Hi all. I just bought a 09 W204 C220 CDI with 94.000 miles. I am getting an error message when try to activate the cruise control saying "cruise control and speedtronic inoperative". If i press the speedtronic handle, the yellow light comes on but nothing happens. Its just when i push the cruise control either way that i get that error and the cruise control does not work. I dont have any other errors displaying, and i also checked the the ESP was working and turned on. Dont have any brake lights faulty (as I read somewhere that could be the problem). I read that the tyres could be the problem. I have check the tyres and the front ones are 225-45-r17 and the back ones are 245-45-r17 (i think they should be 245-40-r17). Also the back tyres, they are both different and from different brands. I would really use your help on figuing out what the problem could be... Thanks!!!