Michael,
The CSV is only activated during cranking, and the total length of activation varies with temperature, from not at all (engine hot) to 12 seconds (engine very cold). Time is controlled by the TTS. The time is additive, so if the temp will allow for, say, 4 seconds of activation, then 2 cranks of 2 seconds each will use up the 4 seconds and it won't activate again until the TTS has cooled back down.
The above assumes the car does not have the 1 second relay. If the 1 second relay is there, the CSV will always activate for at least 1 second during cranking, even if the TTS is timed or temperatured out.
Hope that helps. Don't know about the CSS.
George Davis
'69 280 SL Euro manual