Mercedes 190e w201 overheating, auxiliary fan not working. Fault finding process

My car almost over heated today but it had been ok before. Sudden overheating must be investigated so I looked at the function of the system using some symbol methods. Good luck!

[@enesgok9340]

My engine cooling fan sensor turns on at 105 degrees. The fan sensor is black and 87 degrees. It blooms at 87 degrees for 1 month. After 1 month, the 105 starts to activate the fan. BEHR brand. What do you think is the problem?

[@renzogarrido2530]

I have this exact same problem