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Coolant temperature sensor position/task/design/function - GF07.04-P-5026G

ENGINES 104.941 /943 /944 /991 /994 as of 1.8.96 

ENGINE 104.995 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 with CODE (498) as of Model Year 97 Japanese version 

ENGINE 111.921 /942 as of 1.9.98, 111.943 /944, 111.946 as of 1.6.98, 111.947 /973 /977, 111.975 as of 1.8.96 

ENGINE 111.945 in MODELS 208.335 /435 as of 1.6.98, 202.020 /080 as of 1.9.98 

ENGINE 111.974 with CODE (494a) USA version with CODE (807) Model year 1997 with CODE (808) Model year 1998 

ENGINE 111.951 /952 /955 /956 /957 /958 /982 /983 

Fig 1: Identifying Coolant Temperature Sensor - 2-Pin Plug/4-Pin Plug Connection
G04623882Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
  Coolant temperature sensor position Engine 104 GF07.04-P-5026-02D 
    Engine 111 GF07.04-P-5026-02GS
  Coolant temperature sensor task Detecting the coolant temperature and supplying information to the engine control module  
  Coolant temperature sensor design Metal housing with NTC resistor. 2-pin plug connection
Contact assignment at connector:
Contacts 1 and 2 engine control module
Metal housing with two NTC resistors. 4-pin plug connection Contact assignment at connector:
Contacts 1 and 2 engine control module
Contact 3 and 4 air conditioning/ automatic air conditioning
 
  Coolant temperature sensor function The NTC resistor alters its electrical resistance in line with the coolant temperature. NTC means negative temperature coefficient, in other words the electrical resistance becomes less as the temperature rises:  
    Coolant temperature resistance  
    20°C 3100 Ω ± 5%  
    80°C 315 Ω ± 5%