Temp Gauge on 1.9TDi A4

[necroeire]

My temperature gauge after driver a few minutes drops to 50 and stays there for the entire journey. Happens regularly now even though the car is running fine.
Can anyone tell me where the connector for this sensor is so I can check it?

 

[necroeire]

Just serviced it and got it repaired. No idea what was the fault.