Hi guys

Owned my 2017 162 Superb for 2 years and I've never had this issue. Started it up tonight to move it into the driveway and a loud fan noise fired up from directly behind the lower front grille. Moved the car turned it off and the fan powered down after a couple of seconds. Started the engine again and the fan kicked in immediately. Engine temp showing cold. Climate system off. Outside temp around 15 degrees celsius. Car hadn't been driven for 3 or 4 hours prior. Any thoughts as to what's going on?