The verdict is back.  Our Audi Q5 needs a new engine.  It is suspected that the timing belt slipped causing massive internal damage. Fortunately, the folks at Audi agreed with my strongly worded letter on the subject that a properly maintained engine should not fail catastrophically after 77K miles.They have agreed to cover the full cost of the $12,000+ repair.  We hope to have the car back in 3 weeks.  In the mean time, Maya will be without a car and I will be providing Uber service.