Make sure you check your references in installing that resistor. Early 140s have an independent temp sensor for the auxiliary fans. Late 140s share the temp sensor between the fans and the ECU. The fans will come on sooner but the ECU will be working off erroneous information. Make sure such is not the case with your car.
Sixto
95 S420
91 300SE
87 300SDL
83 300SD
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