Hi upgraded the climate control in my 2007 c230 some time ago all worked fine but after letting the battery go flat air is no longer being directed to the windscreen tried the reset can hear the actuators move and with the fan speed hi air is being directed to the screen and all other vents in term reset dosent stop think this is normal because missing sensors and so Does any one know how to pull the fault codes tried holding the rest ect button for five seconds and display flashes 0 to the left and 22 to the right can any one give me any more information thanks