1996 W140 S420 Sensor Values...
1 In vehicle Temp Sensor w/ Aspirator Fan
2 Outside Temp Sensor
3 (1) left Heater Core Temp Sensor
4 Right Heater Core Temp Sensor
5 Evaporator Temp Sensor
6 (1) Coolant Temp Sensor (Climate Control)
7 Coolant Pressure (06 = 6 Bar)
8 refrigerant temp Sensor
10 Blower Control Voltage
11 Emissions Sensor Voltage
12 Sun Sensor Voltage
20 Current for Aux Fan in Milliamps
21 Engine Speed in RPM
22 Vehicle Speed K/Hr
23 (2) Battery Voltage at Terminal 58D in Percent
24 Battery voltage
30 Left Heater Core Temp. Sensor
31 Right Heater Core Temp Sensor
32 Rear Evaporator Temp Sensor
33 Rear Blower Voltage
34 Left Rear Temp Sensor
35 Right Rear Temp Sensor
38 - 43 Hardware and Software Status

(1) - Display will show 2 digits, for example...104 F will be 04 F
(2) - Voltage is displayed in percentage, for example: 99.0 will be 99% Battery voltage

I have the DTCs also if anyone is interested.