Cooling Fan

[Ezione2]

can anybody help the cooling fan on my 2018 SL400 keeps running at high speed even though the temperature display reads 90 degrees or so

 

[john campbell]

Try turning off the A/C and see if it stops............ When using the Aircon the fan will run off and on or sometimes on for a long period.

 

[Ezione2]

HI. I tried turning the AC off but still the same. when I start the car the fan starts to run fast within 10 secs or so of starting when cold

 

[john campbell]

Next step is a diagnostic computer to read what the temp sensor is reading..........