a question to the spec ́s

There are v8ter 3,6 and 4,2 ltr. switch and automatic, with servotronics and without, question : are the combiinstr. all the same ? There are differences between switches and automatics. 3.6 and 4.2 ...servotronics and none.
with my v8ter,4,2 ltr., automatic greiebe,servotronics,is there an indicator (light) of the servotronics above the temperature indicator,are these present with all combi instruments?
Cu wolfgang :-)