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Hello people, my first post so be gentle with me. I have had my A3 1.9 tdi e sport for around 8 months, fault free. It 09 plate and has suddenly developed a rather annoying fault. On the dashboard there is a red brake warning light (marked in the pic below) that normally goes out when you take off the handbrake, but it now does not go out, and as I start to drive i get a message on the clocks saying "warning hand brake applied" along with a constant tone. At the same time this started happening, my auto door lock is also randomly unlocking and locking the doors while driving, and unlocking them when I stop. Things I have checked. Two different mechanics whom I know well have plugged into it and the only fault code is an intermittent fault 00470 Databus for comfort system; open circuit. They both say the same thing, that this is something often picked up in healthy cars being intermittent. I have spent an hour taking out the centre console to check the handbrake switch and checked their is voltage to the switch and back to earth. I have checked out the brake fluid reservoir levels, level sensor and again power to and earth from it. Brake pads have well over 50 - 60% on them (visual check). Wiring in between the doors and a-posts, all good with no signs of ware or breakage. The car has no other symptoms and showed no signed of anything being wrong up until a few days ago when the above mentioned started happening. Any help with ideas of what else I can check myself before I take it to a specialist would be gratefully accepted. Thanks in advance.