450 Air Conditioning Drain
Water under the carpet in your fortwo?
If you have air conditioning fitted to your Fortwo, it is a good idea to check the drain pipe yearly.
The drain pipe is in a remote location away from grit and grime but it can become
detached fairly easily allowing condensed water from the AC to leak inside the car.
The best course of action is to check under your carpets regularly for any moisture.
Checking The Drain
Feel under the footwell carpets on both sides for a wet carpet backing. There is no point feeling
the visible side for wetness as the carpet is plastic backed so water won't seep through.
This was obviously designed so that water from wet shoes would soak through to the foam.
Normally the wetness will appear on the passenger side, so, pull back the carpet,
remove the polystyrene block and have a look at the centre console.
What you have is a pipe coming from the cabin heater box going to the car floorplan.
However, these have been known to pull out (seen below), come off the heater box or split.
The picture below is from a Roadster but it's similar. If you have a
picture of the fortwo AC drain, please send it over for me to add here.
The fix is reversing whatever has happened. Either reposition the drain back into the outlet hole, refit the pipe back to the heater box or replace it with a new one from smart if damaged.
What If The Drain Is OK But The Carpet Is Still Wet?