My fans come on at 215, right about where the service manual says they should.
BTW, an S4 cannot be left running stationary for long periods of time. It WILL overheat, the stock fans are too puny to push enough air to control the temp.
Found that out doing a battery temp experiment. Coolant temp was at 250 and climbing steady after 30 minutes of running while stationary.
The bike doesn't have to move much to control the temp, though. Even pretty severe stop'n'go with air temp at 105, it can handle it. The rider was a little worse for wear after that one.........