Lexus RX330 2005 Owner's Manual page 411

STARTING AND DRIVING
" The shift position is displayed on the instrument
cluster.
P: Parking, engine starting and key removal position
R: Reverse position
N: Neutral position
D: Normal driving position (Shifting into overdrive possible)
4: Position for engine braking (Shifting into overdrive not
possible)
Vehicle with the cruise control —
When the cruise control is being used, even if you
downshift from "D" to "4", engine braking will not be
enabled because the cruise control is not cancelled. For
vehicle speed reduction, see page 414.
Vehicle with the dynamic laser cruise control —
When the cruise control is being used in the
conventional (fixed speed) cruise control mode or in the
vehicle−to−vehicle distance control mode, even if you
downshift from "D" to "4", engine braking will not be
enabled because the cruise control is not cancelled. For
vehicle speed reduction, see pages 426 and 435.
3, 2: Position for more powerful engine braking
L: Position for maximum engine braking
390
Correct use of the automatic transmission is explained in
the following parts.
(a) Normal driving
(b) Using engine braking
(c) Using the "3", "2" and "L" positions
(d) Backing up
(e) Parking
(f) Good driving practice
(g) If you cannot shift the selector lever
(h) Driving in snow mode