Cruise Control Amplifier - Interchange Models
 

The vehicles are W124 300E models. This could extend to all cars that use the 103 engine.
I have found a few CCA for 1987, 88, 89 and 90 over the internet. The serial #'s vary slightly.
For example:
003-545-0832 or 003-545-0932
The pins and case look exactly the same.
I am trying to find out from what years and models could I use in my car, (1986 300E).
Does anyone have any information regarding this subject?
Comments welcome.