Hello, i am having a time trying to get the hvac controls on my 2000 slk230 working. i bought the car as a project and had to switch the ecm and immobilizer just to get it to run. i was wondering if this hvac controls have to be programmed to the ecm . i have did all the usual maintenance on the heater blower motor, such as take apart ,clean,lubricate and replaced resistor. when i had it out i ran voltage from battery direct and it works. i am getting power on middle pin, but the fan speed button does nothing and the flapper setting dont work either. thanks in advance for any help.