There is an ad for a 95 Mercedes S600 coupe for sale and it states that it was involved in a theft where the computer modules where stolen. It does not run because of this. Does anyone know what they refer to?

It means the car has lost the engine computer,which makes the car run and operates,like us human has no brain.
I would stay away from it,it is not as simple as plug in another one will make it works,there is programming,codings....Worse yet,when thief steals these,they cut wiring harness,that is a huge problem,worse than getting the computer itself.