My brakes malfunctioned (booster) and I hit the side of a semi head on. Engine ran fine heater worked while crews cleaned up mess and she drove fine the next day. I had noticed a few green drops coming from driver side immediately after wreck. Three weeks later (being parked and cold temps) she started with a jump but now much steadier leak. Reservoir is full and after driving (no air on) for 20 mins or so temp was fine. What's wrong with my baby and how to fix?