My electric auxiliary fans are always on whenever I turn my car on, or even when I turn my key halfway in the ignition. I checked it out and everything seems to be working fine. The relays are fine; I tried changing those. What are other possibilities that could be causing this? Anyone had this happen to them?

My Mercedes is a 190e 2.6 year 1989.

My sound system is not working and occasionally my battery turns off when I am driving because the fans are requiring constant power. So I WOULD LIKE TO FIX THIS! :-(