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I just bought my 2001 slk320, I got it for a really good deal. I had a problem with the car not wanting to start, after replacing the CPS it works just fine but now every time it starts the fans run at high speed. Its very load, has anyone had this problem? I've been searching online and they said it could be the temperature sensor. Please confirm if this could fix my problem.
 

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mmm. Also a symptom of other things.
Why was the CPS replaced? Was the ECU checked at the time and given a clean bill of health?
Fans suddenly running fast can be a symptom of the MAF and if not the MAF, then the ECM. The ECM controls the fuel flow and might just need resetting, or often, it is claimed that they are sent awry with a build up of pressure in the fuel tank. Take off your fuel cap - is there a 'whoosh' as you undo the seal?
 
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