hot
parts may cause a fire if there is any flammable material nearby.

2324-1. Before driving
GS450h_300h_OM_OM30D53E_(EE)
CAUTION
When the vehicle is parked
Do not leave glasses, cigarette lighters, spray cans, or soft drink cans in
the vehicle when it is in the sun.
Doing so may result in the following:
• Gas may leak from a cigarette lighter or spray can, and may lead to a
fire.
• The temperature inside the vehicle may cause the plastic lenses and
plastic material of glasses to deform or crack.
• Soft drink cans may fracture, causing the contents to spray over the
interior of the vehicle, and may also cause a short circuit in the vehi-
cle’s electrical components.
Do not leave cigarette lighters in the vehicle. If a cigarette lighter is in a
place such as the glove box or on the floor, it may be lit accidentally when
luggage is loaded or the seat is adjusted, causing a fire.
Do not attach adhesive discs to the windshield or windows. Do not place
containers such as air fresheners on the instrument panel or dashboard.
Adhesive discs or containers may act as lenses, causing a fire in the vehi-
cle.
Do not leave a door or window open if the curved glass is coated with a
metallized film such as a silver-colored one. Reflected sunlight may cause
the glass to act as a lens, causing a fire.
Always apply the parking brake, shift the shift lever to P, stop the hybrid
system and lock the vehicle.
Do not leave the vehicle unattended while the hybrid system is operating.
Do not touch the exhaust pipes while the hybrid system is operating or
immediately after turning the hybrid system off.
Doing so may cause burns.

2434-1. Before driving
4
Driving
GS450h_300h_OM_OM30D53E_(EE)
Tire information
Increase the tire inflation pressure to 20.0 kPa (0.2 kgf/cm2 or bar, 3 psi)
greater than the recommended value when towing. (P. 936)
Increase the air pressure of the trailer tires in accordance with the total
trailer weight and according to the values recommended by the manufac-
turer of your trailer.
Trailer lights
Please consult at any authorized dealer or repairer, or another duly qualified
and equipped professional when installing trailer lights, as incorrect instal-
lation may cause damage to the vehicle’s lights. Please take care to comply
with your state’s laws when installing trailer lights.
Check that the turn signal lights and stoplights are operating correctly every
time you hitch up the trailer. Directly wiring up to your vehicle may damage
the electrical system and stop the lights from functioning correctly.
Break-in schedule
Lexus recommends that vehicles fitted with new power train components
should not be used for towing trailers for the first 800 km (500 miles).
Safety checks before towing
Check that the maximum load limit for the towing hitch/bracket hitch ball is
not exceeded. Bear in mind that the coupling weight of the trailer will add
to the load exerted on the vehicle. Also make sure that you will not be tow-
ing a load that exceeds the maximum permissible axle capacity.
Ensure that the trailer load is secure.
Supplementary outside rear view mirrors should be added to the vehicle if
the traffic behind cannot be clearly seen with standard mirrors. Adjust the
extending arms of these mirrors on both sides of the vehicle so that they
always provide maximum visibility of the road behind.
Maintenance
Maintenance must be performed more frequently when using the vehicle
for towing due to the greater weight burden placed on the vehicle compared
to normal driving.
Retighten all bolts securing the hitching ball and bracket after towing for
approximately 1000 km (600 miles).

2444-1. Before driving
GS450h_300h_OM_OM30D53E_(EE)
Your vehicle will handle differently when towing a trailer. In order
to avoid accident, death or serious injury, keep the following in
mind when towing:
Checking connections between trailer and lights
Stop the vehicle and check the operation of the connection
between the trailer and lights after driving for a brief period as
well as before starting off.
Practicing driving with a coupled trailer
Get the feel for turning, stopping and reversing with the trailer
coupled by practicing in an area with no or light traffic.
When reversing with a coupled trailer, hold the section of the
steering wheel nearest to you and rotate clockwise to turn the
trailer left or counterclockwise to turn it right. Always rotate a
little at a time to prevent steering error. Have someone guide
you when reversing to lessen the risk of an accident.
NOTICE
When the rear bumper strengthening material is aluminum
Ensure the steel bracket part does not come directly in contact with that
area.
When steel and aluminum come into contact, there is a reaction similar to
corrosion, which will weaken the section concerned and may result in dam-
age. Apply a rust inhibitor to parts that will come in contact when attaching
a steel bracket.
Guidance