My 300E engine can never reach 80*C on the highway. It can in the city. With the engine not running the fan can still move. But when the engine is running it seems to run at the same speed. I notice that there is no electrical connection to the fan.

Is my engine running too cold? Is the fan clutch activated by electricity? If so then how can I test whether the clutch is still working and how to get its correct connection wire?