I noticed yesterday an orange liquid dripping and coming out from the engine. No clue what is and don't remember ever having such a problem with my A4. I attached some pictures for reference. I have 2007 A4 2.0T Quattro.
Any idea what it could be and if it would be safe to drive

Thanks!

 

Looks like dried deposits of leaking antifreeze coming from around the o-ring on that temp sensor.. Or the plastic housing may have a small crack in it. Check the coolant level in the fill tank. I'd get that o-ring replaced or just replace the whole sensor. $20 for the sensor (sometime less) but depending on the orientation, replacing it may cause some air being introduced into the coolant system and it will need to be bled.


HTH,
Dave