Probably master brake cylinder getting stuck and not releasing properly all the way, had it on A6. Brakes are dragging a bit, heat up, brake fluid expands and presses brake pads harder and heat them more and so on until pressure increase so much you cannot drive. ABS sensor was probably OK, it was just showing pressure when the car was not expecting any.
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Currently 8less
2011 Q7 S Line 3.0TDI, 2016 Tesla Model S 90D
8 history:
2006 A8 Sport 4.2TDI quattro SOLD,
1997 S8, reached end of life with gearbox failure
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