i have a similar problem ... on 2001 Mercedes-Benz C320

hi , i have a merc c320 cdi w204 2008 model , the aircon only blows hot air .. i have already re-gased and did a diagnotic problems found .. however i read that the sensor switch may be locked .. if this is the case can you please advise on how to release it cause a computer reset did not reset it . i think its the one below the radiator

Asked by for the 2001 Mercedes-Benz C320
Yeah ,it might be below radiator..