Car will not pick up on heat for most drives.There have been several times when ACC seemed to work. Under most circumstances it blows air at a temperature warmer than outside air, but not warm enough to heat the car. If you shut down the engine and restart in a few minutes you will get a little warm air,then back to the slightly warm air. Looks to me that something is stuck and will not pass the warm water to the heater coil. No click when you go from max to min as in my 300D. Does the 126 body use the mono valve also?? Would sure appreciate some help on this.