Air conditioner problem in CLK200-2009

  mercedes/clk-class/2003-2009

Hi everyone,
I have a CLK200 and I noticed recently that the A/C run with its own or it will remain running after turning it own. Also, sometimes I hear a noise when I turn the A/C on, like an old fan noise and once I press on the gas pedal it goes.
Anyone has any idea about these issues?

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