Whats fallen off?

[salty]

Got home last night, and thought because it was dark, I'd illuminate the drivers footwell with a torch, and look under the bonnet to see if there is a glaringly obvious place where the water in the footwell is coming from (the dealer has fixed it/broke it and left it broke, going to attempt to fix it on Sat once I've got the instructions from joospeed, but I digress) I looked on the footwell carpet, and found 2 (1 broken in half) electrical components. Looks like they have a part number (RS 304 560), and look like an LED with a Light Sensor opposite. I looked under, at the steering column, but couldn't ascertain if they came off the little circuit board. The only thing I can guess at, is that they are the indicator cut off switches, since the Cerby doesn't have the manual canceller, and my indicators do not cancel. Then again, with the water in my drivers side footwell, I've had indicators/windows/doors/lights/everthing play up from time to time (depends if it is hot and the water has chance to evaporate and cover the electrics). So any ideas what they are? Are they easy to replace, or put up with it and wait for the next time it goes to the dealership? Thanks, Paul