Hi, I'm new on here and am looking for some help with my 1999 S4. I did a search for this topic first but couldn't find a thread, hence this new post. The brake bulb warning lamp comes up on the check system continuously. In fact it is on most of the time - which is the less frustrating as sometimes it keeps going off then coming on again when driving (without touching the brakes), when of course it beeps and is highly annoying! All the bulbs are working, even the third brake lamp bulbs, so I'm not sure what is causing this unless there is maybe a grounding issue somewhere. Has anybody experienced this before or is there an auto electrician out there that can point me in the right direction? Thanks.