Lexus GS430 User Manual page 386

STARTING AND DRIVING
G31024
" 1 Brake pedal
2 "D" (Drive) position
4. With your foot holding down the brake pedal, shift the
selector lever to "D".
Always use the "D" position to improve fuel economy and quiet
driving. Shifting into the overdrive gear is possible when the
transmission is in any position of "D", "6" (six range), "5" (fifth
range) of "S" position. However, while the engine coolant
temperature is low, the transmission will not shift into the
overdrive gear even in the above specified position. (See "(c)
Using engine braking" and "(f) Good driving practice" for
exceptions.)
CAUTION
Never put your foot on the accelerator pedal while
shifting.
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5. Release the parking brake and brake pedal. Depress
the accelerator pedal slowly for smooth starting.
In normal cruising, the vehicle will start in first gear and
automatically shift up to the most suitable gear. On inclines,
declines or winding roads, etc., the vehicle shifts up and down
automatically according to the running conditions to obtain the
suitable driving power and engine braking.
If you need to accelerate rapidly while driving, depress the
accelerator pedal to the full throttle position. This provides
more acceleration by automatically downshifting the
transmission to the next lower gear or beyond, depending on
the vehicle speed.
If engine braking is needed, such as in descending a long hill,
see "(c) Using engine braking".