Your Lexus Dealer has access to a customisation tool that allows you to change many of the settings of your car.

These are known as the C-Best settings, and are shown below in tabular form


<table width="100%" border="1">
<tr>
<td><div align="center"><strong>Category</strong></div></td>
<td><div align="center"><strong>Item Select</strong></div></td>
<td><div align="center"><strong>Default</strong></div></td>
<td><div align="center"><strong>Description</strong></div></td>
<td><div align="center"><strong>Options</strong></div></td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>OPEN DOOR WARNING</td>
<td>ON</td>
<td>ON / OFF of 10 second buzzer if door is open when locking with wireless
transmitter</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>WIRELESS BUZZ VOLUME</td>
<td>MID2</td>
<td>Adjusts the volume of the wireless buzzer</td>
<td>OFF / MIN / MID1 / MID2 / MID3 / MAX</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>WIRELESS OPERATION</td>
<td>ON</td>
<td>ON / OFF of the wireless door lock function</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>CAR FINDER</td>
<td>ON</td>
<td>ON / OFF of the car finder function which lights up all turn signal lights
once when lock button is pressed on transmitter while vehicle doors are
locked and closed</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>ALARM FUNCTION</td>
<td>ON</td>
<td>ON / OFF of panic function if transmitter button is pressed for 1.5 seconds</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>INT / LGT ON / UNLOCK</td>
<td>ON</td>
<td>ON / OFF of interior lights when vehicle is unlocked with transmitter</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>UNLOCK / 2 OPER</td>
<td>ON</td>
<td><p>ON Pressing transmitter unlock button once will unlock drivers door
pressing<br>
twice will unlock all doors</p>
<p>OFF Pressing transmitter button once makes all doors unlock.</p></td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>TRUNK LID OPER</td>
<td>0.8PR</td>
<td>OFF Transmitter will not open trunk<br>
0.8PR Trunk button must be pressed for 0.8 seconds-to open trunk <br>
1TIME Trunk button must be pressed once to open trunk<br>
2TIME Trunk button must be pressed twice to open trunk</td>
<td>OFF / 0.8PR / 1TIME / 2TIME</td>
</tr>
<tr align="left" valign="top">
<td>Wireless Door Lock</td>
<td>AUTO LOCK DELAY</td>
<td>30S</td>
<td>After the vehicle is unlocked with the transmitter vehicle will lock if
a door is<br>
not opened before the specified time (30 or 60 seconds)</td>
<td>30S / 60S</td>
</tr>
<tr align="left" valign="top">
<td>Door Lock</td>
<td>UNLOCK/PARK</td>
<td>OFF</td>
<td>ON / OFF of door auto unlock when vehicle is stopped and shifted into
Park</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Door Lock</td>
<td>ALL UNLOCK / OPN-CL</td>
<td>OFF</td>
<td>ON / OFF of door auto unlock for all doors when drivers door opens within
10 seconds<br>
of turning the ignition key from ON to OFF</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Door Lock</td>
<td>UNLOCK / KEY TWICE</td>
<td>ON</td>
<td><p>ON When unlocking the drivers door one turn of the key will unlock
drivers<br>
door only two turns will unlock all doors<br>
OFF When unlocking drivers door one turn will unlock all doors </p></td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Door Lock</td>
<td>ANSWER BACK</td>
<td>HAZARD</td>
<td>HAZARD: Hazard lights will blink once when transmitter is used to lock
vehicle<br>
and twice when unlocking the vehicle providing the doors hood and trunk
are dosed.<br>
OFF: Hazard lights will not blink </td>
<td>HAZARD / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Security</td>
<td>PASSIVE MODE</td>
<td>OFF</td>
<td>ON / OFF of automatic activation of the security system 30 seconds after
key is<br>
removed from ignition and doors are dosed. Upon reentry driver has 15 seconds<br>
to:<br>
1) insert key into the ignition front door or trunk<br>
2) use transmitter to open vehicle </td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Security</td>
<td>UP / DOOR KEY</td>
<td>ON</td>
<td>ON / OFF: Windows will roll up when key is locking drivers door and<br>
held for 1.5 seconds with the ignition off</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Power Window</td>
<td>DOWN / DOOR KEY</td>
<td>ON</td>
<td>ON / OFF: Windows will roll down when key is unlocking drivers door and<br>
held for 1.5 seconds with the ignition off</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Power Window</td>
<td>DOWN / WIRELESS</td>
<td>ON</td>
<td>ON / OFF: Windows will roll down when transmitter unlock button is held<br>
for 1.5 seconds with the ignition off</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Illuminated Entry</td>
<td>LIGHTING TIME</td>
<td>15S</td>
<td>Delay of interior light dimming function.<br>
Interior lights will dim quickly if ignition is ON</td>
<td>7.5S / 15S / 30S</td>
</tr>
<tr align="left" valign="top">
<td>Illuminated Entry</td>
<td>I/L ON / UNLOCK</td>
<td>ON</td>
<td>ON / OFF of interior light up when unlocking door using door lock cylinder.<br>
Regardless of this setting interior lights will still light up when interior<br>
light switch is in the door position and door is opened.</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Warning</td>
<td>LIGHT REMIND</td>
<td>OFF</td>
<td>ON / OFF of headlight reminder buzzer</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Warning</td>
<td>KEY REMIND SOUND</td>
<td>NORMAL</td>
<td>Frequency of key reminder buzzer</td>
<td>LOW / NORMAL / HIGH</td>
</tr>
<tr align="left" valign="top">
<td>Warning</td>
<td>KEY REMIND VOLUME</td>
<td>LARGE</td>
<td>Volume of key reminder buzzer</td>
<td>SMALL / MEDIUM / LARGE</td>
</tr>
<tr align="left" valign="top">
<td>Warning</td>
<td>LIGHT OFF DELAY</td>
<td>30S</td>
<td>Delay time for headlight turnoff to specified setting</td>
<td>OFF / 30S / 60S / 90S</td>
</tr>
<tr align="left" valign="top">
<td>Warning</td>
<td>LIGHT CTRL TYPE</td>
<td>CURRENT</td>
<td>OLD : 6 second automatic headlight ON delay 8 second headlight OFF delay<br>
CURRENT: 15 second delay for automatic headlight ON or OFF</td>
<td>CURRENT / OLD</td>
</tr>
<tr align="left" valign="top">
<td>Light Control</td>
<td>SENSITIVITY</td>
<td>NORMAL</td>
<td>Adjusts the sensitivity of the automatic headlight illumination system</td>
<td>DARK2 / DARK1 / NORMAL / LIGHT1 / LIGHT2</td>
</tr>
<tr align="left" valign="top">
<td>Light Control</td>
<td>DISP EX ON SEN</td>
<td>NORMAL</td>
<td>Adjusts the brightness of indicator lights (Shift Taillight Headlight
Cruise<br>
and Power Mode indicators) when headlights are ON</td>
<td>DARK2 / DARK1 / NORMAL / LIGHT1 / LIGHT2</td>
</tr>
<tr align="left" valign="top">
<td>Light Control</td>
<td>DISP EX OFF SEN</td>
<td>NORMAL</td>
<td>Adjusts the brightness of indicator lights (Shift Taillight Headlight
Cruise<br>
and Power Mode indicators) when headlights are OFF</td>
<td>DARK2 / DARK1 / NORMAL / LIGHT1 / LIGHT2</td>
</tr>
<tr align="left" valign="top">
<td>Tilt &amp; Telescope</td>
<td>AUTO TILT AWAY</td>
<td>ON</td>
<td>ON / OFF of auto away/return function</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Sliding Roof</td>
<td>OPEN / DOOR KEY</td>
<td>ON</td>
<td>Links sliding roof to DOWN / DOOR KEY function when door is unlocked for
1.5 seconds</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Sliding Roof</td>
<td>CLOSE / DOOR KEY</td>
<td>ON</td>
<td>Links sliding roof to UP / DOOR KEY function when door is locked for 1.5
seconds</td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Sliding Roof</td>
<td>OPEN / WIRELESS</td>
<td>ON</td>
<td>Links sliding roof to DOWN / WIRELESS function when transmitter unlock<br>
button is pressed tor 1.5 seconds </td>
<td>ON / OFF</td>
</tr>
<tr align="left" valign="top">
<td>Sliding Roof</td>
<td>DOOR KEYOPER</td>
<td>SLIDE</td>
<td>Changes operation of sliding roof when using key to open or close roof
</td>
<td>SLIDE / TILT</td>
</tr>
<tr align="left" valign="top">
<td>Sliding Roof</td>
<td>WIRELESS OPER</td>
<td>SLIDE</td>
<td>Changes operation of sliding roof when using transmitter to open roof
</td>
<td>SLIDE / TILT</td>
</tr>
<tr align="left" valign="top">
<td>Air Conditioner </td>
<td>AIR INLET MODE </td>
<td>AUTO </td>
<td>AUTO : Will automatically change air inlet to RECIRCULATE when A/C is
turned ON<br>
MANUAL: Will not change air inlet when A/C is turned ON </td>
<td>AUTO / MANUAL</td>
</tr>
<tr align="left" valign="top">
<td>Air Conditioner </td>
<td>COMPRESSOR MODE </td>
<td>AUTO </td>
<td>AUTO : Will automatically turn ON A/C if AUTO button is pressed when blower
is ON<br>
MANUAL: Driver must turn ON the A/C when Auto button is pressed </td>
<td>AUTO / MANUAL</td>
</tr>
<tr align="left" valign="top">
<td>Air Conditioner </td>
<td>COMPRS / DEF OPER </td>
<td>LINK </td>
<td>Link : A/C will turn ON when Defroster is ON<br>
NORMAL: A/C must be manually activated when Defroster is turned ON </td>
<td>LINK / NORMAL</td>
</tr>
<tr align="left" valign="top">
<td>Air Conditioner </td>
<td>AIR INLET OPER </td>
<td>LINK </td>
<td>Link: In the event of A/C malfunction air inlet will change to OUTSIDE.<br>
NORMAL: Air inlet will not change. </td>
<td>LINK / NORMAL</td>
</tr>
</table>


If case it is needed, here are scans of the Technical Service Informational Bulletin released by Lexus on 22/06/2001