As the title says, just recently (and very sporadically - 1 in every 4 times?) 2007 Audi will not start and instead gives me three or maybe four long beeps, red exclamation mark in display unit saying "Brakes", dashboard lights up like a Christmas tree and no response from ignition. Then, wait a few minutes and it's right as rain! Changed battery, made no difference. Any ideas? Brakes are absolutely fine btw, so not sure huw accurate warning message is. I've made a video but not sure if I can upload or not. ps - seems not, can only insert URL?!