2003 Mercedes Benz SLK32FACTORY OEM SERVICE PROCEDURE

ME-SFI two-sensor control function - GF07.61-P-3020F

ENGINE 104.941 /943 /944 /991 /994 as of 1.8.96 with CODE (494a) USA version 

ENGINE 104.995 with CODE (494a) USA version 

ENGINE 111.921 /942 as of 1.9.98, 111.943, 111.944 as of 1.8.96, 111.946 as of 1.6.98, 111.947 /973, 111.975 as of 1.8.96 with CODE (494a) USA version 

ENGINE 111.945 in MODEL 202.020 /080 as of 1.9.98, 208.335 /435 as of 1.6.98 with CODE (494a) USA version 

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

ENGINE 111.974, 112.970 /972 with CODE (494a) USA version 

ENGINE 112.910 /911 /912 /913 /914 /916 /917 /920 /921 /922 /923 /940 /941 /942 /943 /944 /946 /947 /949 /953 /954 /955 /973 /975 with CODE (925) low emission EURO3 with CODE (926) low emission EURO4 with CODE (494a) USA version 

ENGINE 113.940 /941 /942 /943 /948 /960 /961 /963 /965 /966 /967 /968 /969 with CODE (925) low emission EURO3 with CODE (926) low emission EURO4 with CODE (494a) USA version 

ENGINE 119.980/981 /982 /985 with CODE (494a) USA version 

ENGINE 120.982 /983 with CODE (494a) USA version 

ENGINE 137.970 

Task 

  • Improving the stability of the lambda control.
  • Monitoring the O2 sensor upstream of TWC
    Fig 1: ME-SFI Two-Sensor Control Function Diagram
    G04738357
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.