According to Real OEM that's an expensive relay that is described as being "For deactivating electric fan...". This is a odd wording for a relay. Most relays 'control' something. IOW when power is applied to them they turn on something (e.g. often called a normally off relay). It sounds like this relay does the opposite. When power is applied to the relay, it deactivates the electric fan (i.e. it is normally on). If that is the case, there must be some other switch/relay that 'activates' the fan when the engine is running.

Funf Dreisig

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