coolant light
 

HI
I have a 2002 1.8T gas jetta.My coolant light comes on when I start the engine, then goes out when the engine gets warm and wont come on again untill the next morning. The manual says the fluid level is too low, but the level indicator in the add container is in the correct area. I have heard that vw has lots of electrical issues and it might be a sensor and not the level of the coolant?