hi all, i'm new to the forum and i will update my profile with pics of my beloved car tomorrow. for now i need a little help, my car is a 1997 a4 estate 1.9 tdi, i don't have a manual for the car and tonight a red light on my dashboard started flashing. the symbol on it is a question mark with a circle around it and a part circle around the sides of that. can anyone tell me what this light is and what it means and also what i can do to rectify it?

 

something to do with your breaks. probably need to be replaced