New Acc Temp Sensor/Selector Wheel/Vacuum System (83/39)
Publication date: 1983-08-01Reference number: 83/39
NEW ACC TEMP SENSOR/SELECTOR WHEEL/VACUUM SYSTEM
TECHNICAL SERVICE BULLETIN
A. MODIFIED TEMPERATURE SELECTOR WHEEL AND MODIFIED TEMPERATURE SENSOR
B. MODIFIED VACUUM SYSTEM - MODELS 107, 123 AND 126 WITH AUTOMATIC CLIMATE CONTROL
Model(s): All Mercedes Benz Models (except 190 Series)
Group: Climate Control
Bulletin No.: 83/39
Date: August, 1983
SERVICE INFORMATION
A. MODIFIED TEMPERATURE SELECTOR WHEEL AND MODIFIED TEMPERATURE SENSOR (240D)
Since August 1982, a modified temperature selector wheel and temperature sensor has been installed in Model 240D.
| MODEL | AS OF CHASSIS END NO. |
|---|---|
| 240D | 359439 |
The previous version had the compensating resistor in the sensor's 2-pin plug. The modified version has the resistance integrated in the selector wheel.
The previous and modified version wheels and sensors are not interchangeable. In case of repairs on older vehicles, both the modified version wheel and sensor must be installed together.
| PART NAME | PART NUMBER |
|---|---|
| Temperature | 126 820 05 10 (Previous version) |
| selector wheel | 123 820 19 10 (Modified version) |
| Temperature | 123 830 03 72 (Previous version) |
| sensor | 123 830 06 72 (Modified version) |
B. MODIFIED VACUUM SYSTEM MODEL 107,123 AND 126 WITH AUTOMATIC CLIMATE CONTROL
Model 107 (Fig 1 )
Since August 1982, the restrictors for the main and center air flap vacuum elements are located upstream of the respective switch-over valves (14 and 16).
Model 123 (Fig 2 )
Since May 1982 (Oct. 1'88 for 13.193), the restrictor for the center flap vacuum element is located upstream of the switch-over valve (13). An additional restrictor is also installed upstream of the vacuum element (41) for the fresh air/recirculating air flap, to provide a smooth transition from fresh air to recirculating air.
Model 126 (Fig 3 )
Since May 1982, the restrictor for the center flap vacuum element is located upstream of the switch-over valve (1,). In addition, the restrictor for the diverter flap vacuum element is located upstream of the switch-over valve (18) to permit the diverter flap to open smoothly, and; the restrictor for the fresh air/recirculating air flap vacuum element has been moved closer to the switch-over valve (17) to assure that the flap operates smoothly over its entire travel.