Leighcm,
you are correct. It is located in a recess at the bottom left corner of the glove box door. It is actually part of the dash that is covered by the glove box door.
Problem is it still doesn't reset:
What I was told the reset procedure is: Start the car, press the reset for approximately two seconds. The light should go out, the press the reset button again until the light flashes three times. On mine the light never goes out so I suspect one of the sensors has gone to heck already. Not to impressive, 12 months 13,000 miles.
Roy