Hi all, just bought a A4 1.8 saloon yesterday but got a few problems with it, heating only gets warm and not especially hot, airbag light on, abs light on and brake light constantly flashing, any advice to most common solutions to these issues would be greatly appreciated, also got no central locking remote with it, should it have one and if so what type as on ebay there's 2 or 3 button versions, thanks