Hi All, I have a 2010 W204 C200 Cdi with the OM646 engine. It has recently started to get hot when in stationary traffic but the engine cooling fan fails to kick in. The temperature gauge went to around 100 then I got a warning symbol in the multi function display, the symbol I got points to a fault with the electronic cooling fan according to my hand book, rather than an overheating error symbol. I have checked the coolant and all is good. I am assuming it could be a fault with either the sensor which brings the cooling fan on or the fan itself which is faulty? Can anybody advise any checks I can carry out before taking it to the main dealer? I am able to check voltages & resistances if anybody can point me in the right direction and the location of the components? Thanks in advance.