Usually caused by leak in heater coil.
for my 2002 boxster (not a sport) there is an unmarked raising/lowering switch on the drivers side near the floor close to the clutch pedal. hope that helps.
The 2010 Porsche Cayenne has .
The 2010 Porsche Panamera has .
Place a white towel on the floor of the car if when you press it down on there and the liquid is green its coolant leaking into your car it could be coming from a hose or your heater core
it will have black and white lines on the floor AND big flashing yellow balls on black and white sticks :L!
Various ways: 1 - press the longest of the three linear buttons on the remote control and hold it for two seconds; 2 - if the car is unlocked look at floor level just inside the driver's door - there is a lever to the rear end of the door sill that you lift up (the lever at the front end opens the bonnet/hood); 3 - if you have a handbook read it for emergency opening procedures; 4 - if you're in trouble because none of these works, talk to a dealer
From your AC condensation tube..it's cloggd.
I've been encountering this same problem in my Chevy S-10. I've come to the conclusion that it is coming from the air conditioning unit.
The Porsche 996 emergency hood release is located on the floor, next to the drivers seat. The hood release will be on the left-hand side of the drivers seat.
When you experience water on the mat of your car and there are no holes in the floor, very often the water is coming for a leaky windshield or door. After drying the driver's side with paper towels and a squeegy, the leak from a windshield can be confirmed by spraying water from a garden hose onto the windshield and seeing if the water reappears in the floor mat. If no water appears then you will need to check the rubber seals around the door. Two other possible sources - 1. floor vents of the heating and cooling system, or 2. a skylight when the rubber seal has dried out, however you should see moisture in the ceiling liner.
If it is coming from the tank: NO. If it coming from the bowl: YES!
Heat is coming from the engine.