Leaning Left shows "Malfunction"

  mercedes/gl-class/2007-2012

 Air suspension problem, I changed the left front air springs (strut), replaced everything correctly...started vehicle went thought proper procedures, the left front air springs never adjusted to correct height. Have tried to use a friends Star diagnostic to manual  calibrate was able to communicate with all air springs except The Front Left One. the compressor still pumps (i have let the air out of the right front spring it inflates properly). 

Don't know where to go next to Check the  Height adjusting sensor or or Valve Block

How do you check the Height adjusting sensor

 

35