The Brake light switch is always falling out on the 206 - I know loads of people it happened to. This meant that the brake lights were always on until someone told the driver about it.
I dont think it's only the 206 either ! I wasn't aware of this problem but I do recall driving behind a 307cc ( or 306 - not sure - it was a 02 model anyway) for about 5 miles annoyed that the brakelights were on the whole time ! When the driver pulled into a garage I told her about it ( yes her, you wouldn't expect a bloke to drive one of these now - would you?)
Now if I could just figure out why the headlights on my alfa dim when I switch on the indicators . . . .