OXS, TEMP, BRAKE, BATTERY

[buck rogers]

Hello everyone, im kinda new to the quattro list but none the less i figured it would be good to get to know more about my car. I have an 84 4000 S Quattro, its in decent shape but will be a show car but the time im done with it (20 to 30 years from now). 
I have a simple question that i couldnt answer myself it just came up, My OXS, TEMP, BRAKE and BATTERY Warning lights just came on all at once and well i dont know what to do. Thank you to anyone that can help.
 
Buck


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