Easy to operate...

Easy to operate , works fast and also has its limitations , I had/have an EHC problem on my BMW 530D E39 touring , according to device there are no errors in it , however I keep getting the messages that the level control is inactive . With the device I could sit that there is voltage difference in the left and right level sensor , the limitation I then experience is that I can not start the compressor with the device to see if the start circuit is ok or that I have a combined complaint , and level sensor and eg EHC module , this will be possible with the more expensive OBD devices that the garages use . Still I am very satisfied with the device because I could find out more what is going on now .