The brake light switch was an issue on my mk2 Clio. I noticed shortly after having it that the brake lights only came on if I used the brakes quite heavily. On soft presses they didn't work. But when I say soft presses I mean to stop the car from 30 in a normal manner! Lol! Took it to Renault who fitted a new switch and then I realised on the way home the lights weren't working at all! So I took it back they made it the same as it was before I inicially took it in. So me and my dad sorted it in the end! But the switch was mounted on a none adjustable bracket, the only way to adjust it was by bending it with some pliers!