Water in the Driver side 2003 VW Jetta

It may also be the temperature sensor.
Not knowing your model, if it uses both a belt driven and electric fan, the electric fan (or its sensor) may have failed.
Turn on the AC to see if the electric fan will cycle as it should since this is used (in most vehicles) for engine cooling if the main fan isn't adequate whether AC is in use or not.
On high mileage engines if distilled water was not used instead of tap water (along with coolant), the radiator core can eventually become clogged with calcium deposits. .

sounds like your ac drain is plugged up and condensate from evaporator core is leaking inside

Hi!!
The Fuse Box on the passenger compartment is located on the driver' side end of the Instrument Panel. To remove the cover just insert a flat screwdriver or similar tool to pop the cover. See the following pictures.

Maybe someone was a bit to energetic opening the fuel door

They are not designed to open from the outside. Why can't you get inside?

well if the cable snapped you will need to try to get the front grill to pop out with out breaking it and look up and in to get to the little latch for the hood release.

There's a hood release lever inside your Jetta by your left knee. Pull this lever to partially release the hood. Then reach your hand under the front center portion of your hood to locate the external hood release lever. pull on this lever to fully release the hood. Two (2) separate hood release levers in two different locations.

Hi, yes,remove all ignition coils and spark plugs and clean off water.

Th cowling let in fresh air for the heateer and defroster, Their is a drain in the bottom of the cowling or heater ductwork which allows the water to escape before going into the car. I woudl gues that the drain is stopped up..

Were is the dome light on a vw jetta 2003